CA1253230A - Arrangement for monitoring and controlling webs in packaging machines - Google Patents
Arrangement for monitoring and controlling webs in packaging machinesInfo
- Publication number
- CA1253230A CA1253230A CA000467002A CA467002A CA1253230A CA 1253230 A CA1253230 A CA 1253230A CA 000467002 A CA000467002 A CA 000467002A CA 467002 A CA467002 A CA 467002A CA 1253230 A CA1253230 A CA 1253230A
- Authority
- CA
- Canada
- Prior art keywords
- web
- receiving means
- light
- transmitting
- receiving
- 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
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
- B65H23/0204—Sensing transverse register of web
- B65H23/0216—Sensing transverse register of web with an element utilising photoelectric effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B57/00—Automatic control, checking, warning, or safety devices
- B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
- B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
Abstract
Abstract (in conjunction with Figure 1) During the monitoring of a web (10), especially a sheet of packaging material (foil), (photoelectric) sen-sors are used for monitoring the material and positioning.
These are accommodated in or on a housing (12) which can be handled as an independent unit. Several monitoring systems for sensing different features of the web (10) or of a tear-open strip (25) are provided in the housing on both sides of a slit (13) open on one side.
These are accommodated in or on a housing (12) which can be handled as an independent unit. Several monitoring systems for sensing different features of the web (10) or of a tear-open strip (25) are provided in the housing on both sides of a slit (13) open on one side.
Description
i;~S3Z30 Descr;pt;on The ;nvention relates to an arrangement for moni-toring and controlling webs of packaging material or the like in respect of material and positiona~ defects, especially on packaging machines, ~ith sensors, preferab~y photoelectric transmitters and rece;vers, for sensing the continuous ~eb.
In connection ~ith packaging machines, it is neces-sary to monitor ~ebs of materia~, especia~Ly ~ebs of packaging materiaL. On the one hand, it is important to identify material defects, for example holes and tears, but also ~eb joins made by adhesive tape, etc. ~hen de-fects of this type are detected, one or more packs, espec-ially cigarette packs, produced from ~he packaging material having these defects are separated out. Ho~ever, ;t is also necessary, furthermore, to monitor the run of the ~eb of material, that is to say its relative position.
When there are deviations from the desired positions, the sheet is adjusted into the correct direction of movement by suitable adjusting members.
A monitoring and control arrangement of this type is described in EP-A-25,563. In th;s kno~n proposal, a reeL carrier has assigned to ;t a photoelectric sensing device ~hich consists of two sensor bars arranged at a distance from one another. The ~eb of packaging material runs through bet~een these in such a way that a ro~ of sensors arranged at a slight distance from one another ex-tends on each of the t~a sides of the ~eb. Furthermore, i~
lZ~3Z30 there are on each sensor bar t~o lateral sensors (trans-mitter and rece;ver) wh;ch sense the side edges of the sheet and which detect any skewing~ In the known device, these last-mentioned sensors or any error signals are used to actuate a servo-motor which correctly adjusts the reel or reel mounting.
Although the known arrangement is suitabLe for monitoring material and positional defects in a web of material, nevertheless it involves a relatively high out-lay in terms of construction and handling.
The object on which the invention is based is to propose an arrangement for monitoring material and posi-tional defects in or on ~ebs, ~hich ;s simple and inex-pensive in terms of construction, but which is neverthe-less reliable to operate.
To achieve this object, the arrangement according to the invention is defined by at least two sensors or groups of sensors, independent of one another, for sensing several material and production features of the web.
In the preferred embodiment of the invention, there are t~o groups of sensors which can be activated in-dependently of one another. A first group of only two sensors, namely a transmitter and receiver, serYes for ~oni-toring the material quality of the web. In this case, the transmitter is preferably designed as a light transmit-ter tinfrared light transmitter) and the receiver is de-signed as a photodiode. The web is conveyed through between the transmitter and receiver, changes in the in-tens;ty of the received light being recorded by the re-ceiver, for example thicker or thinner portions of mater-;al, tearing, adhesive tape for joining the ends of ~ebs connected to one another, etc. The error signal generated by the rece;ver is used to separate out one or more packs from the region of the defective web.
According eO the invention, a group of ~urther sensors, in particular a transmitter and two receivers arranged at a distance from one another, serves for moni-toring a strip of material (foil tear-open strip) applied to the web. In this case, the receivers are arranged at _ 3 _ 1 ~ ~ 3~ 3V
a d;stance from one another ~h;ch is less than the width of the fo;l tear-open str;p, so that the two rece;vers are covered by the latter. In the event that the str;p deviates from the normal position, more l;ght ;s suppl;ed to one sensor or the other, and an error s;gnal is der;ved from th;s.
Accord;ng to~the invent;on, this group of sensors has a further function, namely to monitor the relat;ve position of the packag;ng blanlcs wh;ch, together with the str;p of materiaL, are severed from the web. For this purpose, each foil tear-open strip is provided with a mark;ng (colored d;st;ngu;shing mark) ~hich is sensed ;n respect of its relative position by the sensors. A change ;ri its position also means an undes;rable change ;n the relative pos;t;on of the blank.
According to a further proposal of the ;nvent;on, these and, if appropr;ate, further sensors are arranged ;n or on a common un;tary holder wh;ch ;s U-shaped. The sen-sors (transm;tters and receivers) located oppos;te one another are arranged on (horizontally) d;rected legs, the web being conveyed through between the sensors ;n the reg;on of a slit open on one s;de. These sensors are attached to a common U-shaped board as a carr;er.
A mon;tor;ng arrangement des;gned ;n th;s way is s;mple to handle, ;n particular simple to assemble and, if necessary, exchange. The complete arrangement is designed as a saleabLe and handy unit.
Further features of the invention relate to the constructive design of the monitoring arrangement and to ;ts members.
Exemplary embod;ments of the invention are ex-plained ;n more de~ail below ~ith reference to the drawings ;n wh;ch:
Figure 1 shows, in a side view, a unit for monitoring webs, w;th mon;tor;ng members shown d;agrammatically, Figure 2 sho~s the unit according to Figure 1 in an end view, together with the ~eb, on 3 reduced scale, Figure 3 shows a plan view relating to figure 2, `` i25~3~
_ 4 Figure 4 shows an illustrat;on corresponding to Figure 3 and of another exemplary embodiment.
The exemplary embodiment of a monitoring and con-trol un;t, illustrated in the drawings, is particularly suitable in conjunction ~ith packaging machines, preferably cigarette-packaging machines. A web 10 consisting, for example of a plastic foil and fed continuously to the pack-aging machine or a packaging unit (for example, a foil apparatus) is to be sensed as regards its relative posi-tion, defects, etc. The defects include irregularities in the material quality of the ~eb 10 (holes, tears, unde-sirable thickened portions~, as ~ell as transverse adhesive tapes 11 for joining the ends of successive ~ebs 10.
The monitoring arrangement consists of or is accom-modated comoletely in a separate housing 1Z. This unit, ~hich is approximately rectangu~ar or cuboid in the pre-sent case, can be installed complete in or on the packaging machine and exchanged if necessary.
The housing 12 forms a slit 13 which is off-center here and which is open at one edge. By means of-~his slit, the housing 12 acquires an essentially U-shaped form with legs 14 and 15 and a cross-piece 16 connect;ng these to one another on one side. The web 10 runs through the slit 13 transversely to the longitudinaL extension of the housing 12, preferably in a horizontal plane. The monitoring members, in particular optical or photoelectric sensors as we~l as indicator members and the electronic and electro-technical devices, are accommodated in the U-shaped housing 12 or the housing designed with the slit 13 open on one side. The main carrier of these members is a board 17 which is U-shaped or designed ~ith a slit 13. On the edge of this board, in particular follo~ing the contours, is formed a transverse ~all 18 which ex~ends all round. This 3LsO limits the slit 13 on both sides of the latter. Cover-;ng ~alls 19 which are part of the closed housing 12 are appropriately attached on the outside.
In the preferred exemplary embodiments illustrated here, the ~eb 10 is sensed for any material defects by a first monitoring system ~hich consists of a transmitter 20 _ 5 _ 1 2 S 32 30 on one side of the slit 13 and consequently of the web 10 and a receiver 21 on the other side. A test med;um is emitted by the transmitter 20, preferably a pulsating infrar-ed light ~hich, after passing through the web 10, is received by the receiver 21n Changes in the radiation or light intensity result in an appropriate evaluation by evaluation electronics located after the r~ece;ver 21 and, if appropriate, in an error signaL be;ng generated. In the region of the ~upper and lower) transverse wall 18, the infrared light is conveyed respectively through plane windows 22 and 23 within this transverse ~all. An ampLi-fier 24 ;s connected after the receiver 21.
In the present exemplary embodiment, a strip of material, in partic~lar a tear-open strip 25, attached ~off-center) to the web 10 is monitored independently of the ~eb 10. A tear-open sheet 25 of this type is custom-ary on outer wrappers of packs, especially on the outer ~oil ~rapper of cigarette packs. To clarify the illus-trations in Figures 3 and 4, the web 1n ;s provided with imaginary transverse parting lines 26 defined by blanks 27, one for each pack, which are subsequently to be severed from the ~eb 10. The tear-open strip 26 extends over the full length of the blanks 27 and consequently o~er the web 10. A prestamped gripping tab 28 for grasping the tear-open strip 25 when the pack is opened is marked at the end of each blank 27.
In the exemplary embodiment illustrated, the pre-sence and exact relative position of the tear-open strip 25 are monitored by an independent system which consists of a common transmitter 29 and two receivers 30 and 31 arranged at 3 distance from one another. An amplifier 32 is located after each of the latter.
The receivers 30 and 31 are arranged at a distance from one another, for example, approx;mately 1 mm, which is somewhat less than the w;dth of the tear-open strip 25.
As a result, when the tear-open strip ZS is arranged in the normal position, the two receivers 30~ 31 are covered by the latter or by the light beam. In the event of a devia-tion from the normal position, one receiver 30, 31 or the ` ~~ - 6 - 12S3230 other receives infrared light directly, with the result that an error signal is triggered and a movement to cor-rect the feed of the tear-open strip 25 initiated.
Optical ;ndicator members 33 and 34, ~h;ch here project from the housing 12 in the region of an end ~all 35 of the latter, can be assigned to the t~o monitoring systems 20, 21, on the one hand, and 29, 30, 31, on the other hand. Any defect is tadditionally) displayed by the indicator members 33, 34.
In the present case, the monitoring system with the transmitter 29 and receivers 30 and 31 performs a double function. For this purpose, the tear-open strip 25 is prov;ded ~ith a ~colored~ distinguishing mark 36~ in the region of the gripping tab 28 in the exemplary embodi ment of Figure 4. In the present arrangement, this is used as an additional monitoring aid, specifical~y for the exact relative position of the blank 27, to be severed from the ~eb 10, in relation to the pack 5not sho~n) to be wrapped. For th;s purpose, the ~colored) distinguish;ng mark 36 is sensed by the transmitter 29 or the rece;vers 30, 31. The result is evaluated in such a ~ay that, in the event that a difference is detected in respect of the rela-t;ve position, the conveying movement of the ~eb 10 and consequently the relative positions of the blanks 27 are changed.
Because the monitoring systems are separated from one another, it is possible to adjust their sensi~ivity differently according to the monitoring objective. Further-more, the connected adjusting devices of the packaging machine can be arranged and adjusted separately in terms of rapidity of action and the magn;tude and direct;on of the set values.
The ;nfrared light is generated periodically by the transmitters (2 - S kHz), in order substant;ally to prevent the influences of extraneous light. During the sensing of the tear-open strip 25~ the relative posit;on of the members can be selected so that the reGeivers 30, 31 are each half-covered by the tear-open strip 25, ~hat is to say supply approximately half the;r possible po~er.
_ 7 _ ~ ~5~230 With the tear-open strip 25 running centrally, the initial values are set by the separate amplifiers 32 connected after each receiver 30, 31, so that they are approximately the same and the output signals do not indicate any defect.
(Threshold-value setting according to the permissible tole-rance deviation in a lateral direction.) In this arrangement, the signals can be evaluated in various ways. When one of the amplifiers 32 or both of them emit an error signal, this can be transmitted as a defect to the output via an AND operation. A~ternatively, each amplifier 32 can emit a di~ferent signalO for example positive voltage on the one hand and negative voltage on the other hand. ~he two s;gnals are transmitted to a sum-ming amplifier, the output of ~hich is zero ~hen the tear-open strip 25 is running in the proper way. As a result of hystereses, adjustable by means of a potentiometer, according to positive and negative values at the output, the permissible deviation of the tear-open strip 25 from the zero position can be set. At the same time, these positive and negative values can serve for readjusting the position of the tear-open str;p via a correction con-troL. Furthermore, the signals for separating out the defective packs or stopping the packaging machine are de-rived here.
In connection ~ith packaging machines, it is neces-sary to monitor ~ebs of materia~, especia~Ly ~ebs of packaging materiaL. On the one hand, it is important to identify material defects, for example holes and tears, but also ~eb joins made by adhesive tape, etc. ~hen de-fects of this type are detected, one or more packs, espec-ially cigarette packs, produced from ~he packaging material having these defects are separated out. Ho~ever, ;t is also necessary, furthermore, to monitor the run of the ~eb of material, that is to say its relative position.
When there are deviations from the desired positions, the sheet is adjusted into the correct direction of movement by suitable adjusting members.
A monitoring and control arrangement of this type is described in EP-A-25,563. In th;s kno~n proposal, a reeL carrier has assigned to ;t a photoelectric sensing device ~hich consists of two sensor bars arranged at a distance from one another. The ~eb of packaging material runs through bet~een these in such a way that a ro~ of sensors arranged at a slight distance from one another ex-tends on each of the t~a sides of the ~eb. Furthermore, i~
lZ~3Z30 there are on each sensor bar t~o lateral sensors (trans-mitter and rece;ver) wh;ch sense the side edges of the sheet and which detect any skewing~ In the known device, these last-mentioned sensors or any error signals are used to actuate a servo-motor which correctly adjusts the reel or reel mounting.
Although the known arrangement is suitabLe for monitoring material and positional defects in a web of material, nevertheless it involves a relatively high out-lay in terms of construction and handling.
The object on which the invention is based is to propose an arrangement for monitoring material and posi-tional defects in or on ~ebs, ~hich ;s simple and inex-pensive in terms of construction, but which is neverthe-less reliable to operate.
To achieve this object, the arrangement according to the invention is defined by at least two sensors or groups of sensors, independent of one another, for sensing several material and production features of the web.
In the preferred embodiment of the invention, there are t~o groups of sensors which can be activated in-dependently of one another. A first group of only two sensors, namely a transmitter and receiver, serYes for ~oni-toring the material quality of the web. In this case, the transmitter is preferably designed as a light transmit-ter tinfrared light transmitter) and the receiver is de-signed as a photodiode. The web is conveyed through between the transmitter and receiver, changes in the in-tens;ty of the received light being recorded by the re-ceiver, for example thicker or thinner portions of mater-;al, tearing, adhesive tape for joining the ends of ~ebs connected to one another, etc. The error signal generated by the rece;ver is used to separate out one or more packs from the region of the defective web.
According eO the invention, a group of ~urther sensors, in particular a transmitter and two receivers arranged at a distance from one another, serves for moni-toring a strip of material (foil tear-open strip) applied to the web. In this case, the receivers are arranged at _ 3 _ 1 ~ ~ 3~ 3V
a d;stance from one another ~h;ch is less than the width of the fo;l tear-open str;p, so that the two rece;vers are covered by the latter. In the event that the str;p deviates from the normal position, more l;ght ;s suppl;ed to one sensor or the other, and an error s;gnal is der;ved from th;s.
Accord;ng to~the invent;on, this group of sensors has a further function, namely to monitor the relat;ve position of the packag;ng blanlcs wh;ch, together with the str;p of materiaL, are severed from the web. For this purpose, each foil tear-open strip is provided with a mark;ng (colored d;st;ngu;shing mark) ~hich is sensed ;n respect of its relative position by the sensors. A change ;ri its position also means an undes;rable change ;n the relative pos;t;on of the blank.
According to a further proposal of the ;nvent;on, these and, if appropr;ate, further sensors are arranged ;n or on a common un;tary holder wh;ch ;s U-shaped. The sen-sors (transm;tters and receivers) located oppos;te one another are arranged on (horizontally) d;rected legs, the web being conveyed through between the sensors ;n the reg;on of a slit open on one s;de. These sensors are attached to a common U-shaped board as a carr;er.
A mon;tor;ng arrangement des;gned ;n th;s way is s;mple to handle, ;n particular simple to assemble and, if necessary, exchange. The complete arrangement is designed as a saleabLe and handy unit.
Further features of the invention relate to the constructive design of the monitoring arrangement and to ;ts members.
Exemplary embod;ments of the invention are ex-plained ;n more de~ail below ~ith reference to the drawings ;n wh;ch:
Figure 1 shows, in a side view, a unit for monitoring webs, w;th mon;tor;ng members shown d;agrammatically, Figure 2 sho~s the unit according to Figure 1 in an end view, together with the ~eb, on 3 reduced scale, Figure 3 shows a plan view relating to figure 2, `` i25~3~
_ 4 Figure 4 shows an illustrat;on corresponding to Figure 3 and of another exemplary embodiment.
The exemplary embodiment of a monitoring and con-trol un;t, illustrated in the drawings, is particularly suitable in conjunction ~ith packaging machines, preferably cigarette-packaging machines. A web 10 consisting, for example of a plastic foil and fed continuously to the pack-aging machine or a packaging unit (for example, a foil apparatus) is to be sensed as regards its relative posi-tion, defects, etc. The defects include irregularities in the material quality of the ~eb 10 (holes, tears, unde-sirable thickened portions~, as ~ell as transverse adhesive tapes 11 for joining the ends of successive ~ebs 10.
The monitoring arrangement consists of or is accom-modated comoletely in a separate housing 1Z. This unit, ~hich is approximately rectangu~ar or cuboid in the pre-sent case, can be installed complete in or on the packaging machine and exchanged if necessary.
The housing 12 forms a slit 13 which is off-center here and which is open at one edge. By means of-~his slit, the housing 12 acquires an essentially U-shaped form with legs 14 and 15 and a cross-piece 16 connect;ng these to one another on one side. The web 10 runs through the slit 13 transversely to the longitudinaL extension of the housing 12, preferably in a horizontal plane. The monitoring members, in particular optical or photoelectric sensors as we~l as indicator members and the electronic and electro-technical devices, are accommodated in the U-shaped housing 12 or the housing designed with the slit 13 open on one side. The main carrier of these members is a board 17 which is U-shaped or designed ~ith a slit 13. On the edge of this board, in particular follo~ing the contours, is formed a transverse ~all 18 which ex~ends all round. This 3LsO limits the slit 13 on both sides of the latter. Cover-;ng ~alls 19 which are part of the closed housing 12 are appropriately attached on the outside.
In the preferred exemplary embodiments illustrated here, the ~eb 10 is sensed for any material defects by a first monitoring system ~hich consists of a transmitter 20 _ 5 _ 1 2 S 32 30 on one side of the slit 13 and consequently of the web 10 and a receiver 21 on the other side. A test med;um is emitted by the transmitter 20, preferably a pulsating infrar-ed light ~hich, after passing through the web 10, is received by the receiver 21n Changes in the radiation or light intensity result in an appropriate evaluation by evaluation electronics located after the r~ece;ver 21 and, if appropriate, in an error signaL be;ng generated. In the region of the ~upper and lower) transverse wall 18, the infrared light is conveyed respectively through plane windows 22 and 23 within this transverse ~all. An ampLi-fier 24 ;s connected after the receiver 21.
In the present exemplary embodiment, a strip of material, in partic~lar a tear-open strip 25, attached ~off-center) to the web 10 is monitored independently of the ~eb 10. A tear-open sheet 25 of this type is custom-ary on outer wrappers of packs, especially on the outer ~oil ~rapper of cigarette packs. To clarify the illus-trations in Figures 3 and 4, the web 1n ;s provided with imaginary transverse parting lines 26 defined by blanks 27, one for each pack, which are subsequently to be severed from the ~eb 10. The tear-open strip 26 extends over the full length of the blanks 27 and consequently o~er the web 10. A prestamped gripping tab 28 for grasping the tear-open strip 25 when the pack is opened is marked at the end of each blank 27.
In the exemplary embodiment illustrated, the pre-sence and exact relative position of the tear-open strip 25 are monitored by an independent system which consists of a common transmitter 29 and two receivers 30 and 31 arranged at 3 distance from one another. An amplifier 32 is located after each of the latter.
The receivers 30 and 31 are arranged at a distance from one another, for example, approx;mately 1 mm, which is somewhat less than the w;dth of the tear-open strip 25.
As a result, when the tear-open strip ZS is arranged in the normal position, the two receivers 30~ 31 are covered by the latter or by the light beam. In the event of a devia-tion from the normal position, one receiver 30, 31 or the ` ~~ - 6 - 12S3230 other receives infrared light directly, with the result that an error signal is triggered and a movement to cor-rect the feed of the tear-open strip 25 initiated.
Optical ;ndicator members 33 and 34, ~h;ch here project from the housing 12 in the region of an end ~all 35 of the latter, can be assigned to the t~o monitoring systems 20, 21, on the one hand, and 29, 30, 31, on the other hand. Any defect is tadditionally) displayed by the indicator members 33, 34.
In the present case, the monitoring system with the transmitter 29 and receivers 30 and 31 performs a double function. For this purpose, the tear-open strip 25 is prov;ded ~ith a ~colored~ distinguishing mark 36~ in the region of the gripping tab 28 in the exemplary embodi ment of Figure 4. In the present arrangement, this is used as an additional monitoring aid, specifical~y for the exact relative position of the blank 27, to be severed from the ~eb 10, in relation to the pack 5not sho~n) to be wrapped. For th;s purpose, the ~colored) distinguish;ng mark 36 is sensed by the transmitter 29 or the rece;vers 30, 31. The result is evaluated in such a ~ay that, in the event that a difference is detected in respect of the rela-t;ve position, the conveying movement of the ~eb 10 and consequently the relative positions of the blanks 27 are changed.
Because the monitoring systems are separated from one another, it is possible to adjust their sensi~ivity differently according to the monitoring objective. Further-more, the connected adjusting devices of the packaging machine can be arranged and adjusted separately in terms of rapidity of action and the magn;tude and direct;on of the set values.
The ;nfrared light is generated periodically by the transmitters (2 - S kHz), in order substant;ally to prevent the influences of extraneous light. During the sensing of the tear-open strip 25~ the relative posit;on of the members can be selected so that the reGeivers 30, 31 are each half-covered by the tear-open strip 25, ~hat is to say supply approximately half the;r possible po~er.
_ 7 _ ~ ~5~230 With the tear-open strip 25 running centrally, the initial values are set by the separate amplifiers 32 connected after each receiver 30, 31, so that they are approximately the same and the output signals do not indicate any defect.
(Threshold-value setting according to the permissible tole-rance deviation in a lateral direction.) In this arrangement, the signals can be evaluated in various ways. When one of the amplifiers 32 or both of them emit an error signal, this can be transmitted as a defect to the output via an AND operation. A~ternatively, each amplifier 32 can emit a di~ferent signalO for example positive voltage on the one hand and negative voltage on the other hand. ~he two s;gnals are transmitted to a sum-ming amplifier, the output of ~hich is zero ~hen the tear-open strip 25 is running in the proper way. As a result of hystereses, adjustable by means of a potentiometer, according to positive and negative values at the output, the permissible deviation of the tear-open strip 25 from the zero position can be set. At the same time, these positive and negative values can serve for readjusting the position of the tear-open str;p via a correction con-troL. Furthermore, the signals for separating out the defective packs or stopping the packaging machine are de-rived here.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a packaging machine for packaging objects with a web which is passed along a path through said packaging machine, said web being divided into a plurality of blanks, said web further having an elongate tear-open strip running along the length of said web and along the path through which said web passes, a device for monitoring conditions of said web, said device comprising:
a first set of sensors for sensing a first set of characteristics of said web, said first of characteristics including material defects, and for accordingly providing a signal indicative of a material defect; and a second set of sensors for sensing a second set of characteristics of said web, different from said first set of characteristics, said second set of characteristics including positional orientation of said web with respect to said packaging machine, and for accordingly providing a signal indicative of mispositioning.
a first set of sensors for sensing a first set of characteristics of said web, said first of characteristics including material defects, and for accordingly providing a signal indicative of a material defect; and a second set of sensors for sensing a second set of characteristics of said web, different from said first set of characteristics, said second set of characteristics including positional orientation of said web with respect to said packaging machine, and for accordingly providing a signal indicative of mispositioning.
2. A device as claimed in claim 1, wherein said first set of sensors comprises transmitting means, positioned on one side of a path of said web, for transmitting light through said web, and receiving means, positioned on an opposite side of said path of said web from said transmitting means, for receiving the light emitted by said transmitting means, said receiving means including means for outputting said signal indicative of a material defect in accordance with variations in intensity of received light.
3. A device as claimed in claim 1, wherein said first set of sensors comprises first transmitting means, positioned on a first side of said web, for transmitting light through said web, and first receiving means, positioned on an opposite side of said web, for receiving the light transmitted by said first transmitting means, said first receiving means outputting said signal indicative of material defects in response to material defects detected in said web, said defects being detected in accordance with a difference in light intensity detected by said light receiving means.
4. A device as claimed in claim 1, wherein said second set of sensors comprises transmitting means, positioned on one side of a path of said web, for transmitting light through said web, first receiving means positioned on an opposite side of said path from said transmitting means, for receiving light transmitted by said transmitting means through said web, and second receiving means, positioned on the same side of said web as said first receiving means, for receiving light transmitted by said transmitting means through said web, said first and second receiving means including means for outputting said signal indicative of mispositioning in accordance with a difference in respective intensities of light received by said first and second receiving means.
5. A device as claimed in claim 4, wherein said means for outputting said error signal includes means for comparing respective intensities of light received by said first and second receiving means and for outputting an error signal if the intensities are different.
6. A device as claimed in claim 4, wherein said first receiving means outputs a signal having a first intensity and a first polarity, said second receiving means outputs a signal having a second intensity and a second polarity, said means for outputting an error signal including means for adding the outputs of said first and second receiving means and obtaining a sum, and outputting an error signal if the sum is not zero.
7. In a packaging machine for packaging objects with a web which is passed along a path through said packaging machine, said web being divided into a plurality of blanks, said web further having an elongate tear-open strip running along the length of said web and along the path through which said web passes, a device for monitoring conditions of said web, said device comprising a set of sensors for sensing a set of characteristics of said web, said set of characteristics including positional orientation of said web with respect to said packaging machine, and for accordingly providing a signal indicative of mispositioning, wherein said set of sensors comprises transmitting means, positioned on one side of said web, for transmitting light through said web, and first and second receiving means, positioned on an opposite side of said web from said transmitting means, for receiving the light transmitted by said light transmitting means, said first and second receiving means being positioned adjacent one another in a transverse direction of said web, said tear-open strip normally passing between said first and second receiving means along said path, said tear-open strip having a different light transmitting characteristic from said web, wherein positional orientation of said web with respect to said packaging machine is detected in accordance with the light intensities detected by said first and second receiving means, said first and second receiving means outputting said indicative of mispositioning in accordance with a difference in the respective light intensities, said difference varying in accordance with a position of said tear-open strip with respect to said first and second receiving means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3341539.0 | 1983-11-17 | ||
| DE19833341539 DE3341539A1 (en) | 1983-11-17 | 1983-11-17 | DEVICE FOR MONITORING AND CONTROLLING RAILWAYS IN PACKAGING MACHINES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1253230A true CA1253230A (en) | 1989-04-25 |
Family
ID=6214536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000467002A Expired CA1253230A (en) | 1983-11-17 | 1984-11-02 | Arrangement for monitoring and controlling webs in packaging machines |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4682038A (en) |
| EP (1) | EP0142129B1 (en) |
| JP (1) | JPS60123329A (en) |
| BR (1) | BR8405859A (en) |
| CA (1) | CA1253230A (en) |
| DE (2) | DE3341539A1 (en) |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2592487B1 (en) * | 1985-12-31 | 1988-03-11 | Centre Tech Ind Papier | DEVICE FOR DETECTING A TEAR PRIME ON A SHEET DURING ITS MANUFACTURE. |
| IT1189918B (en) * | 1986-01-27 | 1988-02-10 | Gd Spa | CONTROL DEVICE FOR CORRECT CONFORMATION OF PACKAGE ELEMENTS |
| DD268592A3 (en) * | 1986-12-30 | 1989-06-07 | Nagema Veb K | Device for monitoring packaging materials in packaging machines |
| DE3805248A1 (en) * | 1988-02-19 | 1989-08-31 | Dietrich Luederitz | Electronic apparatus for observing films |
| IT1233296B (en) * | 1989-01-10 | 1992-03-26 | Ima Spa | DEVICE FOR THE TEMPORARY INTERRUPTION OF THE FLOW OF ITEMS INTENDED TO BE PLACED INSIDE CORRESPONDING CELLS MADE ON A TAPE, IN A MACHINE FILLING MACHINE TAPES |
| JP2841204B2 (en) * | 1989-01-31 | 1998-12-24 | 東芝メカトロニクス株式会社 | Packaging method and equipment |
| DE58901190D1 (en) * | 1989-04-12 | 1992-05-21 | Landis & Gyr Betriebs Ag | ARRANGEMENT FOR MEASURING A TRACK DIFFERENCE OF A MOVABLE FILM COVER. |
| US5187374A (en) * | 1991-03-21 | 1993-02-16 | Ncr Corporation | Optical paper sensing method and apparatus having light source and detector moveable in pivotal relation |
| IT1257835B (en) * | 1992-06-17 | 1996-02-13 | Gd Spa | TAPE MATERIAL THICKNESS DETECTOR DEVICE, IN PARTICULAR IN DEVICES FOR THE AUTOMATIC CHANGE OF METALLIC TAPE MATERIAL SPOOLS |
| US5457539A (en) * | 1993-06-18 | 1995-10-10 | Abb Industrial Systems, Inc. | On-line compensation for deflection in instruments using focused beams |
| WO1995013235A1 (en) * | 1993-11-11 | 1995-05-18 | Packline Limited | Packaging |
| DE19636365A1 (en) * | 1996-09-06 | 1998-04-09 | Focke & Co | Hinged box and method of making the same |
| DE19704718A1 (en) * | 1997-02-07 | 1998-08-13 | Focke & Co | Method and device for optoelectronic monitoring of packaging material |
| DE19725223A1 (en) * | 1997-06-14 | 1998-12-17 | Rovema Gmbh | Shell material carrier |
| US6075882A (en) * | 1997-06-18 | 2000-06-13 | Philip Morris Incorporated | System and method for optically inspecting cigarettes by detecting the lengths of cigarette sections |
| US6198537B1 (en) | 1997-07-11 | 2001-03-06 | Philip Morris Incorporated | Optical inspection system for the manufacture of banded cigarette paper |
| US6020969A (en) * | 1997-07-11 | 2000-02-01 | Philip Morris Incorporated | Cigarette making machine including band inspection |
| US5966218A (en) * | 1997-07-11 | 1999-10-12 | Philip Morris Incorporated | Bobbin optical inspection system |
| GB2331894B (en) | 1997-11-27 | 2000-03-29 | Connell Anne O | Analysis of data streams |
| GB2331895B (en) | 1997-11-27 | 2000-03-29 | Connell Anne O | Testing data packets |
| GB2331896B (en) | 1997-11-27 | 2000-03-29 | Connell Anne O | Last-in first out data stacks and processing data using such data stacks |
| DE19817824A1 (en) | 1998-04-21 | 1999-10-28 | Focke & Co | Device for testing units from several individual objects, layers of material or the like |
| DE19827412A1 (en) * | 1998-06-19 | 1999-12-30 | Focke & Co | Method and device for producing packages |
| DE10021838A1 (en) * | 2000-05-05 | 2001-11-08 | Focke & Co | Device for manufacturing products and method for controlling such a device |
| EP1310154B1 (en) * | 2001-11-09 | 2007-12-19 | Welger Maschinenfabrik GmbH | Device for wrapping bodies, in particular bales of harvested material |
| EP1310153A1 (en) * | 2001-11-09 | 2003-05-14 | Lely Enterprises AG | Method for wrapping objects, particularly agricultural round bales |
| DE20120977U1 (en) * | 2001-12-27 | 2003-04-30 | Bat Cigarettenfab Gmbh | Cutting control for an inner wrapper for a cigarette group |
| DE10246437A1 (en) | 2002-10-04 | 2004-04-15 | Focke Gmbh & Co. Kg | Packaging film checking device for checking for the correct position of the tearing-off strip in packaging film comprises ultrasonic transmitter and receiver focussed on the area of the tearing-off strip |
| TWM330197U (en) * | 2007-05-08 | 2008-04-11 | Tsc Auto Id Technology Co Ltd | Sheet sensor for tab printer |
| EP2186624B1 (en) * | 2008-11-18 | 2015-08-26 | Tetra Laval Holdings & Finance S.A. | Apparatus and method for detecting the position of application of a sealing strip onto a web of packaging material for food products |
| CN102502013A (en) * | 2011-11-11 | 2012-06-20 | 苏州晶雷光电照明科技有限公司 | LED strip winding device |
| DE102012025158A1 (en) * | 2012-12-21 | 2014-06-26 | Focke & Co. (Gmbh & Co. Kg) | Method and device for the automatic testing of flat sheet material |
| ITVR20130218A1 (en) * | 2013-09-20 | 2015-03-21 | Bema Srl | DEVICE AND PROCEDURE OF CONTROL OF THE QUALITY OF FILM EXTENSIBLE FOR PACKAGING |
| EP2923957A1 (en) * | 2014-03-26 | 2015-09-30 | UHLMANN PAC-SYSTEME GmbH & Co. KG | Device for adapting the control of a system for processing foil webs |
| AU2018336150B2 (en) | 2017-09-22 | 2021-11-25 | Lantech.Com, Llc | Packaging material quality compensation |
| AU2019390252A1 (en) * | 2018-11-27 | 2021-06-10 | Scatterbrain Pty Ltd | A first-aid kit container dispensing system |
| WO2020190910A1 (en) | 2019-03-20 | 2020-09-24 | Lantech.Com, Llc | Packaging material evaluation and apparatus therefor for sensing packaging material flaws |
| EP4031456A4 (en) | 2019-09-19 | 2023-10-18 | Lantech.Com, Llc | Ultrasonic packaging material flaw detection with time-limited response detection |
| CA3147093A1 (en) | 2019-09-19 | 2021-03-25 | Iii Patrick R. Lancaster | Packaging material grading and/or factory profiles |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2486334A (en) * | 1948-09-25 | 1949-10-25 | Westinghouse Electric Corp | Photoelectric scanner for register regulation |
| DE1041976B (en) * | 1954-08-13 | 1958-10-30 | Siemens Ag | Arrangement of registration marks on the print web for photoelectric side register control in multi-color rotary printing machines |
| DE1038569B (en) * | 1955-11-04 | 1958-09-11 | Iacellophaneia Invest Company | Device for compensating the transverse displacements of the edge of a film running off a roll, especially for printing machines |
| US3232547A (en) * | 1962-08-03 | 1966-02-01 | Hurletron Inc | Edge monitor device |
| JPS4929970U (en) * | 1972-06-16 | 1974-03-14 | ||
| GB1507938A (en) * | 1975-07-17 | 1978-04-19 | Hurleton Altair | Register control system for a moving web |
| JPS535016U (en) * | 1976-06-28 | 1978-01-18 | ||
| DE2831038C2 (en) * | 1978-07-14 | 1982-07-01 | Siemens AG, 1000 Berlin und 8000 München | Radiation diagnostic device for the generation of slice images |
| US4247204A (en) * | 1979-02-26 | 1981-01-27 | Intec Corporation | Method and apparatus for a web edge tracking flaw detection system |
| DE3034901A1 (en) * | 1979-09-17 | 1981-04-30 | Intec Corp., Trumbull, Conn. | Defect detector system automatic scanning beam positioner - has beam sensor next edge of moving web detecting laser beam position w.r.t. its scanning path |
| DE2937661A1 (en) * | 1979-09-18 | 1981-04-02 | Focke & Co, 2810 Verden | BOBINE HOLDER, ESPECIALLY FOR PACKAGING MACHINES |
| US4284356A (en) * | 1979-09-26 | 1981-08-18 | Ppg Industries, Inc. | Method of and apparatus for comparing surface reflectivity |
| US4386273A (en) * | 1980-05-01 | 1983-05-31 | The B. F. Goodrich Company | Positioner and slitter for laminar material |
| DE3024698A1 (en) * | 1980-06-30 | 1982-01-28 | Rainer 7602 Oberkirch Hess | Contactless edge detector appts. - measures surface roughness using laser beam |
| EP0043723B1 (en) * | 1980-07-07 | 1985-06-05 | Automated Packaging Systems, Inc. | Continuous web registration |
| DE3129808C2 (en) * | 1981-07-29 | 1983-06-16 | Feldmühle AG, 4000 Düsseldorf | Method for testing transparent material webs |
| DE3142316A1 (en) * | 1981-10-24 | 1983-05-05 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | DEVICE FOR CONTROLLING THE LATERAL POSITION OF A PRINTED MATERIAL RAIL IN ROLLING PRINTING MACHINES |
| DE3240825C2 (en) * | 1982-11-05 | 1985-06-20 | Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg | Device for checking the presence of a web of material |
| JPH10163A (en) * | 1996-06-15 | 1998-01-06 | Chubu Corp:Kk | Method for using heat roaster |
-
1983
- 1983-11-17 DE DE19833341539 patent/DE3341539A1/en active Granted
-
1984
- 1984-11-02 CA CA000467002A patent/CA1253230A/en not_active Expired
- 1984-11-08 EP EP84113469A patent/EP0142129B1/en not_active Expired
- 1984-11-08 DE DE8484113469T patent/DE3474281D1/en not_active Expired
- 1984-11-15 US US06/671,843 patent/US4682038A/en not_active Expired - Lifetime
- 1984-11-15 JP JP59239614A patent/JPS60123329A/en active Granted
- 1984-11-16 BR BR8405859A patent/BR8405859A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0142129A3 (en) | 1985-07-03 |
| DE3474281D1 (en) | 1988-11-03 |
| JPH0317706B2 (en) | 1991-03-08 |
| EP0142129A2 (en) | 1985-05-22 |
| DE3341539A1 (en) | 1985-05-30 |
| JPS60123329A (en) | 1985-07-02 |
| BR8405859A (en) | 1985-09-17 |
| DE3341539C2 (en) | 1991-03-28 |
| US4682038A (en) | 1987-07-21 |
| EP0142129B1 (en) | 1988-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |