Apparatus and method for applying heat bondable lamina to a substrate

• US 6,159,327 A
• Filed: 05/08/1998
• Issued: 12/12/2000
• Est. Priority Date: 04/12/1996
• Status: Expired due to Term

• Current Assignee: L-1 Secure Credentialing, LLC (Advent International Corporation)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Forkert, Maurice J.
• Primary Examiner(s): MAYES, MELVIN C
• Application Number:
  US09/075,088
• Time in Patent Office: 949 Days
• Field of Search: 156/256, 156/264, 156/351, 156/353, 156/354, 156/355, 156/362, 156/378, 156/364, 156/517, 156/519, 156/521, 156/555, 156/556, 156/64, 156/308.2, 156/263
• US Class Current: 156/264
• CPC Class Codes: B26D 1/305 for thin material, e.g. for sheets, strips or the like
• CPC Class Codes: B26D 5/08 Means for actuating the cutting member to effect the cut
• CPC Class Codes: B26D 5/16 Cam means
• CPC Class Codes: B26D 5/34 scanning being effected by a photosensitive device
• CPC Class Codes: B32B 2425/00 Cards, e.g. identity cards, credit cards
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: B32B 37/185 Laminating sheets, panels or inserts between two discrete plastic layers
• CPC Class Codes: B32B 38/0004 Cutting, tearing or severing, e.g. bursting; Cutter details cutting in general B26D; laminating combined with punching or perforating B32B38/04; removing all or part of the layers B32B38/10; cutting in combination with laying up and registration B32B38/185 takes precedence
• CPC Class Codes: B32B 38/185 combined with the cutting of one or more layers
• CPC Class Codes: Y10T 156/1062 Prior to assembly
• CPC Class Codes: Y10T 156/1074 Separate cutting of separate sheets or webs
• CPC Class Codes: Y10T 156/1075 of plural laminae from single stock and assembling to each other or to additional lamina
• CPC Class Codes: Y10T 156/1339 Delivering cut part in sequence to serially conveyed articles
• CPC Class Codes: Y10T 156/1741 Progressive continuous bonding press [e.g., roll couples]
• CPC Class Codes: Y10T 156/1744 Means bringing discrete articles into assembled relationship

Abstract

Apparatus and method for making a plurality of substrates laminated on two sides by applying a plurality of laminate sheets to corresponding plurality of substrates. The apparatus includes a lamina supply member capable of holding a supply of lamina from which successive sheets of lamina can be cut. One or more cutters are disposed in the apparatus such that the cutters are capable of cutting through the lamina to provide successive sheets of laminate. One or more heaters are provided for bonding sheets of laminate to corresponding sides of a substrate whereby the corresponding top and bottom laminated substrate is formed. The supply of lamina is characterized by a current leading edge. The supply of lamina is cut through along a cutting line at a predetermined distance from the current leading edge of the lamina. This provides a first sheet of laminate having a trailing edge at the cutting line. Cutting also provides the lamina supply with a successive leading edge at the cutting line. There is substantially no wasted lamina material between the trailing edge of the laminate sheet and the successive leading edge of the lamina. The laminate sheets are then bonded to the top and bottom sides of a corresponding substrate. The steps of cutting the lamina along a cutting line and bonding the resultant laminate sheets to the top and bottom sides of a corresponding substrate are repeated a plurality of times to yield the plurality of laminated substrates.

Claims

1. An apparatus for automatically laminating two sides of a generally planar substrate, said apparatus comprising:

a lamina supply route,

a lamina supply member, said member capable of holding a webless supply of lamina material which can be cut into successive sheets of laminate;

a lamina conveyor disposed along said lamina supply route for transporting said laminate sheets;

a substrate path having an entry and an exit, a substrate conveyor being disposed along said substrate path, said substrate conveyor capable of transporting the substrate from said entry to said exit;

a convergence zone, said lamina supply route connecting to said substrate path in said convergence zone, a first side of the substrate being brought into registration with a first sheet of laminate in said convergence zone, a second side of the substrate being brought into registration with a second sheet of laminate in said convergence zone;

said substrate path including a bonding station, the first cut sheet of laminate being bonded to the first side of the substrate and the second cut sheet of laminate being bonded to the second side of the substrate in said bonding station, said substrate path including said convergence zone following said entry, said bonding station following said convergence zone and said exit following

said bonding station, whereby the first and second sides of the substrate can both be laminated during a single pass of the substrate along the substrate path; and

a lamina sensor disposed along said lamina supply route and in communication with said lamina conveyor, said lamina sensor capable of detecting a predetermined reference of the lamina and signaling said lamina conveyor in response to said detection.

2. The apparatus of claim 1, wherein said supply member comprises a plurality of supply members, said supply members each capable of holding a webless supply of lamina, each of the webless supplies possessing unique characteristic.

3. The apparatus of claim 1, wherein said lamina supply route comprises a first lamina supply path and a second lamina supply path.

4. The apparatus of claim 3, wherein said convergence zone further comprises:

first and second convergence zones, said first lamina supply path connecting to said substrate path in said first convergence zone, one of the first and second sides of the substrate being brought into registration with the first sheet of laminate in said first convergence zone; and

said second lamina supply path connecting to said substrate path in said second convergence zone, the other one of the first and second sides of the substrate being brought into registration with the second sheet of laminate in said second convergence zone.

5. The apparatus of claim 3, wherein a cutter is disposed along said supply route for cutting lamina into successive sheets of laminate, said cutter comprising a first cutter disposed along said first lamina supply path and a second cutter disposed along said second lamina supply path.

6. The apparatus of claim 5, wherein said cutter is a motor driven rotary cutter.

7. The apparatus of claim 6, wherein said rotary cutter comprises:

a fixed cutting blade and a rotating cutting blade, said rotating cutting blade being rotatable from an open position through a cutting position and rotatably returning to said open position; and

wherein

at said open position, said lamina supply route extends between said fixed cutting blade and said rotating cutting blade; and

at said cutting position, said rotating cutting blade cuttingly engages said fixed cutting blade.

8. The apparatus of claim 7, wherein said cutter further comprises a switch, said switch disengaging said cutter after one revolution of said cutting blade.

9. The apparatus of claim 1, wherein a cutter is disposed along said supply route for cutting lamina into successive sheets of laminate.

10. The apparatus of claim 1, further comprising a substrate sensor disposed along said substrate path, said substrate sensor in communication with said lamina conveyor, said substrate sensor capable of detecting a predetermined reference of the substrate and signaling said lamina conveyor.

11. The apparatus of claim 10, further comprising a controller, said controller communicating signals between said lamina sensor, said substrate sensor, said conveyors and said cutter.

12. The apparatus of claim 10, wherein said substrate sensor and said lamina sensor are positioned relative to one another such that, when said substrate sensor signals said lamina conveyor, a leading edge of the substrate and a leading edge of the laminate sheet are capable of being aligned, the laminate sheet being maintained in said alignment for further transportation along said substrate path.

13. The apparatus of claim 1, wherein said lamina supply route includes a turning point, whereby a direction of travel of a conveyed sheet of laminate can be reversed.

14. The apparatus of claim 1, wherein said lamina supply route crosses said substrate path.

15. The apparatus of claim 1, wherein said lamina conveyor is comprised of at least one pair of conveyor rollers said pair further comprising:

a first roller disposed above said lamina supply route, a circumferential limit of said first roller substantially coinciding with a plane tangent to said supply route;

a second roller disposed below said lamina supply route, a circumferential limit of said second roller substantially coinciding with said plane;

said first and second rollers rotatably driven, said rollers capable of engaging and conveying one of a lamina and a laminate sheet.

16. The apparatus of claim 15, wherein a first pair of rollers, said cutter, and a second pair of rollers are disposed sequentially along said lamina supply route.

17. The apparatus of claim 16, wherein said first pair rotates at a slower speed than said second pair, whereby slack in a supply of lamina is capable of being reduced.

18. The apparatus of claim 1, wherein said substrate path maintains the top side of the substrate continually facing substantially upward from said entry to said exit.

19. The apparatus of claim 1, wherein said substrate path includes a card flipper, said flipper capable of reversing the orientation of the top and bottom sides of the substrate.

20. The apparatus of claim 1, wherein said bonding station is comprised of a pair of rollers, said pair further comprising:

a first roller disposed adjacent a first side of said substrate supply path, a circumferential limit of said first roller substantially coinciding with a plane tangent to said substrate supply path;

a second roller disposed adjacent a second side of said substrate supply path, a circumferential limit of said second roller substantially coinciding with said plane;

one of said first and second rollers having a heating element;

said rollers being rotatably driven, said rollers capable of bonding a laminate sheet to one of the top and bottom sides of the substrate and advancing the laminated substrate along said substrate path.

21. The apparatus of claim 20, wherein said bonding station further comprises first and second pairs of rollers, one of said pairs bonding the first cut sheet of laminate to the first side of the substrate and the other of said pairs bonding the second cut sheet of laminate to the second side of the substrate.

22. The apparatus of claim 21, wherein said heating element of said first pair of rollers operates at one of a higher temperature and lower temperature than does said heating element of said second pair.

23. The apparatus of claim 1, wherein said bonding station is comprised of a pair of rollers, said pair further comprising:

a first roller disposed adjacent a first side of said substrate supply path, a circumferential limit of said first roller substantially coinciding with a plane tangent to said supply path;

a second roller disposed adjacent a second side of said substrate supply route, a circumferential limit of said second roller substantially coinciding with said plane;

said first and second rollers having a heating element;

said rollers being rotatably driven, said rollers capable of bonding the first and second laminate sheets to the first and second sides of the substrate respectively and advancing the laminated substrate along said substrate path.

24. The apparatus of claim 1, wherein said substrate conveyor includes at least one pair of rollers, said pair further comprising:

a first roller disposed adjacent a first side of said substrate supply path, a circumferential limit of said first roller substantially coinciding with a plane tangent to said supply path;

a second roller disposed adjacent a second side of said substrate supply path, a circumferential limit of said second roller substantially coinciding with said plane;

said rollers being rotatably driven, said rollers capable of advancing the substrate and laminated substrate along said substrate path.

25. The substrate conveyor of claim 24, further comprising a conveyor belt, said conveyor belt disposed along said substrate path.

26. An apparatus for automatically laminating two sides of a generally planar substrate, said apparatus comprising:

a lamina supply route,

a lamina supply member, said member capable of holding a webless supply of lamina material which can be cut into successive sheets of laminate;

a lamina conveyor disposed along said lamina supply route for transporting said laminate sheets independently of said planar substrate;

a substrate path having an entry and an exit, a substrate conveyor being disposed along said substrate path, said substrate conveyor capable of transporting the substrate from said entry to said exit;

a convergence zone, said lamina supply route connecting to said substrate path in said convergence zone, a first side of the substrate being brought into registration with a first sheet of laminate in said convergence zone, a second side of the substrate being brought into registration with a second sheet of laminate in said convergence zone;

said substrate path including a bonding station, the first cut sheet of laminate being bonded to the first side of the substrate and the second cut sheet of laminate being bonded to the second side of the substrate in said bonding station, said substrate path including said convergence zone following said entry, said bonding station following said convergence zone and said exit following

said bonding station, whereby the first and second sides of the substrate can both be laminated during a single pass of the substrate along the substrate path.

27. A process of making a plurality of laminated cards, the cards laminated on first and second sides, said process comprising the steps of:

(a) providing a webless supply of lamina from which a successive plurality of laminated sheets is cut, said lamina having a current leading edge;

(b) cutting through the lamina along a cutting line at a predetermined distance from a reference of the lamina to provide a first sheet of laminate wherein said cutting provides the laminate sheet with the trailing edge of the cutting line and wherein said cutting provides the lamina supply with the successive leading edge at the cutting line, and wherein there is no wasted lamina between the trailing edge of the laminate sheet and the successive leading edge of the lamina;

(c) repeating step (b) to produce a second sheet of cut laminate;

(d) bonding the first laminate sheet to a first side of a first card and bonding the second laminate sheet to a second side of the first card; and

(e) following steps (b) through (d) a plurality of times to yield said plurality of cards laminated on first and second sides.

28. A process of making a plurality of laminated cards, the cards laminated on first and second sides, said process comprising the steps of:

(a) providing a webless supply of lamina from which a successive plurality of laminate sheets is cut, said lamina having a current leading edge;

(b) cutting through the lamina along a cutting line at a predetermined distance from a reference of the lamina to provide a first sheet of laminate, wherein said cutting provides the laminate sheet with a trailing edge at the cutting line and wherein said cutting provides the lamina supply with a successive leading edge at the cutting line, and wherein there is no wasted lamina between the trailing edge of the laminate sheet and the successive leading edge of the lamina;

(c) bonding the first laminate sheet to a first side of a first card;

(d) repeating step (b) to provide a second sheet of laminate;

(e) bonding the second laminate sheet to a second side of the first card; and

(f) following steps (b) through (e) a plurality of times to yield said plurality of laminated cards.

29. The process of claim 28 wherein the step of cutting through a lamina comprises cutting the lamina with a motor driven rotary cutter.

30. The process of claim 29 wherein said rotary cutter comprises:

a fixed cutting blade and a rotating cutting blade, said rotating cutting blade being rotatable from an open position through a cutting position and rotatably returning to said open position; and

wherein

at said open position, said lamina supply route extends between said fixed cutting blade and said rotating cutting blade; and

at said cutting position, said rotating cutting blade cuttingly engages said fixed cutting blade.

31. The process of claim 30, wherein said cutter further comprises a switch, said switch disengaging said cutter after one revolution of said rotating cutting blade.

32. The process of claim 28 wherein the bonding step comprises bonding the entire cut sheet of laminate to the card such that no portion of the cut sheet comprises waste material which is not bonded to the card.

33. The process of claim 28 wherein the bonding steps comprise:

registrably bringing the laminate sheet and the card together; and

heating the laminate sheet to bond the sheet to the card.

34. A method of making a laminated substrate, comprising the steps of:

(a) providing first and second webless supplies of lamina from which successive sheets of laminate are cut;

(b) conveying the lamina from the first supply along a lamina supply route until a sensor detects a reference on the lamina;

(c) stopping the conveyance of the lamina along the supply route in response to detecting the reference on the lamina;

(d) after the stopping of the lamina, cutting through the lamina along a cutting line at a predetermined distance from the reference of the lamina in order to provide a first cut laminate sheet;

(e) repeating steps (b)-(d) for the second supply of lamina to provide a second cut laminate sheet;

(f) providing a substrate having a leading edge;

(g) bringing the first and second laminate sheets and the substrate together into registrable contact; and

(h) bonding the first laminate sheets to one of a top and a bottom side of the substrate, and bonding the second laminate sheet to the other one of the top and the bottom side of the substrate.

35. The method of claim 34, wherein the bonding step comprises bonding the entire cut sheets of laminate to the substrate such that no portion of the cut sheets comprise waste material which is not bonded to the substrate.

36. The method of claim 34, wherein the bonding step comprises registrably bringing the laminate sheet and substrate together and heating the laminate sheet to bond the sheet to the substrate.

37. A process of making a plurality of laminated cards, comprising the steps of:

(a) providing first and second webless supplies of lamina from which successive plurality of first and second laminate sheets are separated, wherein said lamina has a current leading edge;

(b) providing a lamina supply route along which the first and second laminate sheets are conveyed;

(c) providing a card path;

(d) conveying a card along the substrate path to a convergence zone;

(e) conveying the first laminate sheet from the lamina supply route to the convergence zone and bringing the first sheet into registration with a first side of the card;

(f) conveying the second laminate sheet from the lamina supply route to the convergence zone and bringing the second sheet into registration with a second side of the card;

(g) further conveying a card along the card path through a bonding station, the bonding station positioned along the card path, the bonding station laminating the first and second laminate sheets to the card; and

(h) following steps (d) through (g) a plurality of times to yield said plurality of cards.