CA1137935A - Axial web spreading means for wound roll sheet dispensers - Google Patents
Axial web spreading means for wound roll sheet dispensersInfo
- Publication number
- CA1137935A CA1137935A CA000354533A CA354533A CA1137935A CA 1137935 A CA1137935 A CA 1137935A CA 000354533 A CA000354533 A CA 000354533A CA 354533 A CA354533 A CA 354533A CA 1137935 A CA1137935 A CA 1137935A
- Authority
- CA
- Canada
- Prior art keywords
- feed roller
- roll
- sheet material
- roller
- knife
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/005—Dispensers, i.e. machines for unwinding only parts of web roll
Abstract
ABSTRACT
A dispenser for wound rolls of flexible sheet material, such as, paper towels, toilet tissue or the like has inwardly facing tracks on the opposite inner side walls of the dispenser housing to receive therein outwardly projecting spindles carried by wound rolls to be dispensed for the rolls to move in succession downwardly relative to the tracks with a section of the lower end of each track slanting away from a feed roller mounted adjacent the lower end of the dispenser housing and each track having at such lower end section a pivotally mounted roll rotation driving guide biased toward the track center to form the lower side of each track section slanting away from the feed roller. A pressure roller is biased into rotating engagement with the feed roller for flexible sheet material to drivingly pass therebetween with the pressure roller having at least one resiliently deformable segment that is eccentric to the pressure roller axis to pick up the leading free end of sheet material on a full roll and lead it into the nip between the feed roller and pressure roller, this pressure roller also has axially spaced conical resilient portions along the length thereof with the conical portions facing from the opposite ends of the pressure roll inwardly toward the mid-point of the pressure roll to promote spreading out the sheet material passing between the feed roller and the pressure roller. A serrated cutting knife is pivotally mounted within the feed roller to sever the sheet material, the serrations on the knife being spaced to accommodate therebetween the deformable eccentric segment and the conical portions on the pressure roller during initial projection of the knife from within the feed roller in severing the sheet material. The cutting knife swings about an axis laterally displaced from the plane of a radially outward portion of the knife and cam followers are carried by the ends of the knife extending beyond the ends of the feed roller with the followers displaced from the pivot mounting axis of the knife. Stationary cams are mounted adjacent the ends of the feed roller with which the cam followers on the knife edge engage to positively project the knife cutting edge beyond the feed roller periphery and retract the cutting edge upon rotation of the feed roller.
A dispenser for wound rolls of flexible sheet material, such as, paper towels, toilet tissue or the like has inwardly facing tracks on the opposite inner side walls of the dispenser housing to receive therein outwardly projecting spindles carried by wound rolls to be dispensed for the rolls to move in succession downwardly relative to the tracks with a section of the lower end of each track slanting away from a feed roller mounted adjacent the lower end of the dispenser housing and each track having at such lower end section a pivotally mounted roll rotation driving guide biased toward the track center to form the lower side of each track section slanting away from the feed roller. A pressure roller is biased into rotating engagement with the feed roller for flexible sheet material to drivingly pass therebetween with the pressure roller having at least one resiliently deformable segment that is eccentric to the pressure roller axis to pick up the leading free end of sheet material on a full roll and lead it into the nip between the feed roller and pressure roller, this pressure roller also has axially spaced conical resilient portions along the length thereof with the conical portions facing from the opposite ends of the pressure roll inwardly toward the mid-point of the pressure roll to promote spreading out the sheet material passing between the feed roller and the pressure roller. A serrated cutting knife is pivotally mounted within the feed roller to sever the sheet material, the serrations on the knife being spaced to accommodate therebetween the deformable eccentric segment and the conical portions on the pressure roller during initial projection of the knife from within the feed roller in severing the sheet material. The cutting knife swings about an axis laterally displaced from the plane of a radially outward portion of the knife and cam followers are carried by the ends of the knife extending beyond the ends of the feed roller with the followers displaced from the pivot mounting axis of the knife. Stationary cams are mounted adjacent the ends of the feed roller with which the cam followers on the knife edge engage to positively project the knife cutting edge beyond the feed roller periphery and retract the cutting edge upon rotation of the feed roller.
Description
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MULTIPLE ~YOUND ROLL DISPENSER AND CUTTER MECHANISM FQR
USE THEREIN
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This invention relates to dispensers for wound rolls of flexible sheet material and particularly to dispensers for rolls of paper towels, tissue paper, and the like, wherein each roll has supporting spindles pro~ecting outwardly from the ends of the core of the roll. More 5 specifically, the dispensers to which the instant invention relates, are concerned with dispensing a web Qf flexible sheet material from wound rolls wherein multiple rolls can be retained for dispensing from each roll in sùccession with precision in unwinding the material from each roll and assurance that the leading free end on the exterior of each 10 wound roll will feed into the dispensing mechanism with reliability so that the user will have accessibi?Uty to the sheet material exteriorly of the dispenser housing. Importantly, the invention also involves a mechanism adapted to be used within dispensers for cuttin~ a web of flexible sheet material into individual lengths of the material.
Numerous web dispensing constructions are known in the prior art nnd employed in commercial use where a paper towel dispenser, for example, is mounted on a wall in a locntion where towel availability is desired. Considering the large number of such dispensers employed in m~ny commercial installations SUCIl as factories, office buildings, 20 institutions, etc., more and more attention has been devoted to consideration of the substantial expense in time nnd labor required in replenishing the exhausted wound rolls in such dispensers, particularly where a single roll is the limit of cnpability to be housed within ench dispenser unit.
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Accordingly, many structures have been developed to accommodate mul~iple rolls of wound sheet material so that the individual dispenser need only be replenished when the entire co~plel~nt of rolls within the dispenser has been exhausted, namely, where a first roll has been used 5 up and a reserve roll is available within the dispenser to move into the dispensing position and feed out the sheet material from such reserve roll. Obviously, this reduces the time and expense required in replenishing rolls in the multitude of dispensers in a commercial establishment so that the labor cost is correspondingly reduced.
Whereas the single roll dispenser can be easily loaded with a roll by an attendant and the free leading web end on the roll threaded in and through the dispensing mechanism to be available to a user externally of the dispenser housin~, the adYent of dispensers accommodatin~ multiple rolls gave rise to particular problems in providing a construction which 15 effectively enables the leading free web end on the exterior of a reserve roll to be picked up by the dispensing mechanism in the dispenser and reliably fed out OI the dispenser once an initial roll has been exhausted.
The problem is to assure that this pick up and feeding from the reserve roll is effectively and accurately carried out automatica~ly in the absence ~0 of an attendant having to return to the dispenser to start the leading free end of the reserve roll out through the feeding mechanism. Of course, this would defeat the purpose of multiple roll dispensers.
The prior art has proposed numerous ideas, constructions and mechanisms to carry out this pick up of the leading free end on a ~5 reserve roll. Each hopefully aims at getting automatic and accurate feeding of the end of the new roll into the feeding mechanism so that the multiple roll dispenser can continue operating and supply its web of sheet material to the prospective users of the dispenser. Whereas attempts in development of multiple roIl dispensers have sought to 30 achieve the ultimate, there have been numerous defects and failings in achieving assurance that the web of paper on the reserve roll is properly picked up, properly fed to the dispensing mechanism and properly available to the prospective users exteriorally of the dispenser housing.
These problems call for structures that are simple and yet effective 35 if the dispenser is to be readily understood and adaptable to easy loadin~
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by attendants who could become confused with structures involving complicated dispensing mechanisms where threading of even the lead end of the initial wound roll may be overly complicated. With complex dispensers, proper loading and assurance that the lead end on a reserve 5 roll will be picked up may be beyond the comprehension of attendants who are assigned the task of loading numerous multiple roll dispensers in commercial establishments that employ a great number or even small number of multiple roll dispensers.
In the prior art perforating or severing mechanisms used in towel 10 dispensers have included a rotatably mounted knif e and a cooperating rotatably mounted roller having a slot therein for receiving the radially outward portion of the knif e as the knif e rotates past the roller. The web of flexible sheet material is passed between the roller and the knife to be perforated or severed when the radially outward knife portion 15 enters the slot in the ro~ler.
Such perforating or severing mechanisms are satisfactory for perforating or severing relatively unstretchable flexible sheet materials such as uncreped paper toweling. Elowever, with the increased use of relatively stretchable flexible sheet materials, such as embossed or creped 20 paper toweling, the prior art perforating and severing mechanisms have proved unsatisfactory because the web of sheet material tends to stretch about the cutting edge of the knif e instead of being perforated or severed thereby. Although precisialrotary shears are also known which could be employed for obviating this problem, such shears are much too
MULTIPLE ~YOUND ROLL DISPENSER AND CUTTER MECHANISM FQR
USE THEREIN
.
This invention relates to dispensers for wound rolls of flexible sheet material and particularly to dispensers for rolls of paper towels, tissue paper, and the like, wherein each roll has supporting spindles pro~ecting outwardly from the ends of the core of the roll. More 5 specifically, the dispensers to which the instant invention relates, are concerned with dispensing a web Qf flexible sheet material from wound rolls wherein multiple rolls can be retained for dispensing from each roll in sùccession with precision in unwinding the material from each roll and assurance that the leading free end on the exterior of each 10 wound roll will feed into the dispensing mechanism with reliability so that the user will have accessibi?Uty to the sheet material exteriorly of the dispenser housing. Importantly, the invention also involves a mechanism adapted to be used within dispensers for cuttin~ a web of flexible sheet material into individual lengths of the material.
Numerous web dispensing constructions are known in the prior art nnd employed in commercial use where a paper towel dispenser, for example, is mounted on a wall in a locntion where towel availability is desired. Considering the large number of such dispensers employed in m~ny commercial installations SUCIl as factories, office buildings, 20 institutions, etc., more and more attention has been devoted to consideration of the substantial expense in time nnd labor required in replenishing the exhausted wound rolls in such dispensers, particularly where a single roll is the limit of cnpability to be housed within ench dispenser unit.
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Accordingly, many structures have been developed to accommodate mul~iple rolls of wound sheet material so that the individual dispenser need only be replenished when the entire co~plel~nt of rolls within the dispenser has been exhausted, namely, where a first roll has been used 5 up and a reserve roll is available within the dispenser to move into the dispensing position and feed out the sheet material from such reserve roll. Obviously, this reduces the time and expense required in replenishing rolls in the multitude of dispensers in a commercial establishment so that the labor cost is correspondingly reduced.
Whereas the single roll dispenser can be easily loaded with a roll by an attendant and the free leading web end on the roll threaded in and through the dispensing mechanism to be available to a user externally of the dispenser housin~, the adYent of dispensers accommodatin~ multiple rolls gave rise to particular problems in providing a construction which 15 effectively enables the leading free web end on the exterior of a reserve roll to be picked up by the dispensing mechanism in the dispenser and reliably fed out OI the dispenser once an initial roll has been exhausted.
The problem is to assure that this pick up and feeding from the reserve roll is effectively and accurately carried out automatica~ly in the absence ~0 of an attendant having to return to the dispenser to start the leading free end of the reserve roll out through the feeding mechanism. Of course, this would defeat the purpose of multiple roll dispensers.
The prior art has proposed numerous ideas, constructions and mechanisms to carry out this pick up of the leading free end on a ~5 reserve roll. Each hopefully aims at getting automatic and accurate feeding of the end of the new roll into the feeding mechanism so that the multiple roll dispenser can continue operating and supply its web of sheet material to the prospective users of the dispenser. Whereas attempts in development of multiple roIl dispensers have sought to 30 achieve the ultimate, there have been numerous defects and failings in achieving assurance that the web of paper on the reserve roll is properly picked up, properly fed to the dispensing mechanism and properly available to the prospective users exteriorally of the dispenser housing.
These problems call for structures that are simple and yet effective 35 if the dispenser is to be readily understood and adaptable to easy loadin~
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by attendants who could become confused with structures involving complicated dispensing mechanisms where threading of even the lead end of the initial wound roll may be overly complicated. With complex dispensers, proper loading and assurance that the lead end on a reserve 5 roll will be picked up may be beyond the comprehension of attendants who are assigned the task of loading numerous multiple roll dispensers in commercial establishments that employ a great number or even small number of multiple roll dispensers.
In the prior art perforating or severing mechanisms used in towel 10 dispensers have included a rotatably mounted knif e and a cooperating rotatably mounted roller having a slot therein for receiving the radially outward portion of the knif e as the knif e rotates past the roller. The web of flexible sheet material is passed between the roller and the knife to be perforated or severed when the radially outward knife portion 15 enters the slot in the ro~ler.
Such perforating or severing mechanisms are satisfactory for perforating or severing relatively unstretchable flexible sheet materials such as uncreped paper toweling. Elowever, with the increased use of relatively stretchable flexible sheet materials, such as embossed or creped 20 paper toweling, the prior art perforating and severing mechanisms have proved unsatisfactory because the web of sheet material tends to stretch about the cutting edge of the knif e instead of being perforated or severed thereby. Although precisialrotary shears are also known which could be employed for obviating this problem, such shears are much too
2 5 expensive to be used in flexible sheet material dispensers designed for installation to be used in both commercial and private washrooms.
The wound roll dispenser of the present invention is particularly adaptable for multiple rolls held within the dispenser housing on supporting spindles projecting outwardly from both roll core ends. ~wardly facing 30 tracks on the opposite inner side walls of the dispenser housing receive the outwardly projecting spindles fixedly held in a roll core, either in the form of core end caps or a mandrel, specifically constructed to promote rotation of the rolls as they move downwardly within the tracks.
The lowermost roll engages and is driven by a rotatably mounted feed 35 roller disposed adjacent the bottom ends of the tracks.
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Additionally, as an important part of the invention, a pressure roller, rotatably mounted in the dispenser housing, is associated in driven relation with the feed roller. This pressure roller is formed with eccentrically disp ?sed axially spaced resilient segments that serve, upon 5 rotation of the pressure roller, to pick up the leading free end of sheet material on the xterior of a full roll and feed it into the nip between the feed roller and pressure roller~ thereby assuring that the web material - from a roll in the bottom position of the tracks resting on the feed roller is fed between the rollers and thence out of the dispenser for 10 access by a user. The pressure roller also is provided with axially spaced cylindrical resilient conical portions that press against the feed roller ns the sheet material passes between the nip of the rollers.
The above referred to inwardly facin~ tracks, within which the spindles extending from the roll core ends are supported, have a lower 15 end section of each track slanting away from the longitudinal axis of the main length of the track and generally slanting toward a position tangent to the perimeter of the feed roller. This lower end section of each track is provided with a pivotally supported guide that is biased inwRrdly toward the center line of the track, this guide being disposed 20 on the lo~ver side of the slanting track section. The biased guides promote rotation of the wound roll passing down the tracks by pressing against the periphery of the spindles at opposite ends of the roll. This action rotates the roll during its downward movement within the tracksO
The lo~ver end sec tion of each track need not necessarily be slanted as 25 above mentioned but should have the inwardly biased guide disposed on the side of the track disposed in the direction that t~e sheet material will be dra~vn off of the roll when it is engaging the feed roller and pressure roller while being drawn out of the dispenser.
As for the above mentioned pressure roller, the resiliently 30 defor.mable segments on the pressure roller project eccentrically outwardly throu~hout a part of the periphery of the pressure roller and nre positioned so thflt a full roll at the bottom of the dispenser tracks will not only engage the feed roller but also engage the pressure roller. As the pressure roller rotates with the feed roller the deformable eccentric 35 segments ~ ill move ~ainst the lcading frec cnd of sheet material on .
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the roll causing it to buckle downwardly into the nip between the two rollers. Also, the axially spaced resilient cylindrical portions on the feed roller promote driving of the two rollers by each other as the sheet material is drawn between the nip. These resilient portions 5 preferably are conical in configuration with each conieal portion facing inwardly toward the mid-point of the pressure roller so as to promote spreading out of the sheet material along the width of the nip between the rollers. The dispenser of the invention embodying the above described features also preferably is provided with a mechanism for stopping 10 rotation of the feed roller and pressure roller and thus arresting movement of the sheet material so that an individual sheet of material which has been severed from the web of ~ material unwound from the roll has its îree end immediately accessible to a user Also, a cam actuated knife pivotally mounted within the feed 15 roller is projected through an elongated opening in the feed roller wall as the feed roller is rotated with the sheet material overlying its surface. The cam action is constructed to positively project and retract the knife relative to the opening in the feed roller and the activating c~ms are stationarily mounted such that the knife, which has serrations 20 therealong, initially projects outwardly immediately before the web of material reaches the nip of the feed ro~ler and pressure roller. There serrations are spaced to enter between the eccentric segments and conical resilient portions carried by the pressure roller to start perforation of the web adjacent the nip of the rollers.
Further, the invention provides a cutting mechanism comprising a chnssis and a rotntably mounted feed roller on the chassis over which the web of material passes. A knife is pivotally mounted in the feed roller, to swing about an axis which is laterally displaced from the plane of the knife, radially outwardly with a portion of the knife defining a 30 cutting edge for the web. This edge is projected outwardly through an opening in the feed roller beyond the periphery of the feed roller to cut the web AS it passes over the feed roller. The knife carries cam followers displaccd from the pivot mounting axis of the knife and station~ry cams are mounted adjacent the ends of the feed roller with 35 which the cam followcrs on the knife engage to positivcly project and ,~ : , ,: .. ' '.
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The wound roll dispenser of the present invention is particularly adaptable for multiple rolls held within the dispenser housing on supporting spindles projecting outwardly from both roll core ends. ~wardly facing 30 tracks on the opposite inner side walls of the dispenser housing receive the outwardly projecting spindles fixedly held in a roll core, either in the form of core end caps or a mandrel, specifically constructed to promote rotation of the rolls as they move downwardly within the tracks.
The lowermost roll engages and is driven by a rotatably mounted feed 35 roller disposed adjacent the bottom ends of the tracks.
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Additionally, as an important part of the invention, a pressure roller, rotatably mounted in the dispenser housing, is associated in driven relation with the feed roller. This pressure roller is formed with eccentrically disp ?sed axially spaced resilient segments that serve, upon 5 rotation of the pressure roller, to pick up the leading free end of sheet material on the xterior of a full roll and feed it into the nip between the feed roller and pressure roller~ thereby assuring that the web material - from a roll in the bottom position of the tracks resting on the feed roller is fed between the rollers and thence out of the dispenser for 10 access by a user. The pressure roller also is provided with axially spaced cylindrical resilient conical portions that press against the feed roller ns the sheet material passes between the nip of the rollers.
The above referred to inwardly facin~ tracks, within which the spindles extending from the roll core ends are supported, have a lower 15 end section of each track slanting away from the longitudinal axis of the main length of the track and generally slanting toward a position tangent to the perimeter of the feed roller. This lower end section of each track is provided with a pivotally supported guide that is biased inwRrdly toward the center line of the track, this guide being disposed 20 on the lo~ver side of the slanting track section. The biased guides promote rotation of the wound roll passing down the tracks by pressing against the periphery of the spindles at opposite ends of the roll. This action rotates the roll during its downward movement within the tracksO
The lo~ver end sec tion of each track need not necessarily be slanted as 25 above mentioned but should have the inwardly biased guide disposed on the side of the track disposed in the direction that t~e sheet material will be dra~vn off of the roll when it is engaging the feed roller and pressure roller while being drawn out of the dispenser.
As for the above mentioned pressure roller, the resiliently 30 defor.mable segments on the pressure roller project eccentrically outwardly throu~hout a part of the periphery of the pressure roller and nre positioned so thflt a full roll at the bottom of the dispenser tracks will not only engage the feed roller but also engage the pressure roller. As the pressure roller rotates with the feed roller the deformable eccentric 35 segments ~ ill move ~ainst the lcading frec cnd of sheet material on .
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the roll causing it to buckle downwardly into the nip between the two rollers. Also, the axially spaced resilient cylindrical portions on the feed roller promote driving of the two rollers by each other as the sheet material is drawn between the nip. These resilient portions 5 preferably are conical in configuration with each conieal portion facing inwardly toward the mid-point of the pressure roller so as to promote spreading out of the sheet material along the width of the nip between the rollers. The dispenser of the invention embodying the above described features also preferably is provided with a mechanism for stopping 10 rotation of the feed roller and pressure roller and thus arresting movement of the sheet material so that an individual sheet of material which has been severed from the web of ~ material unwound from the roll has its îree end immediately accessible to a user Also, a cam actuated knife pivotally mounted within the feed 15 roller is projected through an elongated opening in the feed roller wall as the feed roller is rotated with the sheet material overlying its surface. The cam action is constructed to positively project and retract the knife relative to the opening in the feed roller and the activating c~ms are stationarily mounted such that the knife, which has serrations 20 therealong, initially projects outwardly immediately before the web of material reaches the nip of the feed ro~ler and pressure roller. There serrations are spaced to enter between the eccentric segments and conical resilient portions carried by the pressure roller to start perforation of the web adjacent the nip of the rollers.
Further, the invention provides a cutting mechanism comprising a chnssis and a rotntably mounted feed roller on the chassis over which the web of material passes. A knife is pivotally mounted in the feed roller, to swing about an axis which is laterally displaced from the plane of the knife, radially outwardly with a portion of the knife defining a 30 cutting edge for the web. This edge is projected outwardly through an opening in the feed roller beyond the periphery of the feed roller to cut the web AS it passes over the feed roller. The knife carries cam followers displaccd from the pivot mounting axis of the knife and station~ry cams are mounted adjacent the ends of the feed roller with 35 which the cam followcrs on the knife engage to positivcly project and ,~ : , ,: .. ' '.
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retract the knife cutting edge upon rota-tion of the feed roller.
With the foregoing in mind, it is an object of an aspect of the present invention to provide a flexible sheet material dispenser having improved mDunting for wound rolls carried within the dispenser to assure rotation of the rolls in promoting the dispensing action~
An object of an aspect of the invention is to prnvide for inter-engaging feed and pressure r~llers with the pressure roller especially configured to promote pick up of a leading end of sheet material on the exterior of a full wound roll.
An object of an aspect of the invention is to provide a pressure roll in accordanoe with the abo~e ~bject wherein resilient means are carried spaced along the length of the roll to promote, incident rota-tion of the pressure roller, spreading out of the sheet material across the width of the nip between a feed roller and pressure roller.
An object of an aspect of the invention is to provide a dispen-ser having opposite inwardly facing tracks to receive the spindles of rolls to be dispensed from the dispenser where a lcwer end section of each track carries a guide means which is biased inwa~dly tcwar~ the center of the track to offer a friction surfaoe along which the peri-phery of a roll spindle within the track will engage to promote roll rotation.
It is also an object of an aspect of the instant invention, in accordance with the above object, to emoloy a slanting lower end section of each track which slants away from the axis of a feed roller 25 with the biased guide means of each track being located on the lower side of each slanting track section.
An object of an aspect of the invention is to provide a dis-penser in accordanoe with the above objects wherein one roll spindle has a peripheral groove spa oe d inwardly from the outermDst end of the 30 spindle and one track has flange means through which t~e grcove passes when the spindle is lowered into the dispenser tracks such that proper loading direction-wise for the r~ll within the dispenser is assured.
An dbject of an aspect of the invention is to pr~vide a flex-ible sheet material dispen æ r having a mechanism for effecti~ely cut-ting a web of flexible sheet material being rem~ved from a r~11 with-in the dispenser.
An object of an aspect of the invention is to provide a " ' `, .. . . . . . .
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mechanism including a knife within a feed roller where the knife is projected outwardly beyond the periphery of the feed roller to cut the web as it passes over the feed roller.
Further to the above two objects, the cut~ing knife is pivotally mounted within a feed roller and stationary cam exter-nal of the feed roller operate to positively project and re-tract the cutting Xnife incident rotation of the feed roller, as a further object of an aspect of the invention.
It is an object of an aspect of the invention to provide a flexible sheet material dispenser having a web cut-ting mechanism which dispenser is compact, rugged and economi-cal to manufacture and that is ideally suited for both com-merical and private installations.
An aspect of the invention is as follows:
A dispenser for wound rolls of flexible sheet material comprising; a housing, means mounted within said housing for rotatably supporting a roll therein, a feed roller rotatably mounted within said housing, and a pressure roller rotatably mounted within said housing and engaging said feed roller, said feed and pressure rollers defining a nip therebetween through which sheet material passes; characterized by said pressure roller including means at spaced apart locations along the length of said pressure roller for urging the sheet material axially outwardly of said feed roller to spread the material along the surface of said feed roller as the material passes through said nip.
The foregoing and other objects of the invention will become apparent upon consideration of the detailed descrip-tion of a preferred embodiment of the invention given in con-nection with the following described drawings which form a part of this invention.
Figure 1 is a front elevational view of the wound roll dispenser for flexible sheet material of this invention with the front cover broken away to expose components within the interior of the dispenser housing.
Figure 2 is a sectional view taken on line 2-2 of Figure 1.
Figure 3 is a view, partly in section, taken on line 3-3 of Figure 2.
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-7a-Figure 4 is an exploded perspective view showing a roll mounting spindle relative to one of the inwardly facing tracks which are located on the opposite inner side walls of the dis-penser housing.
Figure 5 is a view taken on line 5-5 of Figure 1 with the cover side wall of the dispenser housing removed to expose the mechanism for feeding flexible sheet material.
Figure 6 is a view similar to Figure 5 but showing the dis-penser mechanism in a position where web material dispensing is in progress.
Figure 7 is a sectional view through the front cover, back and bottom of the dispenser housing showing positions of wound rolls relative to a feed roller, cam activated cutting knife and pressure roller disposed within the housing.
Figure 8 is a perspective view showing the feed roller, pressure roller, material cutting knife and one stationary cam for actuating the , , ,. , ~:
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3~i knife from within the feed roller.
Figure 9 is an end view, witll portions shown in phantom, illustrating the action of camming the material cutting knife from within the feed roller shown in Figure 8.
Figure 10 is a partial end view sllowing the relationship of the feed roller and pressure rRller to a full wound roll of material as the pressure roller approaches picking up the leading free web end of a full roll. -Figure 11 is n view similar to Figure 10 but showing the pressure roller buckling the free end of the web material on a full ro~l to be fed ~etween the nip of the feed roller and the pressure roller.
Figure 12 is a view also similar to the showing in Figure 10 showing the lead end of the full l oll being fed downwardly between the nip of the feed and pressure rollers.
Figure 13 is a perspective view showing a resiliently deformable segment which is eccentric to the pressure roll axis to pick up the leading edge of sheet material on a full roll.
Figure 1~ is a perspective view of an alternative embodiment for a resiliently deformable eccentric segment to that shown in Figure 130 Figure 15 is a sectional view of the front portion of the dispenser showing the cuttin~ mechanism within the cllassis in relation to a roll of flexible sheet material.
~igure 16 is a sectional view taken on line 16-16 of Figure 15O
Figure 17 is an elevational view taken on line 17-17 of Figure 16.
~5 Figure 18 is a perspective view of the cutting knife that is mounted in the feed roller shown in Figures 15 and 16.
Figure 19 is a view partiy in section showing the over~center menns for driving the feed roller through a portion of each rotation, and Figure 20 is an elevational view showing the over-center means and anti-reversing pawl engaging notches spaced around the periphery of the feed wheel.
The complcte wound roll dispenser is stlown in Figure 1 ~lS 11 multiple roll dispenser provided with a housing 10 made up of a cover 12, thc lower portion bcin~ removed to expose the inner workings of 3~
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the dispenser, a chassis 14 which providcs inner side walls lfi and 18 and a back wall 20. A bottom waU 22 is also provided l)y chassis 14 as part of the dispenser housing 10, as best seen in Figure 7. An elongated opening 2~ across a major portion of the width of the dispenser housing S is provided at the forward end of the bottom wall 22 of chassis 14 to provide means for leading the dispensed sheet material to access to a user.
In the embodiment shown, each of the opposite iMer side walls 16 and 18 is provided with a vertical tracl~ 26, these being shown in 10 section on Figure 2 and one track, shown in perspective on Figure 4, as carried by side wall 18. Side wall tracks 26 face inwardly to receive therein the spindles projecting outwardly from the core C of wound roll R of flexible sheet material.
A forward portion 28 of the back wall of each track 26 is inclined 15 inwardly toward the interior of the dispenser housirlg 10~ These inwardly inclined portions 28 of the tracks 26 engage the ends of the spindle extending outwardly from the ends OI the core C of roll R adjacent the forward periphery of each spindle end as seen in Figure 2. Thus, as a roll I~ moves down within tracks 26, engagement of the forward 20 end portions of the spindles by inclined portions 28 tends to rotate the roL~ R in the direction that the sheet material will eventually be unwound from the roll. However, in a cabinet where multiple rolls are positioned within the tracks the presence of the lowermost roll while being dispensed from the dispenser with the reserve roll resting thereon will prevent 25 the rotation of an upper reserve ro11 from unwinding its sheet material prior to the lowermost roll being substantially e:chausted and moving into discard pocket P for spent roll cores. Then the reserve roll moves down into position to have the free leading end of its web of sheet material fed outwardly from the dispenser to the user.
In the embodiment illustrated, as best shown in Figures 2, 3 and
retract the knife cutting edge upon rota-tion of the feed roller.
With the foregoing in mind, it is an object of an aspect of the present invention to provide a flexible sheet material dispenser having improved mDunting for wound rolls carried within the dispenser to assure rotation of the rolls in promoting the dispensing action~
An object of an aspect of the invention is to prnvide for inter-engaging feed and pressure r~llers with the pressure roller especially configured to promote pick up of a leading end of sheet material on the exterior of a full wound roll.
An object of an aspect of the invention is to provide a pressure roll in accordanoe with the abo~e ~bject wherein resilient means are carried spaced along the length of the roll to promote, incident rota-tion of the pressure roller, spreading out of the sheet material across the width of the nip between a feed roller and pressure roller.
An object of an aspect of the invention is to provide a dispen-ser having opposite inwardly facing tracks to receive the spindles of rolls to be dispensed from the dispenser where a lcwer end section of each track carries a guide means which is biased inwa~dly tcwar~ the center of the track to offer a friction surfaoe along which the peri-phery of a roll spindle within the track will engage to promote roll rotation.
It is also an object of an aspect of the instant invention, in accordance with the above object, to emoloy a slanting lower end section of each track which slants away from the axis of a feed roller 25 with the biased guide means of each track being located on the lower side of each slanting track section.
An object of an aspect of the invention is to provide a dis-penser in accordanoe with the above objects wherein one roll spindle has a peripheral groove spa oe d inwardly from the outermDst end of the 30 spindle and one track has flange means through which t~e grcove passes when the spindle is lowered into the dispenser tracks such that proper loading direction-wise for the r~ll within the dispenser is assured.
An dbject of an aspect of the invention is to pr~vide a flex-ible sheet material dispen æ r having a mechanism for effecti~ely cut-ting a web of flexible sheet material being rem~ved from a r~11 with-in the dispenser.
An object of an aspect of the invention is to provide a " ' `, .. . . . . . .
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mechanism including a knife within a feed roller where the knife is projected outwardly beyond the periphery of the feed roller to cut the web as it passes over the feed roller.
Further to the above two objects, the cut~ing knife is pivotally mounted within a feed roller and stationary cam exter-nal of the feed roller operate to positively project and re-tract the cutting Xnife incident rotation of the feed roller, as a further object of an aspect of the invention.
It is an object of an aspect of the invention to provide a flexible sheet material dispenser having a web cut-ting mechanism which dispenser is compact, rugged and economi-cal to manufacture and that is ideally suited for both com-merical and private installations.
An aspect of the invention is as follows:
A dispenser for wound rolls of flexible sheet material comprising; a housing, means mounted within said housing for rotatably supporting a roll therein, a feed roller rotatably mounted within said housing, and a pressure roller rotatably mounted within said housing and engaging said feed roller, said feed and pressure rollers defining a nip therebetween through which sheet material passes; characterized by said pressure roller including means at spaced apart locations along the length of said pressure roller for urging the sheet material axially outwardly of said feed roller to spread the material along the surface of said feed roller as the material passes through said nip.
The foregoing and other objects of the invention will become apparent upon consideration of the detailed descrip-tion of a preferred embodiment of the invention given in con-nection with the following described drawings which form a part of this invention.
Figure 1 is a front elevational view of the wound roll dispenser for flexible sheet material of this invention with the front cover broken away to expose components within the interior of the dispenser housing.
Figure 2 is a sectional view taken on line 2-2 of Figure 1.
Figure 3 is a view, partly in section, taken on line 3-3 of Figure 2.
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-7a-Figure 4 is an exploded perspective view showing a roll mounting spindle relative to one of the inwardly facing tracks which are located on the opposite inner side walls of the dis-penser housing.
Figure 5 is a view taken on line 5-5 of Figure 1 with the cover side wall of the dispenser housing removed to expose the mechanism for feeding flexible sheet material.
Figure 6 is a view similar to Figure 5 but showing the dis-penser mechanism in a position where web material dispensing is in progress.
Figure 7 is a sectional view through the front cover, back and bottom of the dispenser housing showing positions of wound rolls relative to a feed roller, cam activated cutting knife and pressure roller disposed within the housing.
Figure 8 is a perspective view showing the feed roller, pressure roller, material cutting knife and one stationary cam for actuating the , , ,. , ~:
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3~i knife from within the feed roller.
Figure 9 is an end view, witll portions shown in phantom, illustrating the action of camming the material cutting knife from within the feed roller shown in Figure 8.
Figure 10 is a partial end view sllowing the relationship of the feed roller and pressure rRller to a full wound roll of material as the pressure roller approaches picking up the leading free web end of a full roll. -Figure 11 is n view similar to Figure 10 but showing the pressure roller buckling the free end of the web material on a full ro~l to be fed ~etween the nip of the feed roller and the pressure roller.
Figure 12 is a view also similar to the showing in Figure 10 showing the lead end of the full l oll being fed downwardly between the nip of the feed and pressure rollers.
Figure 13 is a perspective view showing a resiliently deformable segment which is eccentric to the pressure roll axis to pick up the leading edge of sheet material on a full roll.
Figure 1~ is a perspective view of an alternative embodiment for a resiliently deformable eccentric segment to that shown in Figure 130 Figure 15 is a sectional view of the front portion of the dispenser showing the cuttin~ mechanism within the cllassis in relation to a roll of flexible sheet material.
~igure 16 is a sectional view taken on line 16-16 of Figure 15O
Figure 17 is an elevational view taken on line 17-17 of Figure 16.
~5 Figure 18 is a perspective view of the cutting knife that is mounted in the feed roller shown in Figures 15 and 16.
Figure 19 is a view partiy in section showing the over~center menns for driving the feed roller through a portion of each rotation, and Figure 20 is an elevational view showing the over-center means and anti-reversing pawl engaging notches spaced around the periphery of the feed wheel.
The complcte wound roll dispenser is stlown in Figure 1 ~lS 11 multiple roll dispenser provided with a housing 10 made up of a cover 12, thc lower portion bcin~ removed to expose the inner workings of 3~
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the dispenser, a chassis 14 which providcs inner side walls lfi and 18 and a back wall 20. A bottom waU 22 is also provided l)y chassis 14 as part of the dispenser housing 10, as best seen in Figure 7. An elongated opening 2~ across a major portion of the width of the dispenser housing S is provided at the forward end of the bottom wall 22 of chassis 14 to provide means for leading the dispensed sheet material to access to a user.
In the embodiment shown, each of the opposite iMer side walls 16 and 18 is provided with a vertical tracl~ 26, these being shown in 10 section on Figure 2 and one track, shown in perspective on Figure 4, as carried by side wall 18. Side wall tracks 26 face inwardly to receive therein the spindles projecting outwardly from the core C of wound roll R of flexible sheet material.
A forward portion 28 of the back wall of each track 26 is inclined 15 inwardly toward the interior of the dispenser housirlg 10~ These inwardly inclined portions 28 of the tracks 26 engage the ends of the spindle extending outwardly from the ends OI the core C of roll R adjacent the forward periphery of each spindle end as seen in Figure 2. Thus, as a roll I~ moves down within tracks 26, engagement of the forward 20 end portions of the spindles by inclined portions 28 tends to rotate the roL~ R in the direction that the sheet material will eventually be unwound from the roll. However, in a cabinet where multiple rolls are positioned within the tracks the presence of the lowermost roll while being dispensed from the dispenser with the reserve roll resting thereon will prevent 25 the rotation of an upper reserve ro11 from unwinding its sheet material prior to the lowermost roll being substantially e:chausted and moving into discard pocket P for spent roll cores. Then the reserve roll moves down into position to have the free leading end of its web of sheet material fed outwardly from the dispenser to the user.
In the embodiment illustrated, as best shown in Figures 2, 3 and
4, the core C of roll R carries a mandrel 30 frictionally held within the core C. Mandrel 30 has a flange 32 at one cnd thereof and fins 34 extendin~ outwardly from the cylindrical surfacc of mandrel 30.
These fins 34 mate with slots formcd extending outwardly through the 35 roll core C into the wound sheet material to kcy thc mandrel 30 nnd . .
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~37~ 5 roll R positively togethcr. A large cylindric~l spindle 36 is provided extending outwardly from core C on mandrel 30 at one end of the mandrel while the opposite end of the mandrel has a spindle 38. Spindle 38 is formed with a pcripheral groove 40 inwQrdly of its outermost endO
S One channel 26 has flanges 42 extending along both inner edges thereof at the upper end of this channel. Flanges 42 overlie a portion of this track 26 with the flanges extending into the groove 40 of spindle 38 when the roll R is being loaded into the dispenser. The advantage of having groove 40 to permit spindle 38 to enter the channel passing 10 throllgh the track having flanges 4~ is that proper loading of the roll within the dispenser is assured so that only one mandrel endJ namely9 the proper end of the roll~ passes downwardly into this track 26. Spindle 36 ~vithout a groove 40, at the opposite end of the roll would not be able to enter the track 26 having flMges 42 and thus the ro~l must be inserted in loading the dispenser with spindle 3~ only in the track 26 carried by wa~l 16. The keying by menns of fins 34 in the slots formed in core C and roll R is important in operation of the dispenser so that the track driving action to rotate the roll is positively transmitted to the roll for dispensing in the manner as will be described.
The lower end section of each track 26 slallts away from the longitudinal axis of the main length of the track as shown in Figures 3 and 4. These lower end sections of the two tracks are slanted rearwardly within the dispenser housing 10 and slant away from tlle axis of the feed roller described below such thnt the slanting section of each track lies on a line that is generally tangent to the periphery of the feed roller.
Each slanting section of a track 26 is formed by a stationary upper wall 4~ and a pivotalty mounted driving guide 46 pivotally mounted nt 48 to th~ lower end of the track. Each driving guide 46 provides 30 a friction surface 50 forming the lower track wnll of the slanting section guide 4&, as a whole, slanting away from the main track lcngth. The ~per end of friction surface 50 on ench guide 46 has a projection 52 with nn inclined cam aren 54 extending therenbove. Each guide 46 is biased inwardly toward the center of the track 26 by a spring 56 35 mounted on a sui~able stationary stud 58. One end of spring 5G presses ~L~1.3~3~
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against n stationary WR]l of the part forming track 26 while the other end of spring 56 engages in and presses against the outer waU of guide 46 and is held in a retainer 60 on guide 46. The bottom end wall 45 below stationary wall 44 is inclined rearwardly at a steeper angle. This
These fins 34 mate with slots formcd extending outwardly through the 35 roll core C into the wound sheet material to kcy thc mandrel 30 nnd . .
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~37~ 5 roll R positively togethcr. A large cylindric~l spindle 36 is provided extending outwardly from core C on mandrel 30 at one end of the mandrel while the opposite end of the mandrel has a spindle 38. Spindle 38 is formed with a pcripheral groove 40 inwQrdly of its outermost endO
S One channel 26 has flanges 42 extending along both inner edges thereof at the upper end of this channel. Flanges 42 overlie a portion of this track 26 with the flanges extending into the groove 40 of spindle 38 when the roll R is being loaded into the dispenser. The advantage of having groove 40 to permit spindle 38 to enter the channel passing 10 throllgh the track having flanges 4~ is that proper loading of the roll within the dispenser is assured so that only one mandrel endJ namely9 the proper end of the roll~ passes downwardly into this track 26. Spindle 36 ~vithout a groove 40, at the opposite end of the roll would not be able to enter the track 26 having flMges 42 and thus the ro~l must be inserted in loading the dispenser with spindle 3~ only in the track 26 carried by wa~l 16. The keying by menns of fins 34 in the slots formed in core C and roll R is important in operation of the dispenser so that the track driving action to rotate the roll is positively transmitted to the roll for dispensing in the manner as will be described.
The lower end section of each track 26 slallts away from the longitudinal axis of the main length of the track as shown in Figures 3 and 4. These lower end sections of the two tracks are slanted rearwardly within the dispenser housing 10 and slant away from tlle axis of the feed roller described below such thnt the slanting section of each track lies on a line that is generally tangent to the periphery of the feed roller.
Each slanting section of a track 26 is formed by a stationary upper wall 4~ and a pivotalty mounted driving guide 46 pivotally mounted nt 48 to th~ lower end of the track. Each driving guide 46 provides 30 a friction surface 50 forming the lower track wnll of the slanting section guide 4&, as a whole, slanting away from the main track lcngth. The ~per end of friction surface 50 on ench guide 46 has a projection 52 with nn inclined cam aren 54 extending therenbove. Each guide 46 is biased inwardly toward the center of the track 26 by a spring 56 35 mounted on a sui~able stationary stud 58. One end of spring 5G presses ~L~1.3~3~
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against n stationary WR]l of the part forming track 26 while the other end of spring 56 engages in and presses against the outer waU of guide 46 and is held in a retainer 60 on guide 46. The bottom end wall 45 below stationary wall 44 is inclined rearwardly at a steeper angle. This
5 wall 45 allows the spindle to pass between the feed roller and wall 45 into discard pocket P at the rear of the dispenser housing once the roll is substantially e~hausted of sheet material, as will be described in more detail hereinafter.
The driving guide 46 is normally biased by spring 56 to pivot 10 about pivot point 48 such that the guide is moved inwardly toward the center of the track 26. In this position, the inclined cam area 54 is disposed such that as the spindle moves down within traclc 2~ it will engage this cnm area, camming the driving guide 46 forwardly and allowing the spindle to move over projection 52 and into the space 15 between friction surface 50 and stationary upper wall 44. In this position the spindle rides against the friction surface 50 so that it is encouraged to rotate in a direction to unwind the sheet material from the roll.
To promote this rotation of the roll lmder the action of the perimeter of R spindle riding down along friction surface 50, the surface may be 20 provided with a coating providing a higher co-efficient of friction to more positively drive a roll spindle and roll carried thereby.
Alternatively, a material having a hi~h co-efficient of friction may be used in making the driving guide 46 to provide a higher co-efficient of friction for the surface 50.
The pivotaUy mounted driving guide 46 associated with each track 26 is preferably and advantageously pivoted on the side of the track which is in the direction toward which the web of sheet material will be drawn off of the roll incident dispensing rotation of the feed roLler mounted adjacent the lower ends of tracks 26. Where the lower sections 3û of the tracks are slanted, as illustrated and described in the preferred embodiment9 the inclined friction surface 50, forming the lower side of thc slanted track section, in and of itself, promotes the perimeter of the spindles to press ~Irmly against this surface 50 and rotnte. The pressure of the spindles agninst the stationary slanted wall 4~, which is 35 the upper wall of the slanted tro.ck section is lessened io such ' ' - " : ' ', ~ ' ;
: ,' , , ' construction.
The force of pulling the web of sheet matcrinl off of a roll in the dispensing opcration ndds a further force dra~ving thc spindles which carry the roll firmly against the inclined surface 50. Thus this force 5 furthcr also drives the roll and its spindles in moving down the inclined slanted friction surface 50 to promote rotation of the roll. Again, withdrawal of sheet ma~erial from the roll incident dispensing, while pressing the spindles more firmly against the surface of driving guides ~6, lightens or even frees engagement of the spindle perimeter from 10 the stationary wall 44.
Even where the track is straight throughout its length, without a slnnted lower section, the action of a spring biased driving guide pivotally mounted in the tr~ck lower section adjacent the upper end o~ the feed roller is advantageous. By renson of its locating such guide on the side 15 of the track 26 which is in the direction in which the web of sheet material is to be withdrawn from the roll the web withdrawing force presses the spindle against the piYotally mounted biased driving guide at the lower section of the track. This lessens or releaves the force against the opposite wall of the track which is stationary. Again, the 20 urging toward rotation of the spindles and the roll carried thereby in the direction in whicll the web is to be unwound from the roll during dispensing contributes to effective and easy dispensing of sheet material from the roL
A feed roller 62 is rotatably mounted within the dispenser housing 25 10 adjacent the lower end thereof for a roU to engage and be driven by the feed roller in dispensing sheet material from the roll. As shown, roller 62 is mounted generally beneath the main length of tracks 26 nnd is made up of several axially spaced cylindrical sections including n center section 6-~ and two end sections 66, the l~tter having their 30 outer ends closed by end caps 67. Each of the feed roller sections has a cavity therein to provide nn interior space within and along the length of the feed roller 62 which accommodntes a serrated cutting knife 68. Feed rollcr sections 64 and 66 arc slotted to proYidc an elongnted externnl opcning 70 on the periphery of the feed roller 6~.
35 Shnft ends 72 project from thc opposite cn(i caps fi7 of feed rollcr 62 , .. .. .
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to rotatably support the feed roller by each shaft end 72 engaging in a bore 74 provided in a stationarily mounted cam block 76. It is to be understood that a cam block 76 is stationarily mounted at each end of the feed roller 62, these cam blocks being affixed to and facing 5 inwardly from the opposite inner side walls 18 and 18 of chassis 14 which form a part of the dispenser housing 10.
The cam block 76 provides a plate cam therein consisting of a cam pocket 78, opening, in the case of each cam block 76, toward the end of feed ro~ler 62 with which it is associated. This pocket 78 has 1 0 ap~y~ylindrical portion with its center of curvature corresponding with the axis of bore 74 that receives shaft end 72 and also has an outwardly curved portion extending away from the axis of the feed roller 62. This latter portion is joined at its ends with the ends of the par~cylindrical portion to form pocket 78 into an endless cam 1 5 configuration.
The serrated eutting knife 68 is carried on a member 79 located within the interior space in feed roller 62, such member having cylindrical studs 80, one at eàch end of knife 68 and member 79, providing a pivot axis which is displaced from the plane of the cutting knife 68. The 20 stubs 80 are engaged in apertures provided in the opposite end caps 67 of the feed roller 62. The knife also has at each end thereof, disposed in the plane of the cutting knife 68 a cam follower 829 one such cam follower extending through an opening in each end cap 67 of the feed roller 62. The cam follower at each end of roller 62 fits into the t 25 pocket 78 of a stationary cam block 76 and thus is propelled to control extension and retraction of the cutting knife 68 out of and back into the feed roller 62 as the ro~ler rotates in dispensing sheet material from a wound roll. Incident this rotation of roller 62, knife 68 projects outwardly, piercing the web of sheet material and severing it for removal 30 of a length of the material from the dispenser through opening 24.
More detailed description of the action of the stationary cam block 76 in controlling, through cam followers 82, the projection and retraction of knife 68 will be given by referring to ~igures 15-20. It should be mentioned at this point that the disposition of the cam pocket 35 78 and the stationary cam block 76 at each end of feed ro~ler 64 is, .. . . .
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~3~3~33~i in the instant invention9 disposed to obtain a preferred action relative to other components of ~he structure which will now be described.
For ease in description of the speeific structure illustrated in Figures 15-20 the reference numerals have been given from a 100 or 5 100' series.
Referring to Figure 15 the dispenser 110' has a chassis ~12', only a part of which is shown in Figure 15. The chassis has an opening 114' at its lower forward end through which the web W of flexible sheet material, such as paper toweling, passes to be available to the user.
10 The web W is taken from a roll R mounted in the dispenser on a suitable supporting shaft 116'. The web W as withdrawn from roll R
passes over a rotatably mounted feed roller 718~ and then down and out through opening 114'. A pinch roller 120' mo~mted on a shaft 122' is spring biased into engagement with the exterior of feed roller 1I8' with 15 the web W of flexible sheet mate~ial passing between the pinch roller and the feed roll er.
The feed roller ~18' is rotatably mounted within the chassis 112~
of the dispenser on stub shaft 124 and 126 with stub shaf~ 126 carrying at its outer end a feed wheel 128. The feed wheel is secured to rotate 20 with the feed roller and function in a manner to be described in the dispersing and cutting of a length of web W removed from the roll R.
The feed roller 118' has pivotally mounted there within a knife 130, the structure of the knife being shown in Figure 18. The Icnife is mounted to swing about an axis which is laterally displaced from the ~5 plane of the cutting edge 134 of the knife. The feed roller 118' has an opening 132 formed in the periphery of the feed ro)ler so that the cutting edge 134 of the knife can be projected beyond`the exterior of the feed roller 118' and retracted back into the feed roller. P~roken line L on Pigure 15 shows the path of the projection of this cutting 30 edge 134 beyond the periphery of feed roller 118' as the roller rotates so that the web is effectively severed to enable removal of the flexible sheet material by the user.
Referring to the structure of knife 130 as best seen in Figure 18, the pivotal mounting is provided by stubs 136, one being disposed on 3S each end of the knife 130 providing a pivot axis which is displaced from 3 o~ 3r5 the plane of kniîe cutting edge 134. The knife also has at each end, disposed in the plane of the knife cutting edge, cam followers 138.
The pivot stubs 136 are mounted in the end walls 140 of the feed ro~ler 118' to support the knife 130 so as to be swingable about an axis 5 which is laterally displaced from the plane of the knife cutting edge 134. The control of movement of the knife to project from opening 132 and be retracted back into the feed roller 118' is achieved by the cam fo~lowers 138 engaging in stationary plate cams 142, one such cam being mounted within the chassis 112' adjacent each end of feed ro~ler 1 Q 118~
The configuration of each plate cam 142 is shown in Figure 17.
It has a pocket 144 of substantially uniform width throughout its length to receive one cam follower 138. ~ each case the pocket 144 opens toward the end of the feed roller 118' as . shown in Figure 16. The 15 pocket 144 in each plate cam 142 has a~ cylindrical portion 146 with its center of curvature corresponding with the axis of the feed roller 118' provided by the stub shafts 124 and 126. The pocket 144 also has ~n outwardly curved portion 148 extending away from the axis of the feed roller 118'. This latter portion is joined at its ends with the ends 20 of the Ea~cylindrical portion 146 to form pocket 144 into an endless cam configuration to actuate one cam follower 138 upon rotation of feed roller ~8'.
On Figure 15 broken line circle C shows the path of movement of the mounting stubs 136 of knif e 130 as the feed roller 118' rotates.
25 This figure also illustrates four successive positions for the axis of stubs 136 and movement of cam followers 138 within the pockets 144 of plate cams 142. As previously mentioned, the broken line L on Figure 15 shows the pattern of movement of the cutting edge 134 of knife 130 caused by the cam fo~lowers 138 being guided within the pockets 144 of 30 the plate cams 142. From this path of movement it will be seen that the cutting edge 134 starts to project bçyond the periphery of feed roller 118' immediately beyond the point of engagement of pinch roller 120' with feed roller ~18'.
Referring to Figures 19 and 20, the feed wheel 128 is shown 35 mounted on the outer end of stub shaft 126. The feed wheel is provided .
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with notches 150 spaced around its perimeter and anti-reversing pawl 152 is mounted on the chassis 112' to be freely pivotal into engagement with notches 150 to prevent reverse rotation of the feed wheel 128 and likewise feed roll er 118'.
The feed roller 118' is driven through a portion of each rotation by an over-center means including a spring 156 connected to the chassis 112' by fastener 158 and to the feed wheel 128 by screw 160, such screw 160 being off-center from the rotation axis of feed wheel 128 and feed roller 118'. It will be readily understood that during rotation of feed wheel 128 and feed roller 118t in the direction of arrow A on Figure 20, the spring 156 is initially tensioned as it approaches the position of link 162 shown on Figure 20. When the screw 160 passes beyond alignment of link 162 with stub shaft 126 the over-center means is energized to its maximum, therefore, the spring uses its stored energy to assist further rotation of the feed wheel 128 and feed roller 118' to activate the knife so that the web is severed and additional flexible sheet material is fed into position for the next use of the dispenser.
It will be noted that the center section 64 of feed roller 62 is spaced at each of its ends from the inner ends of the two end sectiarls 20 66 of such roller. These spaces, as shown more clearly on Figures 1 and 8, are provided for a purpose which will be made clear hereinafter.
Concerning the cylindrical sections 64 and 66, making up the feed roller 82, these sections may all have the peripheral surfaces thereof provided l,vith a high friction surfacing material up to the outer ringed 25 ends and end plates 67 of the end sections 66, as shown in Figures 1 and 8. For good driving characteristics in moving the wound roll within the dispenser and feeding the sheet material off of the ro~l to the dispenser outlet opening 24, the center section 64 may have a rubber surface. The exterior cylindrical surfaces of all feed ro~ler sections 30 may be made of rubber for good feeding characteristics of the sheet material.
In the instant invention, the cam pockets 78 in the stationary cam blocks 76, one at each end of the feed roller 62, preferably have their configuration disposed such that the action on cam followers 82 35 which drive the knife out and retract it back within the roller 62 ~;
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.37~3 function to project the l~nife 68 in the pattern of movements shown on Figure 7. Thus, in the instant invcntion, the knife 68 as it is initially cammed out through the opening 70 commences at a point immcdiately before the nip of feed ro~ler 62 formed in conjunction ~ith n pressure 5 roller 84. As rotation of feed roller 62 proceeds relative to the stationary cam pockets 78 in cam blocks 76, the serrated knife edge projects further and further out of the interior space within roller 62 to progress through the several projected stages as shown in phantom lines on Figure 7. While the knife is quickly projected out through the 10 opening 70 of roller 62 to effectively sever the web ~Y of sheet material the knife is also rapidly withdrawn or retracted back into the roller 62 ns it moves through the positions under the control of the configuration of cam pockets 78 within which the cam followers 82 follow.
The construction o the pressure roller 84 may best be seen in 15 the perspec tive view of Figure 8. Roller 84 is rotatably mounted in bearing blocks 86, one such bearing block receiving an end of roller 8~
at each of the roller ends. Each bearing block 86 is slideably mounted in a slot (not shown~ provided in the side walls 16 and 18 of the chassis 1~ forming a part of the dispenser housing 10. The slots in the side 20 walls 16 and 18 are oriented generally radially relative to the rotation a~is of feed roller 62, such that the pressure roller 84 may move toward and away from the axis of roller 62 provided by the ends of shaft 72 mounting such feed roller. The pressure roller 84 is spring biased toward the cylindrical surface of feed roll er 62 by the bearing blocks 86 at 25 ench end`of rolter 84 being engaged by springs 88, one at each of the pressure rollers 84, as shown in Figure 8. One end of each spring 88 presses against a bearing block 86 to urge it and pressure roller 84 cnrried thcreby toward the surface of feed roller 62. The opposite end of each spring 88 engages a stationary abutment 90, one carried by 30 each . of walls 16 and 18 wllile the mid-portion of each spring 88 is suitably supported on a stud g2, also carried by cach wall 16 and 18 (see Figures 5 and 6).
Secured to pressure roller 84 are a pair of spaced resiliently dcformable segmcnts 94. Each scgmcnt is ecccntric and resiliently 35 dcformable rclative to the roller 84 axis. In thc cmbodiment illustrated :: . , .:
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, in Figures 8 nnd 139 the resilient segment is formed by a plurality of radiating resilient fingers 96. It wi~ be seen that thcse elements rotating with pressure roller 84 move with such roller so that the outwardly projecting resilient segments 94 which are eccentric with thc 5 axis of roller 84 may pass within the spaces provided between each end of section 64 and cnd sections 66 of the feed roller 62.
Whereas in Figures 7 8 and 10-13 the resiliently dcformable segment 9d~ have been shown formed by the radiating resilient fingers 96 another embodiment which may be employed is shown in Figure 14.
10 In this embodiment tlle resiliently deformable segment is formed by an outwardly projectin~ arcuate wall 98 which is bowed outwardly from the portion of the element secured to pressure roller 84 to form the eccentric resilient deformable segment~ This arcuate wall 98 provides a surface to engage and pick up the leading free end of sheet material upon the 15 exterior of an outer roll surface in the same manner as tile resilient generally radiating fingers 98 function for the embodiment shown in Figure 13. This will be described in more detail with reference to the action shos~n being carried out in Figures lO 11 and 120 AS further shown on Figure 1~ the outwardly projecting arcuate wall 98 may be 20 reinforced by providing radial webs 100 e~tending outwardly from the axis of pressure roller 84 to the underside of arcuate wall 98.
It will be understood that the embodiments shown in Figure 13 and 14 may be appropriately made of any rubber like material which not only will give the desired frictional characteristics for the function 25 of the eccentric segments in picking up the leading free end of sheet mnterial from the exterior of a roll but also this will give the desired resiliency and deformability for effective action in use of the dispenser in feeding sheet material from a wound roll.
The pressure roller 84 also has a~ially spaced therealong resilient 30 conical portions 102. Ench conical portion 102 on roller 84 provides a cylindrical perimeter which presses against the feed roller 62 surfnce to define a nip between these two rollers. As seen from Figllre 8 the two center conical portions 102 ride ngainst the ccnter section 64 of the feed roller while the conical sections outwnrdly of the eccentric 35 scgmcnts 94. ride on the end sections 66 of feed rollcr G2. An important - :.;
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~3~33~i l~eature of Ihe location and positioning of the conical portions 102 rotnting with pressure roller 84 is thnt each conical portion faces inwflrdly toward the mid-point of pressure roller 84. This pcrforms a particular function in acting to spread out the sheet material along the length of the nip 5 between feed roller 62 and pressure roller ~4. Under the action of springs 88 at each end of pressure roller 84 the conical portions 102 tend to be deQected at the nip between the rollers so that the cylindrical perimeter is bent somewhat laterully away from the mid-point of roller 8~. By reason of the conical portions facing inwardly toward the mid-10 point of pressure roller 84 this deflection of the cylindrical perimetersof the portions 102 moves the perimeters axially outwardly which ncts on the sheet material passing between the nip of the rollers to spread it outwardly toward the ends of pressure roll er 84 thus encouraging the sheet mnterial to pass between feed roller 62 and pressure roller 84 in 15 a fully spread out, taut position.
Before considering other structures employed in effectively lending the sheet material leaving the feed roller out of the dispenser housing to be accessable to a user, discussion may be provided concerning the function of the eccentric segments 94 forming a part of pressure roller 2 0 84 as best shown on Figures 7, 10, 11 and 12.
Referring to Figure 7, a substantially exhausted initial roll ER is shown within a discard pocket P at the rear portion of the chassis 14 in ront of rear wall 20 and above bottom wall 22. This roll ER would have been the lo~Yermo~st roll loaded into the dispenser with a reserve 25 roll still located above the lowermost roll and resting on the lowermost roll surface in readiness to move into position once the lowermost roll has become substantially exhausted. Thus, roll ER, with a limited amount of sheet material still wound thereon, has moved down through the tracks 26 and, after becoming substantially exhausted, its spindles 30 have moved beneath the inclined walls 45 nt the lower ends of tracks 26 and over the surface of feed roller 62 to drop into the discard pocket P. The web of sheet material is still being fed over the top of feed roller 62 and between the nip of feed rollcr 62 and pressure roller 84 with the web W exiting through the dispenser housing opening 35 24.
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It will of course be undcrstood that while the feed roller 62 continucs its rot~tion under the action of withdr~wing web W from the opening 2~ of the dispenser housing 10, the camming action undcr the driving force of stationary cam pocke~s 78 on c~m followers 82 will S project and retract the knife 68 in accordance with the movemcnts i~lustrated on Figure 7. The projecting action of knife 68 will serve to sever a length of web ~Y for each rotation of feed roller 62 so that the cut off length of sheet material may be withdrawn from the dispenser cabinet by the intendillg user.
The structllre of pressure roller 84, incorporating spaced eccentric segments 94 nnd conical portions 102, also is advantageous in coopernting with the serrations of cutting knife 68. These knife serrations are spaced to accommodatc therebetween not only the eccentric segments 94 but also the conical resilient portions 102. This may bè seen from 15 the phantom shown position of pressure roller 84 in Figure 1. By this relationship between the cutting knife serrations and the eccentric segments 94 and conical portions 102, it Ls possible to initiate camming of the knife through the opening 70 in feed roller 62 commencing at a point im mediately before the nip of the feed and pressure ro~lers.
~0 This is of course advantageous in that when the web of sheet material is located between the two rollers, the conical portions 102 are acting to spread the sheet material along the length of the pair of rollers and the nip between the rollers holds the sheet material firmly in this spread condition. As shown in Figure 7, the projection of the knife through 25 the opening 70 immediately before the nip of the rollers permits the outermost ends of the knife serrations to pass into the web of sheet material nnd initially perforatè it Rlong the length of the pair of rollers At this time the rollers act to firmly hold the web of sheet material agflinSt displacement. As the sheet material passes on through the nip, 30 the cam action on cam followers 82 continues to move the knife 68 outwardly. ~Yhen it passes the nip betwecn rollers 62 and 84 it is rapidly projected to complete severing of the wcb of sheet material for removal from the dispensing cabinct. As previously mcntioned, the knife, under the control of thc stationary cum pocket 78, is thcn rflpidly 35 retractcd back inta the leed rollcr ~2 in re~ldiness, on the nc~t revolution , , . ~ .: .
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of such roIler, to perform a subsequent web cutting action.
At this point, shown in Figure 7, the roll that was disposed upwardly in the track as a reserve roll has moved down until in its full position its spindles are engaging with the friction surfaces 50 of 5 the driving guides 46 on the opposite side walls 16 and 18 of the chassis 14. The diameter of this reserve roll, which is now in readiness for removal of sheet material therefrom and is thus in the dispensing position, is such that it not only rests and drivingly engages with the surface of feed roller 62 but it also is of a sufficient diameter that 10 it will be engaged by the eccentric segments 94 on the pressure roller 84 as such roller rotates along with the feed ro~ler 62. As the remaining sheet material continues to be withdrawn from the substantially exhausted roll ER in the discard pocket P, it continues to rotate the rollers in passing through the nip therebetween, the withdrawing action occuring 15 either under the pull of a prospective user externally of the dispenser or manually operated by the manual hand wheel 104 as will be described subsequently.
The rotation of pressure roller 84 will carry the resiliently deformable segments 94 around to bring them into frictional contact 20 with the exterior of the fresh full roll in dispensing position which was i~m3rly disposed upwardly in the dispenser cabinet as a reserve roll.
The surface engagement of this new full roll in the dispensing position with the feed roller 62 and with rotation encouraged by its spindles frictionally engaging with the surfaces 50 on the driving guides 46 within 25 the lower section of the tracks 26 causes rotation in a direction to feed the loose free end of the sheet material onto the resilient segments 94 of the pressure roller 84.
Referring to Figures 10, 11 and 12, the action of the eccentric segments 94 on the pressure roller 84 will follow the action shown.
30 The fe~d roller 62 is rotating counterclockwise while pressure roller 84 is rotating clockwise with the web of sheet material passing between the nip of these two rollers. The clockwise rotation, as shown in Figures 10-12, has the effect as the eccentric segments 94 on the pressure roller 84 move into frictional engagement with the outer free layer of 35 roll R of buckling this free end as rotation progresses between the three .
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- ~2 -elements, as shown in Figure ll. The web ~ ut this point is still being withdrawn from the substantially e~ austed roll ER in the discard pocket P so that withdrawal of the web by a user tends to assure continued rotation of the elements, as shown in Figures l0 and ll. The buckling 5 action created by the eccentric segments 94, performing by use of resilient fingers 96 in the embodiment shown in Figures l0 and ll, carries the buckling action to R point where the buckled sheet material web is drawn positively and firmly into the nip between feed roller 62 and pressure roller 8~1. As this action proceeds, the outer free end on the 10 n~w full roll is carried in double thickness between the rollers and fed out through opening 2~ in the dispcnser housing 10. If the first brush or frictional engagement of the eccentric segments 94 on pre~ssure roller 8~ does not effectively pick up the leading free end of the fresh new fuU roll R, the elements will continue their rotation and successive 15 brushes or frictional engagements between the segments 94 and the outer lnyer of sheet material on roll R will be repeated as the remainder of sheet material is being withdrawn from the nearly exhausted ro~l ER in discard pocket P.
Once the leading free end of web sheet material on the new roll 20 in dispensing position is picked up, several thicknesses of sheet material may be fed from the dispenser for a period of time until the web slleet material on roll ER is fully exhausted. Also there may be a period ~Yhere tlle double thickness coming from the buckled surface layer of sheet material off of full ro~l R as sho~vn in Figure 12 may be fed out 25 of the dispenser nlong with the remaining material on roll ER. However, the action of eccentric segments 9~1 will effectively and positively pick up and feed sheet material into the nip between the feed roller and pressure roller from the new roll. Thus, t}liS 1'01l will be brought into operation for dispensing from the unit.
The dispenser functions in such a manner that, at the end of e~ch cycle the leading end of the sheet material extends outwnrdly of the dispenser cabinet, in ordcr to be grnsped by thc user. The mechanism for dispensing sheet material hns means for mcnsuring the length of each segment of such material thnt is dispensed and stopping the 35 dispcnsing action at thc end of this dcsired length. Also, manual fecdin~
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t ~ ~3 -is provided. The manual feeding mechnnism and associated componcnts are best shown on Figures S and 6.
The mechanism includes a manual feed wheel 104 mounted on the end of feed rollcr 62 as shown more clearly in section on Figure 1.
5 Thus, a screw 106 is threaded into the end of feed roller 62 to securely fasten the feed wheel 104 to rotate with such roller. The periphery of feed wheel 104 is provided with alternating recesses 108 and projections 110 to facilitate its rotation by the fingers of a user. Rotation of the feed wheel 104 causes the feed roller 62 to rotate and cam the knife 68 outwardly and inwardly RS previously described. A link 112 is pivotally conllected to a screw 11~ threaded into the feed whecl 104 at a point rndially offset and therefore eccentric to the axis of rotation of the wheel formed by securing screw 106. ~ spring 116 is secured to the opposite end of link 112 while the upper end of spring 116 is fastened at 1l 8 to the side wall 16 OI the chassis 14.
An Mti-reverSe pawl 120 is pivotally mounted on a screw 122 thre~qded into side wall 16 of the chassis 1~. This pawl rides in the recesses 108 of feed wheel 104 and prevents the feed wheel from rotating clockwise as shown in Figure 5 and 6.
2Q The spring 1l6~ acting through link 112, pivotally connected by screw U4 eccentrically of the rotation axis of feed wheel 104~ provides a force assist to sever the sheet material so that the act of severing the mRterial is accomplished without the need of a user increasing his pull upon the sheet material coming from the dispenser. During the first pnrt of rotntion of feed wheel 104, the spring 116 is tensioned as the wheel moves counterclockwise as shown in Figures 5 and 6. After the screw 114 passes the lowermost point, opposite its position shown in Figure 5 or 180 from the position shown in Fi~ure 5, the spring 116 pulls upwardly, thus helping to rotate manual feed wheel 104 with roller 30 62 and cam cutter 68 outwardly and then inwardly to perform the sheet material severing operation.
The foregoing sets forth a dctailed dcscription of the dispenser for wound roll fle~ible sheet material of tlle invention, wherein multiple rolls of such m~lteri~l mny bc londed into thc dispenser and each roll 35 in succcssion have its web of sheet material picked up and fed from . . -,.:: , , : : .
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the dispenser. Also, a detailed description of the cutting mechanism of the invention has been set forth, this mechanism being adapted to be used in the disclosed dispenser although it is not restricted to use solely therein. It certainly is to be recognized that various mcdifications 5 of both the dispenser and the cutting mechanism of the invention may occur to those skilled in the art. Therefore, the seope of the invention is to be limited solely by the scope of the appended claims.
The driving guide 46 is normally biased by spring 56 to pivot 10 about pivot point 48 such that the guide is moved inwardly toward the center of the track 26. In this position, the inclined cam area 54 is disposed such that as the spindle moves down within traclc 2~ it will engage this cnm area, camming the driving guide 46 forwardly and allowing the spindle to move over projection 52 and into the space 15 between friction surface 50 and stationary upper wall 44. In this position the spindle rides against the friction surface 50 so that it is encouraged to rotate in a direction to unwind the sheet material from the roll.
To promote this rotation of the roll lmder the action of the perimeter of R spindle riding down along friction surface 50, the surface may be 20 provided with a coating providing a higher co-efficient of friction to more positively drive a roll spindle and roll carried thereby.
Alternatively, a material having a hi~h co-efficient of friction may be used in making the driving guide 46 to provide a higher co-efficient of friction for the surface 50.
The pivotaUy mounted driving guide 46 associated with each track 26 is preferably and advantageously pivoted on the side of the track which is in the direction toward which the web of sheet material will be drawn off of the roll incident dispensing rotation of the feed roLler mounted adjacent the lower ends of tracks 26. Where the lower sections 3û of the tracks are slanted, as illustrated and described in the preferred embodiment9 the inclined friction surface 50, forming the lower side of thc slanted track section, in and of itself, promotes the perimeter of the spindles to press ~Irmly against this surface 50 and rotnte. The pressure of the spindles agninst the stationary slanted wall 4~, which is 35 the upper wall of the slanted tro.ck section is lessened io such ' ' - " : ' ', ~ ' ;
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The force of pulling the web of sheet matcrinl off of a roll in the dispensing opcration ndds a further force dra~ving thc spindles which carry the roll firmly against the inclined surface 50. Thus this force 5 furthcr also drives the roll and its spindles in moving down the inclined slanted friction surface 50 to promote rotation of the roll. Again, withdrawal of sheet ma~erial from the roll incident dispensing, while pressing the spindles more firmly against the surface of driving guides ~6, lightens or even frees engagement of the spindle perimeter from 10 the stationary wall 44.
Even where the track is straight throughout its length, without a slnnted lower section, the action of a spring biased driving guide pivotally mounted in the tr~ck lower section adjacent the upper end o~ the feed roller is advantageous. By renson of its locating such guide on the side 15 of the track 26 which is in the direction in which the web of sheet material is to be withdrawn from the roll the web withdrawing force presses the spindle against the piYotally mounted biased driving guide at the lower section of the track. This lessens or releaves the force against the opposite wall of the track which is stationary. Again, the 20 urging toward rotation of the spindles and the roll carried thereby in the direction in whicll the web is to be unwound from the roll during dispensing contributes to effective and easy dispensing of sheet material from the roL
A feed roller 62 is rotatably mounted within the dispenser housing 25 10 adjacent the lower end thereof for a roU to engage and be driven by the feed roller in dispensing sheet material from the roll. As shown, roller 62 is mounted generally beneath the main length of tracks 26 nnd is made up of several axially spaced cylindrical sections including n center section 6-~ and two end sections 66, the l~tter having their 30 outer ends closed by end caps 67. Each of the feed roller sections has a cavity therein to provide nn interior space within and along the length of the feed roller 62 which accommodntes a serrated cutting knife 68. Feed rollcr sections 64 and 66 arc slotted to proYidc an elongnted externnl opcning 70 on the periphery of the feed roller 6~.
35 Shnft ends 72 project from thc opposite cn(i caps fi7 of feed rollcr 62 , .. .. .
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to rotatably support the feed roller by each shaft end 72 engaging in a bore 74 provided in a stationarily mounted cam block 76. It is to be understood that a cam block 76 is stationarily mounted at each end of the feed roller 62, these cam blocks being affixed to and facing 5 inwardly from the opposite inner side walls 18 and 18 of chassis 14 which form a part of the dispenser housing 10.
The cam block 76 provides a plate cam therein consisting of a cam pocket 78, opening, in the case of each cam block 76, toward the end of feed ro~ler 62 with which it is associated. This pocket 78 has 1 0 ap~y~ylindrical portion with its center of curvature corresponding with the axis of bore 74 that receives shaft end 72 and also has an outwardly curved portion extending away from the axis of the feed roller 62. This latter portion is joined at its ends with the ends of the par~cylindrical portion to form pocket 78 into an endless cam 1 5 configuration.
The serrated eutting knife 68 is carried on a member 79 located within the interior space in feed roller 62, such member having cylindrical studs 80, one at eàch end of knife 68 and member 79, providing a pivot axis which is displaced from the plane of the cutting knife 68. The 20 stubs 80 are engaged in apertures provided in the opposite end caps 67 of the feed roller 62. The knife also has at each end thereof, disposed in the plane of the cutting knife 68 a cam follower 829 one such cam follower extending through an opening in each end cap 67 of the feed roller 62. The cam follower at each end of roller 62 fits into the t 25 pocket 78 of a stationary cam block 76 and thus is propelled to control extension and retraction of the cutting knife 68 out of and back into the feed roller 62 as the ro~ler rotates in dispensing sheet material from a wound roll. Incident this rotation of roller 62, knife 68 projects outwardly, piercing the web of sheet material and severing it for removal 30 of a length of the material from the dispenser through opening 24.
More detailed description of the action of the stationary cam block 76 in controlling, through cam followers 82, the projection and retraction of knife 68 will be given by referring to ~igures 15-20. It should be mentioned at this point that the disposition of the cam pocket 35 78 and the stationary cam block 76 at each end of feed ro~ler 64 is, .. . . .
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~3~3~33~i in the instant invention9 disposed to obtain a preferred action relative to other components of ~he structure which will now be described.
For ease in description of the speeific structure illustrated in Figures 15-20 the reference numerals have been given from a 100 or 5 100' series.
Referring to Figure 15 the dispenser 110' has a chassis ~12', only a part of which is shown in Figure 15. The chassis has an opening 114' at its lower forward end through which the web W of flexible sheet material, such as paper toweling, passes to be available to the user.
10 The web W is taken from a roll R mounted in the dispenser on a suitable supporting shaft 116'. The web W as withdrawn from roll R
passes over a rotatably mounted feed roller 718~ and then down and out through opening 114'. A pinch roller 120' mo~mted on a shaft 122' is spring biased into engagement with the exterior of feed roller 1I8' with 15 the web W of flexible sheet mate~ial passing between the pinch roller and the feed roll er.
The feed roller ~18' is rotatably mounted within the chassis 112~
of the dispenser on stub shaft 124 and 126 with stub shaf~ 126 carrying at its outer end a feed wheel 128. The feed wheel is secured to rotate 20 with the feed roller and function in a manner to be described in the dispersing and cutting of a length of web W removed from the roll R.
The feed roller 118' has pivotally mounted there within a knife 130, the structure of the knife being shown in Figure 18. The Icnife is mounted to swing about an axis which is laterally displaced from the ~5 plane of the cutting edge 134 of the knife. The feed roller 118' has an opening 132 formed in the periphery of the feed ro)ler so that the cutting edge 134 of the knife can be projected beyond`the exterior of the feed roller 118' and retracted back into the feed roller. P~roken line L on Pigure 15 shows the path of the projection of this cutting 30 edge 134 beyond the periphery of feed roller 118' as the roller rotates so that the web is effectively severed to enable removal of the flexible sheet material by the user.
Referring to the structure of knife 130 as best seen in Figure 18, the pivotal mounting is provided by stubs 136, one being disposed on 3S each end of the knife 130 providing a pivot axis which is displaced from 3 o~ 3r5 the plane of kniîe cutting edge 134. The knife also has at each end, disposed in the plane of the knife cutting edge, cam followers 138.
The pivot stubs 136 are mounted in the end walls 140 of the feed ro~ler 118' to support the knife 130 so as to be swingable about an axis 5 which is laterally displaced from the plane of the knife cutting edge 134. The control of movement of the knife to project from opening 132 and be retracted back into the feed roller 118' is achieved by the cam fo~lowers 138 engaging in stationary plate cams 142, one such cam being mounted within the chassis 112' adjacent each end of feed ro~ler 1 Q 118~
The configuration of each plate cam 142 is shown in Figure 17.
It has a pocket 144 of substantially uniform width throughout its length to receive one cam follower 138. ~ each case the pocket 144 opens toward the end of the feed roller 118' as . shown in Figure 16. The 15 pocket 144 in each plate cam 142 has a~ cylindrical portion 146 with its center of curvature corresponding with the axis of the feed roller 118' provided by the stub shafts 124 and 126. The pocket 144 also has ~n outwardly curved portion 148 extending away from the axis of the feed roller 118'. This latter portion is joined at its ends with the ends 20 of the Ea~cylindrical portion 146 to form pocket 144 into an endless cam configuration to actuate one cam follower 138 upon rotation of feed roller ~8'.
On Figure 15 broken line circle C shows the path of movement of the mounting stubs 136 of knif e 130 as the feed roller 118' rotates.
25 This figure also illustrates four successive positions for the axis of stubs 136 and movement of cam followers 138 within the pockets 144 of plate cams 142. As previously mentioned, the broken line L on Figure 15 shows the pattern of movement of the cutting edge 134 of knife 130 caused by the cam fo~lowers 138 being guided within the pockets 144 of 30 the plate cams 142. From this path of movement it will be seen that the cutting edge 134 starts to project bçyond the periphery of feed roller 118' immediately beyond the point of engagement of pinch roller 120' with feed roller ~18'.
Referring to Figures 19 and 20, the feed wheel 128 is shown 35 mounted on the outer end of stub shaft 126. The feed wheel is provided .
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with notches 150 spaced around its perimeter and anti-reversing pawl 152 is mounted on the chassis 112' to be freely pivotal into engagement with notches 150 to prevent reverse rotation of the feed wheel 128 and likewise feed roll er 118'.
The feed roller 118' is driven through a portion of each rotation by an over-center means including a spring 156 connected to the chassis 112' by fastener 158 and to the feed wheel 128 by screw 160, such screw 160 being off-center from the rotation axis of feed wheel 128 and feed roller 118'. It will be readily understood that during rotation of feed wheel 128 and feed roller 118t in the direction of arrow A on Figure 20, the spring 156 is initially tensioned as it approaches the position of link 162 shown on Figure 20. When the screw 160 passes beyond alignment of link 162 with stub shaft 126 the over-center means is energized to its maximum, therefore, the spring uses its stored energy to assist further rotation of the feed wheel 128 and feed roller 118' to activate the knife so that the web is severed and additional flexible sheet material is fed into position for the next use of the dispenser.
It will be noted that the center section 64 of feed roller 62 is spaced at each of its ends from the inner ends of the two end sectiarls 20 66 of such roller. These spaces, as shown more clearly on Figures 1 and 8, are provided for a purpose which will be made clear hereinafter.
Concerning the cylindrical sections 64 and 66, making up the feed roller 82, these sections may all have the peripheral surfaces thereof provided l,vith a high friction surfacing material up to the outer ringed 25 ends and end plates 67 of the end sections 66, as shown in Figures 1 and 8. For good driving characteristics in moving the wound roll within the dispenser and feeding the sheet material off of the ro~l to the dispenser outlet opening 24, the center section 64 may have a rubber surface. The exterior cylindrical surfaces of all feed ro~ler sections 30 may be made of rubber for good feeding characteristics of the sheet material.
In the instant invention, the cam pockets 78 in the stationary cam blocks 76, one at each end of the feed roller 62, preferably have their configuration disposed such that the action on cam followers 82 35 which drive the knife out and retract it back within the roller 62 ~;
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.37~3 function to project the l~nife 68 in the pattern of movements shown on Figure 7. Thus, in the instant invcntion, the knife 68 as it is initially cammed out through the opening 70 commences at a point immcdiately before the nip of feed ro~ler 62 formed in conjunction ~ith n pressure 5 roller 84. As rotation of feed roller 62 proceeds relative to the stationary cam pockets 78 in cam blocks 76, the serrated knife edge projects further and further out of the interior space within roller 62 to progress through the several projected stages as shown in phantom lines on Figure 7. While the knife is quickly projected out through the 10 opening 70 of roller 62 to effectively sever the web ~Y of sheet material the knife is also rapidly withdrawn or retracted back into the roller 62 ns it moves through the positions under the control of the configuration of cam pockets 78 within which the cam followers 82 follow.
The construction o the pressure roller 84 may best be seen in 15 the perspec tive view of Figure 8. Roller 84 is rotatably mounted in bearing blocks 86, one such bearing block receiving an end of roller 8~
at each of the roller ends. Each bearing block 86 is slideably mounted in a slot (not shown~ provided in the side walls 16 and 18 of the chassis 1~ forming a part of the dispenser housing 10. The slots in the side 20 walls 16 and 18 are oriented generally radially relative to the rotation a~is of feed roller 62, such that the pressure roller 84 may move toward and away from the axis of roller 62 provided by the ends of shaft 72 mounting such feed roller. The pressure roller 84 is spring biased toward the cylindrical surface of feed roll er 62 by the bearing blocks 86 at 25 ench end`of rolter 84 being engaged by springs 88, one at each of the pressure rollers 84, as shown in Figure 8. One end of each spring 88 presses against a bearing block 86 to urge it and pressure roller 84 cnrried thcreby toward the surface of feed roller 62. The opposite end of each spring 88 engages a stationary abutment 90, one carried by 30 each . of walls 16 and 18 wllile the mid-portion of each spring 88 is suitably supported on a stud g2, also carried by cach wall 16 and 18 (see Figures 5 and 6).
Secured to pressure roller 84 are a pair of spaced resiliently dcformable segmcnts 94. Each scgmcnt is ecccntric and resiliently 35 dcformable rclative to the roller 84 axis. In thc cmbodiment illustrated :: . , .:
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, in Figures 8 nnd 139 the resilient segment is formed by a plurality of radiating resilient fingers 96. It wi~ be seen that thcse elements rotating with pressure roller 84 move with such roller so that the outwardly projecting resilient segments 94 which are eccentric with thc 5 axis of roller 84 may pass within the spaces provided between each end of section 64 and cnd sections 66 of the feed roller 62.
Whereas in Figures 7 8 and 10-13 the resiliently dcformable segment 9d~ have been shown formed by the radiating resilient fingers 96 another embodiment which may be employed is shown in Figure 14.
10 In this embodiment tlle resiliently deformable segment is formed by an outwardly projectin~ arcuate wall 98 which is bowed outwardly from the portion of the element secured to pressure roller 84 to form the eccentric resilient deformable segment~ This arcuate wall 98 provides a surface to engage and pick up the leading free end of sheet material upon the 15 exterior of an outer roll surface in the same manner as tile resilient generally radiating fingers 98 function for the embodiment shown in Figure 13. This will be described in more detail with reference to the action shos~n being carried out in Figures lO 11 and 120 AS further shown on Figure 1~ the outwardly projecting arcuate wall 98 may be 20 reinforced by providing radial webs 100 e~tending outwardly from the axis of pressure roller 84 to the underside of arcuate wall 98.
It will be understood that the embodiments shown in Figure 13 and 14 may be appropriately made of any rubber like material which not only will give the desired frictional characteristics for the function 25 of the eccentric segments in picking up the leading free end of sheet mnterial from the exterior of a roll but also this will give the desired resiliency and deformability for effective action in use of the dispenser in feeding sheet material from a wound roll.
The pressure roller 84 also has a~ially spaced therealong resilient 30 conical portions 102. Ench conical portion 102 on roller 84 provides a cylindrical perimeter which presses against the feed roller 62 surfnce to define a nip between these two rollers. As seen from Figllre 8 the two center conical portions 102 ride ngainst the ccnter section 64 of the feed roller while the conical sections outwnrdly of the eccentric 35 scgmcnts 94. ride on the end sections 66 of feed rollcr G2. An important - :.;
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~3~33~i l~eature of Ihe location and positioning of the conical portions 102 rotnting with pressure roller 84 is thnt each conical portion faces inwflrdly toward the mid-point of pressure roller 84. This pcrforms a particular function in acting to spread out the sheet material along the length of the nip 5 between feed roller 62 and pressure roller ~4. Under the action of springs 88 at each end of pressure roller 84 the conical portions 102 tend to be deQected at the nip between the rollers so that the cylindrical perimeter is bent somewhat laterully away from the mid-point of roller 8~. By reason of the conical portions facing inwardly toward the mid-10 point of pressure roller 84 this deflection of the cylindrical perimetersof the portions 102 moves the perimeters axially outwardly which ncts on the sheet material passing between the nip of the rollers to spread it outwardly toward the ends of pressure roll er 84 thus encouraging the sheet mnterial to pass between feed roller 62 and pressure roller 84 in 15 a fully spread out, taut position.
Before considering other structures employed in effectively lending the sheet material leaving the feed roller out of the dispenser housing to be accessable to a user, discussion may be provided concerning the function of the eccentric segments 94 forming a part of pressure roller 2 0 84 as best shown on Figures 7, 10, 11 and 12.
Referring to Figure 7, a substantially exhausted initial roll ER is shown within a discard pocket P at the rear portion of the chassis 14 in ront of rear wall 20 and above bottom wall 22. This roll ER would have been the lo~Yermo~st roll loaded into the dispenser with a reserve 25 roll still located above the lowermost roll and resting on the lowermost roll surface in readiness to move into position once the lowermost roll has become substantially exhausted. Thus, roll ER, with a limited amount of sheet material still wound thereon, has moved down through the tracks 26 and, after becoming substantially exhausted, its spindles 30 have moved beneath the inclined walls 45 nt the lower ends of tracks 26 and over the surface of feed roller 62 to drop into the discard pocket P. The web of sheet material is still being fed over the top of feed roller 62 and between the nip of feed rollcr 62 and pressure roller 84 with the web W exiting through the dispenser housing opening 35 24.
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It will of course be undcrstood that while the feed roller 62 continucs its rot~tion under the action of withdr~wing web W from the opening 2~ of the dispenser housing 10, the camming action undcr the driving force of stationary cam pocke~s 78 on c~m followers 82 will S project and retract the knife 68 in accordance with the movemcnts i~lustrated on Figure 7. The projecting action of knife 68 will serve to sever a length of web ~Y for each rotation of feed roller 62 so that the cut off length of sheet material may be withdrawn from the dispenser cabinet by the intendillg user.
The structllre of pressure roller 84, incorporating spaced eccentric segments 94 nnd conical portions 102, also is advantageous in coopernting with the serrations of cutting knife 68. These knife serrations are spaced to accommodatc therebetween not only the eccentric segments 94 but also the conical resilient portions 102. This may bè seen from 15 the phantom shown position of pressure roller 84 in Figure 1. By this relationship between the cutting knife serrations and the eccentric segments 94 and conical portions 102, it Ls possible to initiate camming of the knife through the opening 70 in feed roller 62 commencing at a point im mediately before the nip of the feed and pressure ro~lers.
~0 This is of course advantageous in that when the web of sheet material is located between the two rollers, the conical portions 102 are acting to spread the sheet material along the length of the pair of rollers and the nip between the rollers holds the sheet material firmly in this spread condition. As shown in Figure 7, the projection of the knife through 25 the opening 70 immediately before the nip of the rollers permits the outermost ends of the knife serrations to pass into the web of sheet material nnd initially perforatè it Rlong the length of the pair of rollers At this time the rollers act to firmly hold the web of sheet material agflinSt displacement. As the sheet material passes on through the nip, 30 the cam action on cam followers 82 continues to move the knife 68 outwardly. ~Yhen it passes the nip betwecn rollers 62 and 84 it is rapidly projected to complete severing of the wcb of sheet material for removal from the dispensing cabinct. As previously mcntioned, the knife, under the control of thc stationary cum pocket 78, is thcn rflpidly 35 retractcd back inta the leed rollcr ~2 in re~ldiness, on the nc~t revolution , , . ~ .: .
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~3~3~
of such roIler, to perform a subsequent web cutting action.
At this point, shown in Figure 7, the roll that was disposed upwardly in the track as a reserve roll has moved down until in its full position its spindles are engaging with the friction surfaces 50 of 5 the driving guides 46 on the opposite side walls 16 and 18 of the chassis 14. The diameter of this reserve roll, which is now in readiness for removal of sheet material therefrom and is thus in the dispensing position, is such that it not only rests and drivingly engages with the surface of feed roller 62 but it also is of a sufficient diameter that 10 it will be engaged by the eccentric segments 94 on the pressure roller 84 as such roller rotates along with the feed ro~ler 62. As the remaining sheet material continues to be withdrawn from the substantially exhausted roll ER in the discard pocket P, it continues to rotate the rollers in passing through the nip therebetween, the withdrawing action occuring 15 either under the pull of a prospective user externally of the dispenser or manually operated by the manual hand wheel 104 as will be described subsequently.
The rotation of pressure roller 84 will carry the resiliently deformable segments 94 around to bring them into frictional contact 20 with the exterior of the fresh full roll in dispensing position which was i~m3rly disposed upwardly in the dispenser cabinet as a reserve roll.
The surface engagement of this new full roll in the dispensing position with the feed roller 62 and with rotation encouraged by its spindles frictionally engaging with the surfaces 50 on the driving guides 46 within 25 the lower section of the tracks 26 causes rotation in a direction to feed the loose free end of the sheet material onto the resilient segments 94 of the pressure roller 84.
Referring to Figures 10, 11 and 12, the action of the eccentric segments 94 on the pressure roller 84 will follow the action shown.
30 The fe~d roller 62 is rotating counterclockwise while pressure roller 84 is rotating clockwise with the web of sheet material passing between the nip of these two rollers. The clockwise rotation, as shown in Figures 10-12, has the effect as the eccentric segments 94 on the pressure roller 84 move into frictional engagement with the outer free layer of 35 roll R of buckling this free end as rotation progresses between the three .
.
" .,: ~ :
3~
- ~2 -elements, as shown in Figure ll. The web ~ ut this point is still being withdrawn from the substantially e~ austed roll ER in the discard pocket P so that withdrawal of the web by a user tends to assure continued rotation of the elements, as shown in Figures l0 and ll. The buckling 5 action created by the eccentric segments 94, performing by use of resilient fingers 96 in the embodiment shown in Figures l0 and ll, carries the buckling action to R point where the buckled sheet material web is drawn positively and firmly into the nip between feed roller 62 and pressure roller 8~1. As this action proceeds, the outer free end on the 10 n~w full roll is carried in double thickness between the rollers and fed out through opening 2~ in the dispcnser housing 10. If the first brush or frictional engagement of the eccentric segments 94 on pre~ssure roller 8~ does not effectively pick up the leading free end of the fresh new fuU roll R, the elements will continue their rotation and successive 15 brushes or frictional engagements between the segments 94 and the outer lnyer of sheet material on roll R will be repeated as the remainder of sheet material is being withdrawn from the nearly exhausted ro~l ER in discard pocket P.
Once the leading free end of web sheet material on the new roll 20 in dispensing position is picked up, several thicknesses of sheet material may be fed from the dispenser for a period of time until the web slleet material on roll ER is fully exhausted. Also there may be a period ~Yhere tlle double thickness coming from the buckled surface layer of sheet material off of full ro~l R as sho~vn in Figure 12 may be fed out 25 of the dispenser nlong with the remaining material on roll ER. However, the action of eccentric segments 9~1 will effectively and positively pick up and feed sheet material into the nip between the feed roller and pressure roller from the new roll. Thus, t}liS 1'01l will be brought into operation for dispensing from the unit.
The dispenser functions in such a manner that, at the end of e~ch cycle the leading end of the sheet material extends outwnrdly of the dispenser cabinet, in ordcr to be grnsped by thc user. The mechanism for dispensing sheet material hns means for mcnsuring the length of each segment of such material thnt is dispensed and stopping the 35 dispcnsing action at thc end of this dcsired length. Also, manual fecdin~
~` :
. . .
. . . . . . . . . .
. .
t ~ ~3 -is provided. The manual feeding mechnnism and associated componcnts are best shown on Figures S and 6.
The mechanism includes a manual feed wheel 104 mounted on the end of feed rollcr 62 as shown more clearly in section on Figure 1.
5 Thus, a screw 106 is threaded into the end of feed roller 62 to securely fasten the feed wheel 104 to rotate with such roller. The periphery of feed wheel 104 is provided with alternating recesses 108 and projections 110 to facilitate its rotation by the fingers of a user. Rotation of the feed wheel 104 causes the feed roller 62 to rotate and cam the knife 68 outwardly and inwardly RS previously described. A link 112 is pivotally conllected to a screw 11~ threaded into the feed whecl 104 at a point rndially offset and therefore eccentric to the axis of rotation of the wheel formed by securing screw 106. ~ spring 116 is secured to the opposite end of link 112 while the upper end of spring 116 is fastened at 1l 8 to the side wall 16 OI the chassis 14.
An Mti-reverSe pawl 120 is pivotally mounted on a screw 122 thre~qded into side wall 16 of the chassis 1~. This pawl rides in the recesses 108 of feed wheel 104 and prevents the feed wheel from rotating clockwise as shown in Figure 5 and 6.
2Q The spring 1l6~ acting through link 112, pivotally connected by screw U4 eccentrically of the rotation axis of feed wheel 104~ provides a force assist to sever the sheet material so that the act of severing the mRterial is accomplished without the need of a user increasing his pull upon the sheet material coming from the dispenser. During the first pnrt of rotntion of feed wheel 104, the spring 116 is tensioned as the wheel moves counterclockwise as shown in Figures 5 and 6. After the screw 114 passes the lowermost point, opposite its position shown in Figure 5 or 180 from the position shown in Fi~ure 5, the spring 116 pulls upwardly, thus helping to rotate manual feed wheel 104 with roller 30 62 and cam cutter 68 outwardly and then inwardly to perform the sheet material severing operation.
The foregoing sets forth a dctailed dcscription of the dispenser for wound roll fle~ible sheet material of tlle invention, wherein multiple rolls of such m~lteri~l mny bc londed into thc dispenser and each roll 35 in succcssion have its web of sheet material picked up and fed from . . -,.:: , , : : .
~: : , , :: :
.~
~3.~
the dispenser. Also, a detailed description of the cutting mechanism of the invention has been set forth, this mechanism being adapted to be used in the disclosed dispenser although it is not restricted to use solely therein. It certainly is to be recognized that various mcdifications 5 of both the dispenser and the cutting mechanism of the invention may occur to those skilled in the art. Therefore, the seope of the invention is to be limited solely by the scope of the appended claims.
Claims (3)
1. A dispenser for wound rolls of flexible sheet material comprising; a housing, means mounted within said housing for rotatably supporting a roll therein, a feed roller rotatably mounted within said housing, and a pressure roller rotatably mounted within said housing and engaging said feed roller, said feed and pressure rollers defining a nip therebetween through which sheet material passes; characterized by said pressure roller including means at spaced apart locations along the length of said pressure roller for urging the sheet material axially outwardly of said feed roller to spread the material along the surface of said feed roller as the material passes through said nip.
2. A dispenser as recited in claim 1, wherein said urging means comprises a plurality of resilient, spaced, substantially conical portions positioned along the length of said pressure roller with the apex end of each of said portions oriented toward the axially central, transverse mid-plane of said pressure roller and the periphery of each of said portions engaging the periphery of said feed roller.
3. A dispenser as recited in claim 1, wherein said pressure roller further includes means for picking up the leading free end of the sheet material on a full roll engaging said pressure roller to carry said free end into said nip.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/842,533 US4188844A (en) | 1977-10-14 | 1977-10-14 | Dispenser for rolls of flexible sheet material and cutter mechanism for use therein |
| US842,533 | 1977-10-14 | ||
| US89743178A | 1978-04-18 | 1978-04-18 | |
| US897,431 | 1978-04-18 | ||
| CA313,451A CA1115668A (en) | 1977-10-14 | 1978-10-13 | Multiple wound roll dispenser and cutter mechanism for use therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1137935A true CA1137935A (en) | 1982-12-21 |
Family
ID=27165906
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000354532A Expired CA1153740A (en) | 1977-10-14 | 1980-06-20 | Positively cammed roller housed cutting mechanism for rolled web dispensers |
| CA354,534A Expired CA1127603A (en) | 1977-10-14 | 1980-06-20 | One way mountable key driven web roll |
| CA354,531A Expired CA1127602A (en) | 1977-10-14 | 1980-06-20 | Multiple wound roll dispenser and cutter mechanism for use therein |
| CA000354533A Expired CA1137935A (en) | 1977-10-14 | 1980-06-20 | Axial web spreading means for wound roll sheet dispensers |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000354532A Expired CA1153740A (en) | 1977-10-14 | 1980-06-20 | Positively cammed roller housed cutting mechanism for rolled web dispensers |
| CA354,534A Expired CA1127603A (en) | 1977-10-14 | 1980-06-20 | One way mountable key driven web roll |
| CA354,531A Expired CA1127602A (en) | 1977-10-14 | 1980-06-20 | Multiple wound roll dispenser and cutter mechanism for use therein |
Country Status (1)
| Country | Link |
|---|---|
| CA (4) | CA1153740A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD417109S (en) | 1998-02-02 | 1999-11-30 | Fort James Corporation | Sheet material dispenser |
| US6228454B1 (en) | 1998-02-02 | 2001-05-08 | Fort James Corporation | Sheet material having weakness zones and a system for dispensing the material |
| US6321963B1 (en) | 1998-02-02 | 2001-11-27 | Fort James Corporation | Sheet material dispensing apparatus and method |
-
1980
- 1980-06-20 CA CA000354532A patent/CA1153740A/en not_active Expired
- 1980-06-20 CA CA354,534A patent/CA1127603A/en not_active Expired
- 1980-06-20 CA CA354,531A patent/CA1127602A/en not_active Expired
- 1980-06-20 CA CA000354533A patent/CA1137935A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD417109S (en) | 1998-02-02 | 1999-11-30 | Fort James Corporation | Sheet material dispenser |
| US6228454B1 (en) | 1998-02-02 | 2001-05-08 | Fort James Corporation | Sheet material having weakness zones and a system for dispensing the material |
| US6321963B1 (en) | 1998-02-02 | 2001-11-27 | Fort James Corporation | Sheet material dispensing apparatus and method |
| US6412678B2 (en) | 1998-02-02 | 2002-07-02 | Fort James Corporation | Sheet material dispensing apparatus and method |
| US6447864B2 (en) | 1998-02-02 | 2002-09-10 | Fort James Corporation | Sheet material having weakness zones and a system for dispensing the material |
| US6464120B1 (en) | 1998-02-02 | 2002-10-15 | Fort James Corporation | Sheet material having weakness zones and a system for dispensing the material |
| US6536624B2 (en) | 1998-02-02 | 2003-03-25 | Fort James Corporation | Sheet material having weakness zones and a system for dispensing the material |
| US6685074B2 (en) | 1998-02-02 | 2004-02-03 | Fort James Corporation | Sheet material dispensing apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1127602A (en) | 1982-07-13 |
| CA1153740A (en) | 1983-09-13 |
| CA1127603A (en) | 1982-07-13 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |