CA1167677A - Suction press roll - Google Patents
Suction press rollInfo
- Publication number
- CA1167677A CA1167677A CA000399701A CA399701A CA1167677A CA 1167677 A CA1167677 A CA 1167677A CA 000399701 A CA000399701 A CA 000399701A CA 399701 A CA399701 A CA 399701A CA 1167677 A CA1167677 A CA 1167677A
- Authority
- CA
- Canada
- Prior art keywords
- holes
- web
- press
- roll
- shell
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
- D21F3/105—Covers thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/08—Pressure rolls
- D21F3/083—Pressure rolls perforated
Abstract
ABSTRACT OF THE DISCLOSURE
A press roll for a press couple for dewatering a web in a papermaking machine wherein the roll preferably is a roll shell with certain of the drilled holes extending radially fully through the shell and certain other holes blind drilled to extend only a partial way into the shell and in one form, the shell having a rubber cover and the blind drilled holes extending alternate different depths to avoid shear planes in the rubber cover.
A press roll for a press couple for dewatering a web in a papermaking machine wherein the roll preferably is a roll shell with certain of the drilled holes extending radially fully through the shell and certain other holes blind drilled to extend only a partial way into the shell and in one form, the shell having a rubber cover and the blind drilled holes extending alternate different depths to avoid shear planes in the rubber cover.
Description
1 16767~
BAC~GROUND OF THE I~VENTION
The invention relates to improvements in paper machine press rolls, and more partic~larly to an improved press roll with a drilled hole pattern in the surface that attains improved de-watering of a web passing through a press couple formed between two press rolls.
The invention relates to a press roll primarily as used in a press couple where opposed parallel rolls pass a felt and a web therebetween to press wàter from the web into the felt.
The roll backing the felt may be provided with various config-urations to relieve the resistance to water flow and accept water being pressed into and through the felt. If no such means are provided, the roll is generally referred to as a plain roll, but the rolls with relieving openings are grooved rolls, blind drilled rolls, fabric sleeve rolls and suction rolls. While such rolls are presently currently used in roll couples, they may also be employed in extended nip presses where one side of the nip is faced by an arcuate shoe or belt creating a pressing zone against the ~urface of the roll.
A requirement of a roll in a dewatering press is that it function to transfer the maximum amount of water from a web to a felt passing through the nip, and this is accomplished by offering a minimum amount of resistance to the transfer of water.
This must be done uniformly so as not to mark the web, and must be done with a minimum amount of rewetting on the offrunning side of the nip.
T~E INVENTIO~
An object of the invention is to provide an improved press roll structure and particularly an open roll which en-hances the removal of water from a web in the press nip, and which eliminates or substantially reduces the marking of the web.
Where an open roll LS used w~th grooves or drilled holes in the surface, it has been thought by some that the water flow path length is of primary importance in determining water re-moval. This has been found to be a factor, but an important factor has been discovered to be the uniformity of pressure in the press nip. Such uniformity will not be accomplished if the drilled holes in the roll are too large so that the bridging distance over the holes permits the felt to be depressed into the hole thereby reducing the pressure applied to the web. Tests have shown that with low ingoing felt moisture, the plain press, the fabric sleeve press and the grooved press all perform about the same level The blind drilled roll and suction roll do not give as good a performance, and this is believed to be due to a poorer pressure uniformity due to the large size of holes or vents $n rolls with conventional structures, that is, with con-ventional size holes or vents and with a conventional distribu-tion of holes or vents. While it is important to keep the flow path length short, it is equally important to keep the bridging distance short, that is, the distance across the hole opening.
It is generally not practical to drill a hole 2" to 3"
.deep which ~s necessary through a roll shell when the hole diameter i~ below 0.1". No practical manufacturing technique has been discovered for drilling deep small diameter holes so that it would be impractical to reduce the hole size in a suction roll in order to place the holes closer together to attain suffi-cient open area.
A feature of the invention is to provide a roll shell with holes of a conventional size extending all the way through 1 ~67~7 the ~shell in a conventional suction roll manner, and to inter-sperse between the suction holes blind drilled holes. A further feature of the invention is to provide the blind drilled holes of varying depthsr particularly in rubber covered rolls to avoid shear planes in the rubber cover. A further ob~ect of the inven-tion is to provide ~ hole pattern as above described which re-duces the noise generation occurring at high operating speeds.
A further ob~ect of the invention is to provide a press roll with holes or openings in the surface which are sufficiently small to reduce the bridging distance and obtain uniform pressure on the web and yet which are not so small that they will encounter plugging or filling from the material of the felt.
Other objects and advantages and features will become more apparent with the teaching of the principles of the inven-tion in connection with the disclosure of the preferred embodi-ments in the specification, claims and drawings, in which:
DRAWINGS
FIGURE 1 i8 a somewhat schematic elevational view of a roll press couple for dewatering a web in a paper machine;
FIGURE 2 is an enlarged sectional view illustrating the effect of an opening in the roll shell on the felt;
FIGURE 3 is a view similar to Figure 2 illustrating a smaller opening in the roll shell;
FIGURE 4 is a plan view of a portion of a roll shell sur-face constructed in accordance with the principles of the present invention; and FIGURE 5 is a fragmentary sectional view taken substan-tially along line V-V of Figure 4.
t 167~77 DESCRIPTION OF' THE PRE~ERRED EME~ODI~IENTS
Figure 1 illustrates a roll couple with a wet paper web W supported on a felt F passing through the nip N. The nip is formed between an upper p~ain roll 1~ suitably supported for rotation on an axis 14, and a lower roll shell 11 suitably supported for rotation on an axis 12. Within the roll shell and opposite the nip N is a suction gland 13.
As the web W is carried through the nip, it is subjected to the pressure between the two rolls and water is expressed out of the web into the felt and into openings in the surface of the roll shell 11. The openings are to permi~ water to pass easily into the felt from the paper and to receive water from the felt.
In considerations of having larger open areas for the passage of water and for reducing the distance the water must travel, it has been discovered that reduced water transfer occurs with increased size of openings, and as illustrated in Figure 2, at the bridging area of an opening 15, the f~lt F is unsupported. As illustrated at 17, where the opening in the suction roll has a dimension D, the felt tends to sag downwardly into the opening so that it is unsupported resulting in a low pressure area 18 opposite the web W. At this low pressure area, less water is pressed from the web so that despite a larger open area, not as much water travels out Df the web into the felt and into the opening.
With a shorter bridging area 19 as illustrated in Figure 3, as results from a smaller opening 16 in the roll 11, there i8 no low pressure area because the diameter of the opening 16 is small enough that the felt does not sag into the opening.
This results in uniform pressure being applied to the web W
even opposite the openings. Yet, as discussed above, it is impossible by ~nown rechniques to drill small openings of ~ ~7677 sui-ficient number through the approximate 3" thic~ness of the ro]Ll shell.
~ n accordance with the concepts of the present invention, blind drilled holes are interspersed between the suction roll ho:Les. As ~llustrated in Figures 4 and 5, holes 20 extend all the way through the roll shell. Between these are blind drilled holes 21 and 22 which can be of smaller diameter because they are not drilled all the way through the shell. Structurally, the blind drilled holes preferably extend only into the hard rubber cover 23 that forms the outer layer of the suction roll shell 11.
To avoid a shear plane being formed in the cover, the blind drilled holes 21 and 22 are drilled of different depths.
From a structure standpoint, the roll shell has a plurality of holes in the surface leading to axially extending passages which are of different lengths. The passages formed at 20 extend all the way through the roll shell. The passages 21 are blind drilled of maximum depth. The passages 22 are shallower blind drilled openings.
Further, the blind drilled holes are preferably of smaller diameter, on the order of .02" to .1" in diameter.
The shallower holes 22 are 1/4" deep, and the deeper holes 21 are 3/~" deep.
With the arrangement, the suction holes 20 are drilled at a spacing somewhat greater than currently ~sed, i.e., 1.5 to 5 times the usual distance apart. This reduces the total area where low support is given in the manner illustrated in Figure 2. Some vacuum will still exist at the shell surface to effect control over sheet transer or direction, and to aid in water tran fer. The blind drilled holes in combination with the - t I67677 ~uct:ion hole~ attain a greater frequency over a shorter distance between holes than possible with the normal suction roll pattern where all of the holes are through drilled holes. The arrange-ment attains a better transfer of water into the felt and into the holes than where all through drilled holes are used because of the more uniform pressure applied to t~e web. This is caused by a smaller bridging area for the blind drilled holes, and yet accomplishing a greater number of openings within a given area.
The hole distribution i~ such that the total open area on the roll face is 20% to 25% of the area.
As illustrated in Figure 4, a preferred ~orm of hole pattern is such that there are two blind drilled holes between every pair of through holes. One of these blind drilled holes is shallower than the other eliminating the shear plane.
The through holes 22 are of a commercially acceptable size on the order of .109" in diameter.
In operation, with reference to Figure 1, the web and felt pass through the nip and dewatering occurs with a uniform pressure being applied to the web through the nip. Water passes into the felt and into the open holes 20 and blind drilled holes 21 and 22, and is thrown off on the offrunning side, and the felt is dried. A more uniform and better transfer of water occurs than with conventional suction roll drilling patterns with all through drilled holes or with the other forms of roll openings including conventional blind drilled openings, grooved rolls or fabric sleeve covers.
Thus, it will be seen that we have provided an improved press roll structure which accomplishe~ advantages and ob~ectives above set forth, and we do not intend to be limited to the specific orm of invention disclosed, but intend to cover all equivalents and modifications thereof.
BAC~GROUND OF THE I~VENTION
The invention relates to improvements in paper machine press rolls, and more partic~larly to an improved press roll with a drilled hole pattern in the surface that attains improved de-watering of a web passing through a press couple formed between two press rolls.
The invention relates to a press roll primarily as used in a press couple where opposed parallel rolls pass a felt and a web therebetween to press wàter from the web into the felt.
The roll backing the felt may be provided with various config-urations to relieve the resistance to water flow and accept water being pressed into and through the felt. If no such means are provided, the roll is generally referred to as a plain roll, but the rolls with relieving openings are grooved rolls, blind drilled rolls, fabric sleeve rolls and suction rolls. While such rolls are presently currently used in roll couples, they may also be employed in extended nip presses where one side of the nip is faced by an arcuate shoe or belt creating a pressing zone against the ~urface of the roll.
A requirement of a roll in a dewatering press is that it function to transfer the maximum amount of water from a web to a felt passing through the nip, and this is accomplished by offering a minimum amount of resistance to the transfer of water.
This must be done uniformly so as not to mark the web, and must be done with a minimum amount of rewetting on the offrunning side of the nip.
T~E INVENTIO~
An object of the invention is to provide an improved press roll structure and particularly an open roll which en-hances the removal of water from a web in the press nip, and which eliminates or substantially reduces the marking of the web.
Where an open roll LS used w~th grooves or drilled holes in the surface, it has been thought by some that the water flow path length is of primary importance in determining water re-moval. This has been found to be a factor, but an important factor has been discovered to be the uniformity of pressure in the press nip. Such uniformity will not be accomplished if the drilled holes in the roll are too large so that the bridging distance over the holes permits the felt to be depressed into the hole thereby reducing the pressure applied to the web. Tests have shown that with low ingoing felt moisture, the plain press, the fabric sleeve press and the grooved press all perform about the same level The blind drilled roll and suction roll do not give as good a performance, and this is believed to be due to a poorer pressure uniformity due to the large size of holes or vents $n rolls with conventional structures, that is, with con-ventional size holes or vents and with a conventional distribu-tion of holes or vents. While it is important to keep the flow path length short, it is equally important to keep the bridging distance short, that is, the distance across the hole opening.
It is generally not practical to drill a hole 2" to 3"
.deep which ~s necessary through a roll shell when the hole diameter i~ below 0.1". No practical manufacturing technique has been discovered for drilling deep small diameter holes so that it would be impractical to reduce the hole size in a suction roll in order to place the holes closer together to attain suffi-cient open area.
A feature of the invention is to provide a roll shell with holes of a conventional size extending all the way through 1 ~67~7 the ~shell in a conventional suction roll manner, and to inter-sperse between the suction holes blind drilled holes. A further feature of the invention is to provide the blind drilled holes of varying depthsr particularly in rubber covered rolls to avoid shear planes in the rubber cover. A further ob~ect of the inven-tion is to provide ~ hole pattern as above described which re-duces the noise generation occurring at high operating speeds.
A further ob~ect of the invention is to provide a press roll with holes or openings in the surface which are sufficiently small to reduce the bridging distance and obtain uniform pressure on the web and yet which are not so small that they will encounter plugging or filling from the material of the felt.
Other objects and advantages and features will become more apparent with the teaching of the principles of the inven-tion in connection with the disclosure of the preferred embodi-ments in the specification, claims and drawings, in which:
DRAWINGS
FIGURE 1 i8 a somewhat schematic elevational view of a roll press couple for dewatering a web in a paper machine;
FIGURE 2 is an enlarged sectional view illustrating the effect of an opening in the roll shell on the felt;
FIGURE 3 is a view similar to Figure 2 illustrating a smaller opening in the roll shell;
FIGURE 4 is a plan view of a portion of a roll shell sur-face constructed in accordance with the principles of the present invention; and FIGURE 5 is a fragmentary sectional view taken substan-tially along line V-V of Figure 4.
t 167~77 DESCRIPTION OF' THE PRE~ERRED EME~ODI~IENTS
Figure 1 illustrates a roll couple with a wet paper web W supported on a felt F passing through the nip N. The nip is formed between an upper p~ain roll 1~ suitably supported for rotation on an axis 14, and a lower roll shell 11 suitably supported for rotation on an axis 12. Within the roll shell and opposite the nip N is a suction gland 13.
As the web W is carried through the nip, it is subjected to the pressure between the two rolls and water is expressed out of the web into the felt and into openings in the surface of the roll shell 11. The openings are to permi~ water to pass easily into the felt from the paper and to receive water from the felt.
In considerations of having larger open areas for the passage of water and for reducing the distance the water must travel, it has been discovered that reduced water transfer occurs with increased size of openings, and as illustrated in Figure 2, at the bridging area of an opening 15, the f~lt F is unsupported. As illustrated at 17, where the opening in the suction roll has a dimension D, the felt tends to sag downwardly into the opening so that it is unsupported resulting in a low pressure area 18 opposite the web W. At this low pressure area, less water is pressed from the web so that despite a larger open area, not as much water travels out Df the web into the felt and into the opening.
With a shorter bridging area 19 as illustrated in Figure 3, as results from a smaller opening 16 in the roll 11, there i8 no low pressure area because the diameter of the opening 16 is small enough that the felt does not sag into the opening.
This results in uniform pressure being applied to the web W
even opposite the openings. Yet, as discussed above, it is impossible by ~nown rechniques to drill small openings of ~ ~7677 sui-ficient number through the approximate 3" thic~ness of the ro]Ll shell.
~ n accordance with the concepts of the present invention, blind drilled holes are interspersed between the suction roll ho:Les. As ~llustrated in Figures 4 and 5, holes 20 extend all the way through the roll shell. Between these are blind drilled holes 21 and 22 which can be of smaller diameter because they are not drilled all the way through the shell. Structurally, the blind drilled holes preferably extend only into the hard rubber cover 23 that forms the outer layer of the suction roll shell 11.
To avoid a shear plane being formed in the cover, the blind drilled holes 21 and 22 are drilled of different depths.
From a structure standpoint, the roll shell has a plurality of holes in the surface leading to axially extending passages which are of different lengths. The passages formed at 20 extend all the way through the roll shell. The passages 21 are blind drilled of maximum depth. The passages 22 are shallower blind drilled openings.
Further, the blind drilled holes are preferably of smaller diameter, on the order of .02" to .1" in diameter.
The shallower holes 22 are 1/4" deep, and the deeper holes 21 are 3/~" deep.
With the arrangement, the suction holes 20 are drilled at a spacing somewhat greater than currently ~sed, i.e., 1.5 to 5 times the usual distance apart. This reduces the total area where low support is given in the manner illustrated in Figure 2. Some vacuum will still exist at the shell surface to effect control over sheet transer or direction, and to aid in water tran fer. The blind drilled holes in combination with the - t I67677 ~uct:ion hole~ attain a greater frequency over a shorter distance between holes than possible with the normal suction roll pattern where all of the holes are through drilled holes. The arrange-ment attains a better transfer of water into the felt and into the holes than where all through drilled holes are used because of the more uniform pressure applied to t~e web. This is caused by a smaller bridging area for the blind drilled holes, and yet accomplishing a greater number of openings within a given area.
The hole distribution i~ such that the total open area on the roll face is 20% to 25% of the area.
As illustrated in Figure 4, a preferred ~orm of hole pattern is such that there are two blind drilled holes between every pair of through holes. One of these blind drilled holes is shallower than the other eliminating the shear plane.
The through holes 22 are of a commercially acceptable size on the order of .109" in diameter.
In operation, with reference to Figure 1, the web and felt pass through the nip and dewatering occurs with a uniform pressure being applied to the web through the nip. Water passes into the felt and into the open holes 20 and blind drilled holes 21 and 22, and is thrown off on the offrunning side, and the felt is dried. A more uniform and better transfer of water occurs than with conventional suction roll drilling patterns with all through drilled holes or with the other forms of roll openings including conventional blind drilled openings, grooved rolls or fabric sleeve covers.
Thus, it will be seen that we have provided an improved press roll structure which accomplishe~ advantages and ob~ectives above set forth, and we do not intend to be limited to the specific orm of invention disclosed, but intend to cover all equivalents and modifications thereof.
Claims (8)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a press couple for dewatering a traveling web in a papermaking machine, the combination comprising:
first and second press means defining a press nip there-between with said second means being a cylindrical press roll shell;
water receiving means for passing through said nip in contact with the roll and carrying a traveling paper web through the nip; and means defining a plurality of holes in the roll surface accommodating travel of water from the web through the water receiving means, said holes including a first group extending axially fully through the shell and a second group of holes being more shallow than the first holes and having a closed inner end.
first and second press means defining a press nip there-between with said second means being a cylindrical press roll shell;
water receiving means for passing through said nip in contact with the roll and carrying a traveling paper web through the nip; and means defining a plurality of holes in the roll surface accommodating travel of water from the web through the water receiving means, said holes including a first group extending axially fully through the shell and a second group of holes being more shallow than the first holes and having a closed inner end.
2. In a press couple for dewatering a traveling web in a papermaking machine constructed in accordance with claim 1 and including:
said water receiving means being a felt.
said water receiving means being a felt.
3. In a press couple for dewatering a traveling web in a papermaking machine constructed in accordance with claim 1 and including:
said first and second holes being alternately positioned on the roll surface.
said first and second holes being alternately positioned on the roll surface.
4. In a press couple for dewatering a traveling web in a papermaking machine constructed in accordance with claim 3:
wherein the depth of the first group is substantially 1/4"
and the second group substantially 3/8".
wherein the depth of the first group is substantially 1/4"
and the second group substantially 3/8".
5. A structure for dewatering a web in a paper machine having a first and second press means defining a press nip, one of said press means comprising:
a rotatable press roll shell having rotary support means and a cylindrical outer shell surface;
and means defining a plurality of holes in the surface of the roll for receiving water expressed from a web adjacent the roll surface subject to pressure, a first group of said holes extending radially fully through the shell and a second group of said holes extending only a portion of the way through said shell.
a rotatable press roll shell having rotary support means and a cylindrical outer shell surface;
and means defining a plurality of holes in the surface of the roll for receiving water expressed from a web adjacent the roll surface subject to pressure, a first group of said holes extending radially fully through the shell and a second group of said holes extending only a portion of the way through said shell.
6. A structure for dewatering a web in a paper machine constructed in accordance with claim 5:
wherein said shell has an outer cover of resilient material and said second group of holes are of a depth no greater than the depth of said resilient cover.
wherein said shell has an outer cover of resilient material and said second group of holes are of a depth no greater than the depth of said resilient cover.
7. A structure for dewatering a web in a paper machine constructed in accordance with claim 5:
wherein said holes include a third group of a depth less than said second group.
wherein said holes include a third group of a depth less than said second group.
8. A structure for dewatering a web in a paper machine constructed in accordance with claim 7:
wherein said first group has a diameter in the range of 0.1 to 0.15", and said second and third groups have a diameter in the range of 0.02 to 0.1".
wherein said first group has a diameter in the range of 0.1 to 0.15", and said second and third groups have a diameter in the range of 0.02 to 0.1".
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/270,364 US4366025A (en) | 1981-06-04 | 1981-06-04 | Suction press roll |
| US270,364 | 1981-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1167677A true CA1167677A (en) | 1984-05-22 |
Family
ID=23031043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000399701A Expired CA1167677A (en) | 1981-06-04 | 1982-03-29 | Suction press roll |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4366025A (en) |
| JP (1) | JPS5926717B2 (en) |
| KR (1) | KR860001623B1 (en) |
| CA (1) | CA1167677A (en) |
| ES (1) | ES512747A0 (en) |
| GB (1) | GB2099957B (en) |
| ID (1) | ID1003B (en) |
| IN (1) | IN156316B (en) |
| IT (1) | IT1151423B (en) |
| MX (1) | MX157926A (en) |
| PH (1) | PH19886A (en) |
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| US4781795A (en) * | 1986-04-08 | 1988-11-01 | Ray R. Miller | Heated drum having high thermal flux and belt press using same |
| US4710271A (en) * | 1986-04-08 | 1987-12-01 | Ray R. Miller | Belt and drum-type press |
| US4758310A (en) * | 1986-04-08 | 1988-07-19 | Miller Ray R | Belt and drum-type pressing apparatus |
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| US4740305A (en) * | 1986-10-23 | 1988-04-26 | Miller Ray R | Method and apparatus for treatment of a permeable web with a fluid |
| JPH0437656Y2 (en) * | 1986-11-18 | 1992-09-03 | ||
| CA1314747C (en) * | 1987-08-27 | 1993-03-23 | Leroy H. Busker | Apparatus and method for removing fluid from a fibrous web |
| US4998658A (en) * | 1988-12-27 | 1991-03-12 | Eastman Kodak Company | Drilled unported vacuum drum with a porous sleeve |
| US4948467A (en) * | 1989-05-17 | 1990-08-14 | The Black Clawson Company | Extended nip press with induced repulsion |
| US5082533A (en) * | 1990-04-10 | 1992-01-21 | Beloit Corporation | Heated extended nip press with porous roll layers |
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| US5470471A (en) * | 1993-05-14 | 1995-11-28 | Ingersoll-Rand Company | Anti-rewet deck for press rolls |
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| EP0777781B1 (en) * | 1994-08-22 | 1999-11-10 | Beloit Technologies, Inc. | A pulp slurry-handling press roll, and twin roll and single roll slurry-handling presses |
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| JP3861951B2 (en) * | 1997-10-01 | 2006-12-27 | Ｂｅｌｌｍａｔｉｃ株式会社 | Assembled roll |
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| SE518032C2 (en) * | 2000-12-18 | 2002-08-20 | Tetra Laval Holdings & Finance | Methods and apparatus for producing a packaging material |
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| US6981935B2 (en) * | 2002-09-12 | 2006-01-03 | Stowe Woodward, L.L.C. | Suction roll with sensors for detecting temperature and/or pressure |
| US6874232B2 (en) * | 2003-05-21 | 2005-04-05 | Stowe Woodward, Llc | Method for forming cover for industrial roll |
| JP2007536183A (en) * | 2004-05-07 | 2007-12-13 | ボイス パテント ゲーエムベーハー | Suction roll in a machine producing fiber material web |
| US7572214B2 (en) * | 2005-05-04 | 2009-08-11 | Stowe Woodward L.L.C. | Suction roll with sensors for detecting operational parameters having apertures |
| DE102005036891A1 (en) * | 2005-08-05 | 2007-02-08 | Voith Patent Gmbh | Machine for the production of tissue paper |
| US10287731B2 (en) | 2005-11-08 | 2019-05-14 | Stowe Woodward Licensco Llc | Abrasion-resistant rubber roll cover with polyurethane coating |
| DE102007003592B3 (en) * | 2007-01-24 | 2008-07-03 | WINKLER + DüNNEBIER AG | Suction roll i.e. blank separating roll, for transporting flat material cut-out i.e. label cut-out, in e.g. label manufacturing machine, has slot covering arranged on lateral surface such that through-holes align with suction slots |
| US9097595B2 (en) * | 2008-11-14 | 2015-08-04 | Stowe Woodward, L.L.C. | System and method for detecting and measuring vibration in an industrial roll |
| US8346501B2 (en) * | 2009-06-22 | 2013-01-01 | Stowe Woodward, L.L.C. | Industrial roll with sensors arranged to self-identify angular location |
| US8236141B2 (en) * | 2009-06-23 | 2012-08-07 | Stowe Woodward, L.L.C. | Industrial roll with sensors having conformable conductive sheets |
| DE102009028215B3 (en) * | 2009-08-04 | 2010-09-09 | Voith Patent Gmbh | Combination of a press felt with a press roll cover and / or a suction roll cover for a paper machine |
| JP2011121680A (en) * | 2009-12-09 | 2011-06-23 | Seiko Epson Corp | Conveyed medium conveying device and image forming device |
| CN101920860B (en) * | 2010-04-10 | 2012-02-15 | 佛山市宝索机械制造有限公司 | Coreless paper roll rerewinder in no need of auxiliary winding plate |
| US8475347B2 (en) | 2010-06-04 | 2013-07-02 | Stowe Woodward Licensco, Llc | Industrial roll with multiple sensor arrays |
| CN102373643A (en) * | 2010-08-09 | 2012-03-14 | 河南省江河纸业有限责任公司 | Vacuum press roll |
| CA2851401C (en) | 2012-01-17 | 2017-03-28 | Stowe Woodward Licensco, Llc | System and method of determining the angular position of a rotating roll |
| SE538068C2 (en) * | 2013-12-19 | 2016-02-23 | Valmet Oy | Arrangement and procedure for mass production |
| JP6287365B2 (en) * | 2014-03-07 | 2018-03-07 | セイコーエプソン株式会社 | Sheet manufacturing equipment |
| JP6269181B2 (en) | 2014-03-07 | 2018-01-31 | セイコーエプソン株式会社 | Sheet manufacturing equipment |
| US9650744B2 (en) | 2014-09-12 | 2017-05-16 | Stowe Woodward Licensco Llc | Suction roll with sensors for detecting operational parameters |
| US10221525B2 (en) | 2016-04-26 | 2019-03-05 | Stowe Woodward Licensco, Llc | Suction roll with pattern of through holes and blind drilled holes that improves land distance |
| CN110804894B (en) * | 2019-11-14 | 2021-01-08 | 江苏理文造纸有限公司 | Paper pulp dewatering equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1596775A (en) * | 1925-04-04 | 1926-08-17 | Stephansen Julius | Combined suction and pressure drum for pulp, cellulose, and the like |
| US3023805A (en) * | 1960-02-29 | 1962-03-06 | Beloit Iron Works | Transfer press |
| US3562883A (en) * | 1968-06-26 | 1971-02-16 | Shogo Kobayashi | Suction press roll for papermaking |
| US3826713A (en) * | 1968-08-19 | 1974-07-30 | Tampella Oy Ab | Paper machine press section and method for using same |
-
1981
- 1981-06-04 US US06/270,364 patent/US4366025A/en not_active Expired - Lifetime
-
1982
- 1982-03-29 CA CA000399701A patent/CA1167677A/en not_active Expired
- 1982-05-10 PH PH27253A patent/PH19886A/en unknown
- 1982-05-12 GB GB8213736A patent/GB2099957B/en not_active Expired
- 1982-05-24 JP JP57086698A patent/JPS5926717B2/en not_active Expired
- 1982-05-25 ID IDP401382A patent/ID1003B/en unknown
- 1982-06-01 IN IN629/CAL/82A patent/IN156316B/en unknown
- 1982-06-01 ES ES512747A patent/ES512747A0/en active Granted
- 1982-06-02 IT IT21638/82A patent/IT1151423B/en active
- 1982-06-04 KR KR8202519A patent/KR860001623B1/en active
- 1982-06-04 MX MX193008A patent/MX157926A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES8305870A1 (en) | 1983-05-01 |
| IN156316B (en) | 1985-06-22 |
| IT1151423B (en) | 1986-12-17 |
| GB2099957A (en) | 1982-12-15 |
| KR860001623B1 (en) | 1986-10-14 |
| KR840000710A (en) | 1984-02-27 |
| PH19886A (en) | 1986-08-13 |
| GB2099957B (en) | 1985-08-21 |
| MX157926A (en) | 1988-12-21 |
| ID1003B (en) | 1996-10-11 |
| US4366025A (en) | 1982-12-28 |
| ES512747A0 (en) | 1983-05-01 |
| JPS57205594A (en) | 1982-12-16 |
| JPS5926717B2 (en) | 1984-06-29 |
| IT8221638A0 (en) | 1982-06-02 |
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