GB2193676A - Separating sheets from a web - Google Patents

Separating sheets from a web Download PDF

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Publication number
GB2193676A
GB2193676A GB8718045A GB8718045A GB2193676A GB 2193676 A GB2193676 A GB 2193676A GB 8718045 A GB8718045 A GB 8718045A GB 8718045 A GB8718045 A GB 8718045A GB 2193676 A GB2193676 A GB 2193676A
Authority
GB
United Kingdom
Prior art keywords
web
sheet
separator
sheets
rollers
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.)
Withdrawn
Application number
GB8718045A
Other versions
GB8718045D0 (en
Inventor
Thomas George Gilmore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AUTOBOND Ltd
Original Assignee
AUTOBOND Ltd
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 AUTOBOND Ltd filed Critical AUTOBOND Ltd
Publication of GB8718045D0 publication Critical patent/GB8718045D0/en
Publication of GB2193676A publication Critical patent/GB2193676A/en
Withdrawn legal-status Critical Current

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
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/10—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with devices for breaking partially-cut or perforated webs, e.g. bursters
    • 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
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
    • B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/002—Precutting and tensioning or breaking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/22—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of both discrete and continuous layers
    • B32B37/223—One or more of the layers being plastic

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Collation Of Sheets And Webs (AREA)
  • Replacement Of Web Rolls (AREA)

Abstract

A sheet separator is provided for separating sheets from a web 10 of sheets arranged in end-to-end overlapping relationship coated on one side with a continuous film of polyester and comprises feed means 12-16 and (18, Fig. 2) for moving the web past a cutter 28 which removes only film from an area the axis of which is transverse to the longitudinal axis of the web 10 at an overlapping area and tensioning means 30, 36 downstream of the cutter for separating one sheet from its neighbour by causing the film to tear starting at said area. A cutter may be provided at each edge of the web. In a modification the cutter extends the whole width of the web and the tensioning rollers are omitted. <IMAGE>

Description

SPECIFICATION Improvements in or relating to coated paper production apparatus The present invention concerns improvements in or relating to paper production apparatus, especially but not exclusively to apparatus for separating sheets of paper from a continuous web comprising a series of sheets arranged, generally, in end-to-end relationship and coated with a continuous polyester film.
A decorative or protective film of clear plastics material is often applied to printed sheets to be used, for example, as book jackets. The laminating operation is carried out on a machine which feeds a series of separate sheets to a laminating station where the sheets, with an edge portion of one overlapping or underlapping its neighbour, has a continuous film of clear plastics material laminated thereto. It will be realised therefore that the product of the machine is a roll of paper sheets arranged in end-to-end overlapping relationship coated on one side with a continuous film of plastics. A web of sheets of this nature will be referred to hereinafter as "laminated sheets of the type defined".
It is then necessary to return the sheets to their separate condition for further processing and in view of the automated nature of this further processing it is essential that the size of the sheets remains unaltered. It will be realised therefore that a simple guillotine operation to separate one sheet from its neighbour cannot take place as this would result in at least one part of the sheet being lost.
Our co-pending UK Patent Application 8405654 relates to a sheet separator for laminated sheets of the type defined. It has been found that this prior sheet separator has operated in a satisfactory manner with most com monly used clear plastics material films but has not always functioned reliably with poiy- ester films which have a greater tear resistance.
It is an object of the present invention to provide a machine which separates the sheets from laminated sheets without altering the size of the sheets when the film is of a polyester or other material which resists tearing.
According to the present invention there is provided a sheet separator for laminated sheets of the type defined, comprising feed means for a web of laminated sheets, cutter means for removing only the film lamination over an area extending in a direction substantially transverse to the longitudinal axis of the web at an overlapping of sheets and, downstream of said cutter means, a tensioning arrangement for applying tension to the web whereby the lamination rips along the overlapped edge of a sheet.
Preferably the cutter means comprises a plurality of helically arranged blades disposed about an axis transverse to the longitudinal axis of the web.
Preferably the cutter means are mounted for fine adjustment towards and away from a web support roller thereunder.
Preferably between a supply drum for the web and the cutter means there are provided additional guide rollers, for example an anticurl bar.
Preferably immediately downstream of the cutter means there is provided a pair of pressure rollers defining a nip through which the web is fed. Conveyor means are provided for carrying the web and separated sheets downstream of the pressure rollers and at a distance spaced from the pressure rollers by an amount greater than the length of a separate sheet, there is provided a pair of separating rollers defining a nip therebetween, the separating rollers being driven at a speed greater than the pressure rollers whereby they exert tension on the laminating film of the web intermediate the pressure and separating rollers.
To assist in the separating process there is provided a sheet deflection wheel upstream of the separating rollers to laterally distort the web and assist in the ripping of the film.
Preferably the spacing of the deflection wheel from the pressure rollers is slightly less than the length of a sheet to be separated.
Preferably an adjustable sheet collection tray is located at the discharge from the conveyor means.
According to another aspect of the present invention there is provided a sheet separator for laminated sheets of the type defined, comprising feed means for a web of laminated sheets, cutter means for removing only the film lamination over an area extending in a direction substantially transverse to the longitudinal axis of the web at an overlapping of sheets across the entire width of the sheets.
With the separator defined in the preceding paragraph all the film lamination joining one sheet to a neighbouring sheet is removed such that tensioning arrangements for applying tension to the web to cause the lamination to rip become unnecessary.
An embodiment of the present invention will now be described by way for example only with reference to the accompanying drawings, in which: Fig. 1 shows a diagrammatic plan of a sheet separating apparatus; and Fig. 2 shows a diagrammatic sectional elevation of the apparatus.
A web 10 of laminated paper sheets arranged in end-to-end overlapping or underlapping relationship with the continuous polyester lamination film maintaining the otherwise separate paper sheets in position is stored on a drum 12 which is freely rotatably mounted at the inlet of the machine. The web is guided over an anti-curl bar 14 and under a first guide roller 16 prior to moving over a second guide roller 18 arranged at a higher level than the first guide roller 16 whereby the web is deflected over the roller 18. A cutter shaft 20 extends across the web above the second guide roller 18 and its mounting means 22 include vertical adjustment means for raising or lowering the cutter shaft away from or towards the second guide roller. The cutter shaft is braced by two support shafts 21 running parallel to it and carrying support plates 23 in which the cutter shaft is journalled.The cutter shaft is driven by a motor 25 by way of a transmission belt 26 and carries a cutting head 28 which is mounted for rotation with the bar and comprises a plurality of spaced helically disposed cutting blades. It will be realised that by operating the blade height adjustment the cutting blades can be made to remove an area of the laminate film only transverse to the longitudinal axis of the web at those areas of the wen of increased thickness, i.e. at the overlapped or underlapped edges of adjacent sheets. This results in an area of weakness in the lamination film at one edge of the web 10, but not in damage to the sheet and gives an opportunity for a sheet separating arrangement arranged downstream of the cutter bar to separate one laminated sheet from its neighbour.
The separating arrangement includes a first pair of rollers 30 urged towards each other such that they exert a pressure on the web passing therethrough. At least one of the rollers of this first pair is driven by a second drive motor 32 by way of a drive belt 34.
Spaced downstream of the pressure rollers are a pair of separating rollers 36 at least one of which is driven by a motor 38 by way of a drive belt 40. The separating rollers 36 are spaced from the pressure rollers 30 by a distance greater than the length of the sheet to be separated and arranged on the side of the separating rollers 36 nearest to the pressure rollers 30, there is provided a sheet deflecting wheel 42 the axis of rotation of which is angled to the longitudinal axis of the web. The deflection wheel 42 is spaced from the pressure rollers 30 by a distance which is less than the length of a sheet to be separated and secquently it will be realised that when separation takes place the line of intended spearation is located between the deflecting wheel 42 and the pressure rollers 30.The speed of rotation of the separating rollers 36 is greater than that of the pressure rollers 30 so that a tension is applied to the web and this tension, in combination with the distortion at the edge of the sheet caused by the deflecting wheel 42, gives rise to a transverse ripping action through the laminating film which is encouraged by the areas of weakness provided at the edge of the film by the cuts made by the cutting discs 28.As a result, when the film is ripped across the edge of one sheet, the downstream sheet is pulled away from the upstream sheet by the separating rollers and after being returned to its original orientation by correcting rollers 44 downstream of the separating rollers 36, the separated sheet is transported to an adjustable sheet collection tray 46 at the outlet from the machine by an arrangement of continuous conveyor belts 48 the upper run of which extends from the outlet from the pressure rollers 30 the outlet from the machine with an interruption guided by two pairs of S-rollers 50 around the lower separating roller 36.
To accommodate sheets of varying sizes the assembly comprising the separating rollers 36, its drive arrangement 38, 40, the deflecting wheel 42, the correcting rollers 44 and the conveyor belt S-rollers 50 are all mounted for movement as an assembly towards or away from the pressure rollers 30.
The pressure exerted by the pressure rollers 30 and by the separating rollers 36 is adjustable by means of a cam arrangement at one end of the rollers.
Various modifications can be made without departing from the scope of the invention, for example the cutting head 28 may extend across the entire width of the web, in which all the laminated film covering an area of increased thickness, that is an area of dverlap or underlap, is removed so that the cutting head achieves total separation of one sheet from its neighbouring sheet. It will be realised that with this arrangement the rollers in the embodiment described with reference to Fig.
1 for applying tension to the laminate film to cause it to rip may be dispensed with. Similarly, there is no need for a deflecting wheel 42. The arrangement of rollers may be modified in any convenient manner and sheet transportation means other than conveyor belts may be provided.
In a further modification a further cutting head, similar but shorter to cutting head 28, may be positioned at the other egde of the web 10 so that areas of film are removed at both edges of the web.

Claims (12)

1. A sheet separator for laminated sheets of the type defined, comprising feed means for a web of laminated sheets, cutter means for removing only the film lamination over an area extending in a direction substantially transverse to the longitudinal axis of the web at an overlapping of sheets and, downstream of said cutter means, a tensioning arrangement for applying tension to the web whereby the lamination rips along the overiapped edge of a sheet.
2. A separator as claimed in claim 1, in which the cutter means comprises a plurality of helically arranged blades disposed about an axis transverse to the longitudinal axis of the web.
3. A separator as claimed in claim 1 or claim 2, in which the cutter means are mounted for fine adjustment towards and away from a web support roller thereunder.
4. A separator as claimed in any of claims 1 to 3, in which immediately downstream of the cutter means there is provided a pair of pressure rollers defining a nip through which the web is fed and conveyor means are provided for carrying the web and separated sheets downstream of the pressure rollers and at a distance spaced from the pressure rollers by an amount greater than the length of a separate sheet, there is provided a pair of separating rollers defining a nip therebetween, the separating rollers being driven at a speed greater than the pressure rollers whereby they exert tension on the laminating film of the web intermediate the pressure and separating rollers.
5. A separator as claimed in claim 4, in which a sheet deflection wheel is provided upstream of the separating rollers to laterally distort the web and assist in the ripping of the film.
6. A separator as claimed in claim 4 or claim 5, in which the spacing of the deflection wheel from the pressure rollers is slightly less than the length of a sheet to be separated.
7. A separator as claimed in any of the preceding claims, in which an adjustable sheet collection tray is located at the discharge from the conveyor means.
8. A separator as claimed in claim 7, in which the cutting means comprises two spaced cutting drums with helical blades arranged at each side of the web.
9. A sheet separator for laminated sheets of the type defined, comprising feed means for a web of laminated sheets, cutter means for removing only the film lamination over an area extending in a direction substantially transverse to the longitudinal axis of the web at an overlapping of sheets across the entire width of the sheets.
10. A separator as claimed in claim 9, in which the cutting means extends over the entire width of the web whereby all the film lamination joining one sheet to a neighbouring sheet is removed.
11. A sheet separator for laminated sheets, substantially as hereinbefore described with reference to the accompanying drawings.
12. Any novel subject matter or combination including novel subject matter disclosed in the foregoing specification or claims and/or shown in the drawings, whether or not within the scope of or relating to the same invention as any of the preceding claims.
GB8718045A 1986-07-31 1987-07-30 Separating sheets from a web Withdrawn GB2193676A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8618743A GB8618743D0 (en) 1986-07-31 1986-07-31 Coated paper production apparatus

Publications (2)

Publication Number Publication Date
GB8718045D0 GB8718045D0 (en) 1987-09-03
GB2193676A true GB2193676A (en) 1988-02-17

Family

ID=10602033

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8618743A Pending GB8618743D0 (en) 1986-07-31 1986-07-31 Coated paper production apparatus
GB8718045A Withdrawn GB2193676A (en) 1986-07-31 1987-07-30 Separating sheets from a web

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8618743A Pending GB8618743D0 (en) 1986-07-31 1986-07-31 Coated paper production apparatus

Country Status (1)

Country Link
GB (2) GB8618743D0 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328295A2 (en) * 1988-02-06 1989-08-16 Autobond Limited Sheet separating apparatus
EP0472943A2 (en) * 1990-08-30 1992-03-04 Billhöfer Maschinenfabrik GmbH Cutting device for sheet laminator
ES2154518A1 (en) * 1997-05-23 2001-04-01 Invest De Nuevas Aplicaciones Feed and cutting machine for polyester and glass fiber strip with weight control has support for coil of material to be cut, pulling rollers for unwinding strip together with protective plates

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185256A (en) * 1968-04-18 1970-03-25 Giuseppe Rossi Improvements in or relating to Automatic Tearing Devices for Plastics Film
GB1501690A (en) * 1976-07-30 1978-02-22 Celloglas Ltd Cutting a laminated strip
GB2137597A (en) * 1983-04-08 1984-10-10 Cullmoor Limited Process and apparatus for separating laminated sheets from a web
GB2154923A (en) * 1984-03-03 1985-09-18 Autobond Coatings Distribution Severing sheets from a web

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185256A (en) * 1968-04-18 1970-03-25 Giuseppe Rossi Improvements in or relating to Automatic Tearing Devices for Plastics Film
GB1501690A (en) * 1976-07-30 1978-02-22 Celloglas Ltd Cutting a laminated strip
GB2137597A (en) * 1983-04-08 1984-10-10 Cullmoor Limited Process and apparatus for separating laminated sheets from a web
GB2154923A (en) * 1984-03-03 1985-09-18 Autobond Coatings Distribution Severing sheets from a web

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328295A2 (en) * 1988-02-06 1989-08-16 Autobond Limited Sheet separating apparatus
EP0328295A3 (en) * 1988-02-06 1990-10-03 Autobond Limited Sheet separating apparatus
EP0472943A2 (en) * 1990-08-30 1992-03-04 Billhöfer Maschinenfabrik GmbH Cutting device for sheet laminator
DE4027431A1 (en) * 1990-08-30 1992-03-05 Billhofer Maschf Gmbh DISCONNECTING DEVICE FOR ARC LASERING MACHINE
EP0472943A3 (en) * 1990-08-30 1992-09-02 Billhoefer Maschinenfabrik Gmbh Cutting device for sheet laminator
ES2154518A1 (en) * 1997-05-23 2001-04-01 Invest De Nuevas Aplicaciones Feed and cutting machine for polyester and glass fiber strip with weight control has support for coil of material to be cut, pulling rollers for unwinding strip together with protective plates

Also Published As

Publication number Publication date
GB8618743D0 (en) 1986-09-10
GB8718045D0 (en) 1987-09-03

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)