WO1990002639A1 - Apparatus for handling sheet material - Google Patents

Apparatus for handling sheet material Download PDF

Info

Publication number
WO1990002639A1
WO1990002639A1 PCT/GB1989/001027 GB8901027W WO9002639A1 WO 1990002639 A1 WO1990002639 A1 WO 1990002639A1 GB 8901027 W GB8901027 W GB 8901027W WO 9002639 A1 WO9002639 A1 WO 9002639A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool bearing
bearing elements
cylinder
movable
tool
Prior art date
Application number
PCT/GB1989/001027
Other languages
French (fr)
Inventor
Keith Alan Lewis
Michael Weller
Original Assignee
Doverstar Machinery Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Doverstar Machinery Limited filed Critical Doverstar Machinery Limited
Priority to KR1019900701252A priority Critical patent/KR960012031B1/en
Publication of WO1990002639A1 publication Critical patent/WO1990002639A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B26F1/20—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material with tools carried by a rotating drum or similar support

Definitions

  • the present invention relates to apparatus for handling sheet material.
  • the invention is particularly applicable to machinery for cross perforating and/or creasing lines across the width of a web of paper, suitable for continuous stationery such as computer paper.
  • Conventional cross perforating machines at present include cylinders which carry blades to perforate the web of paper as it passes over an anvil cylinder. These perforating cylinders can vary in size (by circumference) to enable different spacings between perforations thus giving a wide range of finished "sheet" lengths.
  • the present invention provides apparatus for handling sheet material comprising means for conveying the material and a plurality of rotatable tool bearing elements positioned at spaced locations along the path of travel of the material, each tool bearing element being movable from an inoperative position to an operative position in which the tool acts on the material in use.
  • the tool bearing elements may each carry a blade or blades for perforating or creasing the material and they may be of the same or different diameters.
  • the apparatus may be used to perforate a continuous web of material into sheets and the length of sheet may be chosen by bringing the appropriate tool bearing member into its operative position.
  • the present invention may provide a machine for perforating sheet material in which the sheet length can be readily changed without the need to completely remove one cylinder and replace it with another.
  • the apparatus according to the invention comprises means for moving linearly one, some or all of the tool bearing elements.
  • the conveying means includes a movable surface over which the material is conveyed in use and the tool bearing elements are movable in a direction perpendicular to the movable surface.
  • the movable surface may comprise a cylinder rotatably mounted on a support structure of .the apparatus.
  • a practical embodiment of the invention would preferably include a drive mechanism driving the tool bearing elements to rotate and means for moving the tool bearing elements towards and away from their operative positions.
  • the moving means preferably includes means for preventing disengagement of the tool bearing elements from the drive mechanism.
  • the tool bearing elements may advantageously be arranged to be moved so that in their inoperative position they are . still engaged with the drive mechanism.
  • the tool bearing elements are each mounted on one or more mounting members which are movable along slots formed in a support structure of the apparatus.
  • Figure 1 is a schematic side elevation of a machine for perforating a continuous web of material constructed in accordance with the invention.
  • Figure 2 is a cross-section along the line II- II of Figure 1.
  • the apparatus shown in the drawings includes tool bearing members or perforating cylinders 2, 3 each carrying a blade 7 for perforating a continuous web of paper 10 as it passes over an anvil cylinder 1.
  • the cylinders 2, 3 have different diameters.
  • the perforating cylinders 2, 3 are each provided with mounting blocks 6 attached one at each end of each cylinder.
  • the perforating cylinders 2, 3 are free to rotate between their respective blocks 6 by means of bearings secured inside the blocks.
  • the bearings have been omitted from Figure 2 for the sake of clarity. It will be appreciated that conventional bearings may be used for this purpose.
  • the cylinders 2, 3 are driven by means of respective gears, which are fixed to the cylinders and which engage with a gear attached to the anvil cylinder 1.
  • Figure 2 shows a gear 20 attached to cylinder 2 engaging a gear 15 attached to the anvil cylinder 1.
  • the gear 15 is driven by a suitable motor and drive mechanism, not shown.
  • the blocks are located in the machine by means of slots 8 defined within the machine and precisely located around the anvil cylinder 1.
  • the slots 8 are formed in support walls 16 and 17.
  • the anvil cylinder 1 is rotatably mounted between the support walls by means of bearings, not shown.
  • the blocks 6 are free to slide up and down in their respective slots 8.
  • a mounting bar 4 Positioned at the extreme end of each slot, e.g. the top of the upper slot shown in the figure, is a mounting bar 4 which is secured to the respective support wall 16, 17 and not normally free to move unless total removal is required, eg: for repair.
  • Each mounting bar is provided with a "trapped" jacking device 5.
  • Each jacking device comprises a collar 5A, a head 5B and shaft 5C having a threaded end.
  • the hexagonal head shown in the drawings could be replaced by a gear wheel, chain sprocket, pulley, worm wheel or any other suitable device which enables remote operation.
  • the portion of the shaft 5C between the head 5B and the collar 5A passes through a hole in the mounting bar 4 so that the jacking device is rotatable with respect to the mounting bar.
  • the shaft and collar may be formed integrally and the head welded to the shaft after the shaft has been passed through the hole in the mounting bar 4.
  • a clamping device may optionally be provided for fixing the jacking bolt against the bar 4 to prevent it from moving.
  • the threaded end of the shaft passes through a threaded hole in the mounting block.
  • the arrangement is such that one jacking device 5 is provided for each block 6. This may be achieved by providing a single mounting bar 4 bridging the support walls and carrying two jacking devices, or two mounting bars 4 may be provided, as illustrated, one for each block, each having a single jacking device 5.
  • This arrangement enables the cylinder mounting blocks 6 to be driven along their respective slots 8 towards or away from the anvil cylinder 1 by rotating the head 5B of jacking device 5. It is essential for this operation that the mounting bars 4 be fixed with respect to the machine.
  • a particularly advantageous feature of this machine is that the thickness of the collar 5A of the jacking device 5 limits the amount by which the cylinder assembly can be lifted.
  • the limit of retraction of the cylinder assemblies is advantageously set so that the gears of the perforating cylinders do not disengage from the gear of the anvil cylinder 1.
  • the blocks 6 abut against the collar 5A when the corresponding perforating cylinder 2 or 3 is fully retracted and in this position the gear of the cylinder, eg: 20 remains in engagement with the gear 15 of the anvil cylinder 1. This avoids the need to realign the gears each time one of the perforating cylinders is brought into use from its inoperative position.
  • this is not an essential feature of the invention.
  • the machine described above enables a user to select the size of cylinder required. Upon doing so, the selected cylinder can be moved until the cylinder mounting blocks 6 reach the end of their respective slot 8. When this is achieved, the cylinder assembly is set to perform the function of the machine. The manufacturing dimensions of the parts of the machine are set so that when the blocks 6 are at the end of their respective slot 8, the blade 7 of the perforating cylinder is the correct distance from the anvil cylinder 1.
  • the unused cylinders are "jacked away” by means of the jacking devices 5 so that a clearance gap (x) exists between the web and the unrequired blade.
  • the block 6 is moved to a position in which it is clamped against the collar 5A to ensure that it does not "creep down", for example as the machine vibrates in use.
  • the invention enables a combination of tool bearing members to be used at the same time.
  • a combination of cylinder sizes can be used at the same time to achieve variations in the required perforating positions.
  • the or each tool bearing member or cylinder may carry more than one tool.
  • the or each of the cylinders 2,3 could carry several blades.
  • the cylinders could be of the same diameter and/or carry different numbers of blades.
  • they could be identical in all respects and phased to cut the material at different positions.
  • the moving mechanism could be used to shift a cylinder to its inoperative position and change the pattern of cuts or creases for example.
  • any suitable support structure may be used to support the various components of the machine described above.
  • the various components have been described as being supported between two fixed walls they may equally well be supported on an open framework, possibly enclosed in a protective housing.

Abstract

Apparatus for handling sheet material, such as a machine for perforating a continuous length of paper, comprises several rotatable tool bearing elements (2, 3) arranged at spaced locations along the path of travel of the material. Each tool bearing element is movable from an inoperative position (see 3) to an operative position (see 2). Preferably the tool bearing elements are movable in a direction perpendicular to a surface (1) over which the material is conveyed.

Description

Apparatus for Handling Sheet Material
The present invention relates to apparatus for handling sheet material. The invention is particularly applicable to machinery for cross perforating and/or creasing lines across the width of a web of paper, suitable for continuous stationery such as computer paper.
Conventional cross perforating machines at present include cylinders which carry blades to perforate the web of paper as it passes over an anvil cylinder. These perforating cylinders can vary in size (by circumference) to enable different spacings between perforations thus giving a wide range of finished "sheet" lengths.
In conventional machines various arrangements have been proposed for changing the size of perforating cylinder. In some machines changing the size of perforating cylinder is achieved by simply lifting one cylinder out of the machine and replacing it with another. -Some machines are provided with cylinders at fixed positions which may be thrown off by means of eccentric housings. In other machines a carousel carrying several cylinders is provided which may be indexed round to the required size.
The present invention provides apparatus for handling sheet material comprising means for conveying the material and a plurality of rotatable tool bearing elements positioned at spaced locations along the path of travel of the material, each tool bearing element being movable from an inoperative position to an operative position in which the tool acts on the material in use.
The tool bearing elements may each carry a blade or blades for perforating or creasing the material and they may be of the same or different diameters. Thus, the apparatus may be used to perforate a continuous web of material into sheets and the length of sheet may be chosen by bringing the appropriate tool bearing member into its operative position.
Thus, the present invention may provide a machine for perforating sheet material in which the sheet length can be readily changed without the need to completely remove one cylinder and replace it with another.
Preferably the apparatus according to the invention comprises means for moving linearly one, some or all of the tool bearing elements.
In the preferred embodiment of the invention the conveying means includes a movable surface over which the material is conveyed in use and the tool bearing elements are movable in a direction perpendicular to the movable surface. With the direction of movement of the tool bearing elements being perpendicular to the movable surface rather than, say, parallel, the arrangement is particularly space efficient. The movable surface may comprise a cylinder rotatably mounted on a support structure of .the apparatus.
A practical embodiment of the invention would preferably include a drive mechanism driving the tool bearing elements to rotate and means for moving the tool bearing elements towards and away from their operative positions. The moving means preferably includes means for preventing disengagement of the tool bearing elements from the drive mechanism. In other words, the tool bearing elements may advantageously be arranged to be moved so that in their inoperative position they are . still engaged with the drive mechanism.
In the preferred embodiment of the invention the tool bearing elements are each mounted on one or more mounting members which are movable along slots formed in a support structure of the apparatus.
An embodiment of the invention will now be described by way of example only and with reference to the accompanying drawings in which:
Figure 1.is a schematic side elevation of a machine for perforating a continuous web of material constructed in accordance with the invention, and
Figure 2 is a cross-section along the line II- II of Figure 1.
The apparatus shown in the drawings includes tool bearing members or perforating cylinders 2, 3 each carrying a blade 7 for perforating a continuous web of paper 10 as it passes over an anvil cylinder 1. The cylinders 2, 3 have different diameters.
The perforating cylinders 2, 3 are each provided with mounting blocks 6 attached one at each end of each cylinder. The perforating cylinders 2, 3 are free to rotate between their respective blocks 6 by means of bearings secured inside the blocks. The bearings have been omitted from Figure 2 for the sake of clarity. It will be appreciated that conventional bearings may be used for this purpose. The cylinders 2, 3 are driven by means of respective gears, which are fixed to the cylinders and which engage with a gear attached to the anvil cylinder 1. Figure 2 shows a gear 20 attached to cylinder 2 engaging a gear 15 attached to the anvil cylinder 1. The gear 15 is driven by a suitable motor and drive mechanism, not shown.
The blocks are located in the machine by means of slots 8 defined within the machine and precisely located around the anvil cylinder 1. In the arrangement shown the slots 8 are formed in support walls 16 and 17. The anvil cylinder 1 is rotatably mounted between the support walls by means of bearings, not shown. The blocks 6 are free to slide up and down in their respective slots 8. Positioned at the extreme end of each slot, e.g. the top of the upper slot shown in the figure, is a mounting bar 4 which is secured to the respective support wall 16, 17 and not normally free to move unless total removal is required, eg: for repair. Each mounting bar is provided with a "trapped" jacking device 5. Each jacking device comprises a collar 5A, a head 5B and shaft 5C having a threaded end. The hexagonal head shown in the drawings could be replaced by a gear wheel, chain sprocket, pulley, worm wheel or any other suitable device which enables remote operation.The portion of the shaft 5C between the head 5B and the collar 5A passes through a hole in the mounting bar 4 so that the jacking device is rotatable with respect to the mounting bar. The shaft and collar may be formed integrally and the head welded to the shaft after the shaft has been passed through the hole in the mounting bar 4. However, any alternative means of assembly may be used. Also, a clamping device may optionally be provided for fixing the jacking bolt against the bar 4 to prevent it from moving.
The threaded end of the shaft passes through a threaded hole in the mounting block. The arrangement is such that one jacking device 5 is provided for each block 6. This may be achieved by providing a single mounting bar 4 bridging the support walls and carrying two jacking devices, or two mounting bars 4 may be provided, as illustrated, one for each block, each having a single jacking device 5.
This arrangement enables the cylinder mounting blocks 6 to be driven along their respective slots 8 towards or away from the anvil cylinder 1 by rotating the head 5B of jacking device 5. It is essential for this operation that the mounting bars 4 be fixed with respect to the machine.
A particularly advantageous feature of this machine is that the thickness of the collar 5A of the jacking device 5 limits the amount by which the cylinder assembly can be lifted. The limit of retraction of the cylinder assemblies is advantageously set so that the gears of the perforating cylinders do not disengage from the gear of the anvil cylinder 1. In other words, the blocks 6 abut against the collar 5A when the corresponding perforating cylinder 2 or 3 is fully retracted and in this position the gear of the cylinder, eg: 20 remains in engagement with the gear 15 of the anvil cylinder 1. This avoids the need to realign the gears each time one of the perforating cylinders is brought into use from its inoperative position. However, it should be noted that this is not an essential feature of the invention.
The machine described above enables a user to select the size of cylinder required. Upon doing so, the selected cylinder can be moved until the cylinder mounting blocks 6 reach the end of their respective slot 8. When this is achieved, the cylinder assembly is set to perform the function of the machine. The manufacturing dimensions of the parts of the machine are set so that when the blocks 6 are at the end of their respective slot 8, the blade 7 of the perforating cylinder is the correct distance from the anvil cylinder 1.
Having set the required cylinder to its "down" position, the unused cylinders are "jacked away" by means of the jacking devices 5 so that a clearance gap (x) exists between the web and the unrequired blade. In the fully retracted position, the block 6 is moved to a position in which it is clamped against the collar 5A to ensure that it does not "creep down", for example as the machine vibrates in use.
The invention enables a combination of tool bearing members to be used at the same time. For example, in the machine described above a combination of cylinder sizes can be used at the same time to achieve variations in the required perforating positions.
It will be appreciated that various modifications may be made to the arrangement described above in accordance with the present invention. For example, the or each tool bearing member or cylinder may carry more than one tool. Thus, the or each of the cylinders 2,3 could carry several blades. The cylinders could be of the same diameter and/or carry different numbers of blades. In another possible arrangement they could be identical in all respects and phased to cut the material at different positions. With such an arrangement the moving mechanism could be used to shift a cylinder to its inoperative position and change the pattern of cuts or creases for example.
It will be appreciated that any suitable support structure may be used to support the various components of the machine described above. Thus, whilst the various components have been described as being supported between two fixed walls they may equally well be supported on an open framework, possibly enclosed in a protective housing.

Claims

Claims :
1. Apparatus for handling sheet material comprising means for conveying the material and a plurality of rotatable tool bearing elements positioned at spaced locations along the path of travel of the material, each tool bearing element being movable from an inoperative position to an operative position in which the tool acts on the material in use.
2. Apparatus as claimed in claim 1 including means for moving one, some or all of the tool bearing elements linearly from the operative position to the inoperative position.
3. Apparatus as claimed in claim 1 or 2 in which the tool bearing elements are cylindrical and are mounted for rotation about their respective cylindrical axes.
4. Apparatus as claimed in claim 3, in which the cylinders have different diameters.
5. Apparatus as claimed in any preceding claim in which each tool bearing element carries at least one blade for creasing or perforating the material.
6. Apparatus as claimed in any preceding claim in which the conveying means includes a movable surface over which the material is conveyed in use, and the tool bearing elements are movable in a direction perpendicular to the movable surface.
7. Apparatus as claimed in any preceding claim including a drive mechanism for driving the tool bearing elements to rotate and means for moving the tool bearing elements towards and away from their respective operative positions, said moving means including means for preventing disengagement of the tool bearing elements from the drive mechanism.
8. Apparatus as claimed in any preceding claim comprising a cylinder over which the material is conveyed in use.
9. Apparatus as claimed in claim 8 in which the tool bearing elements are arranged around the cylinder.
10. Apparatus as claimed in claim 8 or 9 in which the cylinder is rotatably mounted on a support structure of the apparatus and is driven in use to rotate about its cylindrical axis, the rotatable tool bearing elements being drivingly connected to the cylinder whereby rotation of said cylinder causes rotation of the tool bearing elements.
11. Apparatus as claimed in any preceding claim in which at least one tool bearing element is rotatably mounted on a mounting member which is located in a slot formed in a support structure of said apparatus so as to be movable therealong.
12. Apparatus as claimed in any of claims 1 to 10 in which each tool bearing element is rotatably mounted between two mounting members which are located in respective slots formed in a support structure of said apparatus so as to be movable therealong.
13. Apparatus as claimed in claim 11 or 12, in which the or each mounting member is movable by means of a screw which is rotatably mounted with respect to said support structure and engages a corresponding thread in the mounting member.
14. Apparatus as claimed in claim 13 in which the or each screw is provided with a collar for limiting movement of said mounting member.
PCT/GB1989/001027 1988-09-05 1989-09-01 Apparatus for handling sheet material WO1990002639A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900701252A KR960012031B1 (en) 1988-10-06 1989-10-06 Casting mold for slip casting

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8820817.8 1988-09-05
GB888820817A GB8820817D0 (en) 1988-09-05 1988-09-05 Apparatus for handling sheet material

Publications (1)

Publication Number Publication Date
WO1990002639A1 true WO1990002639A1 (en) 1990-03-22

Family

ID=10643093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/001027 WO1990002639A1 (en) 1988-09-05 1989-09-01 Apparatus for handling sheet material

Country Status (2)

Country Link
GB (1) GB8820817D0 (en)
WO (1) WO1990002639A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481095A1 (en) * 1990-05-01 1992-04-22 Nippon Petrochemicals Co., Ltd. Device for forming slits
WO2000006351A1 (en) * 1998-07-27 2000-02-10 Fabio Perini S.P.A. Perforator for weblike materials with means for modifying the interval between consecutive lines of perforations
WO2016148899A1 (en) * 2015-03-17 2016-09-22 The Procter & Gamble Company Apparatus for perforating a web material
US10889459B2 (en) 2015-03-17 2021-01-12 The Procter & Gamble Company Method for perforating a nonlinear line of weakness
US10947671B2 (en) 2017-09-11 2021-03-16 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US10960566B2 (en) 2015-03-17 2021-03-30 The Procter & Gamble Company Apparatus for perforating a nonlinear line of weakness
US11254024B2 (en) 2013-06-12 2022-02-22 The Procter & Gamble Company Method of perforating a nonlinear line of weakness
US11745378B2 (en) 2013-06-12 2023-09-05 The Procter & Gamble Company Nonlinear line of weakness formed by a perforating apparatus
US11806889B2 (en) 2017-09-11 2023-11-07 The Procter & Gamble Company Perforating apparatus and method for manufacturing a shaped line of weakness
US11806890B2 (en) 2017-09-11 2023-11-07 The Procter & Gamble Company Perforating apparatus and method for manufacturing a shaped line of weakness
US11952722B2 (en) 2021-04-20 2024-04-09 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261690A (en) * 1925-05-18 1926-11-18 Cameron Machine Co Improvements in slitting machines
GB461928A (en) * 1935-11-20 1937-02-26 Vickers Armstrongs Ltd Improvements in or relating to cutting machines, scoring machines or the like
US3376774A (en) * 1966-01-24 1968-04-09 Adamson United Co Slitter and adjustable edge trimmer for a continuously moving web
EP0077127A2 (en) * 1981-09-14 1983-04-20 Appleton Papers Inc. Slitter apparatus
GB2174948A (en) * 1985-05-17 1986-11-19 Grapha Holding Ag Apparatus for the transverse perforation of webs of paper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261690A (en) * 1925-05-18 1926-11-18 Cameron Machine Co Improvements in slitting machines
GB461928A (en) * 1935-11-20 1937-02-26 Vickers Armstrongs Ltd Improvements in or relating to cutting machines, scoring machines or the like
US3376774A (en) * 1966-01-24 1968-04-09 Adamson United Co Slitter and adjustable edge trimmer for a continuously moving web
EP0077127A2 (en) * 1981-09-14 1983-04-20 Appleton Papers Inc. Slitter apparatus
GB2174948A (en) * 1985-05-17 1986-11-19 Grapha Holding Ag Apparatus for the transverse perforation of webs of paper

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313863A (en) * 1990-05-01 1994-05-24 Nippon Petrochemicals Co., Ltd. Apparatus for forming slits
EP0481095B1 (en) * 1990-05-01 1995-02-15 Nippon Petrochemicals Co., Ltd. Device for forming slits
EP0481095A1 (en) * 1990-05-01 1992-04-22 Nippon Petrochemicals Co., Ltd. Device for forming slits
WO2000006351A1 (en) * 1998-07-27 2000-02-10 Fabio Perini S.P.A. Perforator for weblike materials with means for modifying the interval between consecutive lines of perforations
US6431491B1 (en) 1998-07-27 2002-08-13 Fabio Perini S.P.A. Perforator for weblike materials with means for modifying the interval between consecutive lines of perforations
US11254024B2 (en) 2013-06-12 2022-02-22 The Procter & Gamble Company Method of perforating a nonlinear line of weakness
US11745378B2 (en) 2013-06-12 2023-09-05 The Procter & Gamble Company Nonlinear line of weakness formed by a perforating apparatus
US11697219B2 (en) 2013-06-12 2023-07-11 The Procter & Gamble Company Method of perforating a nonlinear line of weakness
US11661301B2 (en) 2015-03-17 2023-05-30 The Procter & Gamble Company Method for perforating a nonlinear line of weakness
WO2016148899A1 (en) * 2015-03-17 2016-09-22 The Procter & Gamble Company Apparatus for perforating a web material
US10960566B2 (en) 2015-03-17 2021-03-30 The Procter & Gamble Company Apparatus for perforating a nonlinear line of weakness
US10889459B2 (en) 2015-03-17 2021-01-12 The Procter & Gamble Company Method for perforating a nonlinear line of weakness
US10919168B2 (en) 2015-03-17 2021-02-16 The Procter & Gamble Company Apparatus for perforating a web material
US11584034B2 (en) 2015-03-17 2023-02-21 The Procter & Gamble Company Apparatus for perforating a nonlinear line of weakness
US11413779B2 (en) 2015-03-17 2022-08-16 The Procter & Gamble Company Apparatus for perforating a web material
US11407608B2 (en) 2015-03-17 2022-08-09 The Procter & Gamble Company Method for perforating a nonlinear line of weakness
US11268243B2 (en) 2017-09-11 2022-03-08 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US10947671B2 (en) 2017-09-11 2021-03-16 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11180892B2 (en) 2017-09-11 2021-11-23 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11668051B2 (en) 2017-09-11 2023-06-06 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11008709B2 (en) 2017-09-11 2021-05-18 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11008710B2 (en) 2017-09-11 2021-05-18 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness
US11806889B2 (en) 2017-09-11 2023-11-07 The Procter & Gamble Company Perforating apparatus and method for manufacturing a shaped line of weakness
US11806890B2 (en) 2017-09-11 2023-11-07 The Procter & Gamble Company Perforating apparatus and method for manufacturing a shaped line of weakness
US11952722B2 (en) 2021-04-20 2024-04-09 The Procter & Gamble Company Sanitary tissue product with a shaped line of weakness

Also Published As

Publication number Publication date
GB8820817D0 (en) 1988-10-05

Similar Documents

Publication Publication Date Title
WO1990002639A1 (en) Apparatus for handling sheet material
US7419149B2 (en) Paper sheet processing device
KR900003644B1 (en) Machine for slitting continuous tapes into stripes in partticular with cutting cylinders having variable site
US6138544A (en) Die-cutter with planetary configuration
US3956974A (en) Device for breaking out scrap pieces from a punched sheet
US4506575A (en) Core slabber
KR950010677B1 (en) Apparatus for changing the frequency of motion of a pusher
FI101461B (en) Apparatus for cutting flat objects, especially multilayer printing presses
US7182010B2 (en) Apparatus and process for producing different hole patterns in sheet-shaped print materials
FI86155C (en) ANORDNING FOER SELEKTIV ELLER SAMTIDIG TVAERFOERSKJUTNING AV SKAERORGAN I EN MASKIN FOER KAPNING OCH ELLER SKAERNING AV MATERIAL TILL ARK.
EP0138422A1 (en) Crimp blade holder
US6173633B1 (en) Variable length rotary cutting system
AU636450B2 (en) Machine for the discharge and lengthwise cutting of a strip of material running past it
US5152204A (en) Clam shell die cutter
JPH0433699B2 (en)
US7028596B1 (en) Rotary cutting unit
US4422630A (en) Blade holder and method of using the same
CN210161213U (en) Divide strip machine and accent sword subassembly thereof
US4265155A (en) Slitter having pivotal multiple spaced pairs of arbors
US6231492B1 (en) Cutting drum having circumferentially adjustable cutting blades for use on a rotary press folding machine
EP0999016B1 (en) Cutter for cross cutting of webs
EP1119445B1 (en) Punching unit
EP0496560B1 (en) Method and apparatus for roll forming strip material
EP0236499A1 (en) Die interchanging device for rotary die cutters
CN212312153U (en) Cutting mechanism of circuit board

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DE GB JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642