Apparatus for applying heat bondable lamina to a substrate

• US 5,783,024 A
• Filed: 04/12/1996
• Issued: 07/21/1998
• Est. Priority Date: 04/12/1996
• Status: Expired due to Term

• Current Assignee: L-1 Secure Credentialing, LLC (Advent International Corporation)
• Original Assignee: Nbs Imaging Systems, Inc.
• Inventors: Forkert, Maurice J.
• Primary Examiner(s): Mayes, Curtis
• Application Number:
  US08/630,681
• Time in Patent Office: 830 Days
• Field of Search: 156/256, 156/264, 156/353, 156/354, 156/355, 156/362, 156/378, 156/364, 156/517, 156/521, 156/519, 156/555, 156/556, 156/DIG. 1, 156/908, 156/DIG. 2 , 156/DIG. 33, 156/DIG. 36, 156/DIG. 45, 156/DIG. 46, 156/DIG. 51, 156/351
• US Class Current: 156/351
• 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 37/0015 to avoid warp or curl
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• 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 156/1339 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 suitable for making a plurality of laminated substrates 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. A cutter is disposed in the apparatus such that the cutter is capable of cutting through the lamina to provide said successive sheets of laminate. A heater is provided for bonding each successive sheet of laminate to a corresponding substrate whereby the corresponding 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 sheet is then bonded to a corresponding substrate. The steps of cutting the lamina along a cutting line and bonding the resultant lamina sheet to a corresponding substrate are repeated a plurality of times to yield the plurality of laminated substrates.

Claims

1. An apparatus for making a plurality of laminated substrates by cutting a plurality of protective, transparent laminate sheets from a webless supply of lamina and applying said sheets to a corresponding plurality of planar substrates, each said substrate having information on one face thereof, each said laminate sheet applied over a said one face and substantially completely covering said one face, said apparatus comprising:

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

a cutter, said cutter capable of cutting said lamina into successive sheets of laminate;

a convergence zone at which successive sheets of laminate and corresponding planar substrates are registrably brought into contact such that each said laminate sheet substantially completely covers a said one face of said substrate;

a lamina supply path extending from said lamina supply member to said convergence zone, said cutter disposed on said lamina supply path;

a lamina sensor disposed on the lamina supply path between the cutter and the convergence zone, said lamina sensor capable of detecting a predetermined reference of the lamina;

a laminate transport means for conveying a laminate sheet along the lamina supply path in a direction from the cutter towards the convergence zone;

a substrate entry zone at which the substrates enter the apparatus;

a substrate supply path extending from the substrate entry zone to the convergence zone;

a substrate sensor disposed on the substrate supply path, said substrate sensor capable of detecting a predetermined reference of the substrate;

a control responsive to the lamina sensor for actuating the cutter to sever a sheet of laminate from the lamina supply when said lamina sensor detects the lamina reference, for actuating said laminate transport means, and for retaining said laminate sheet on said lamina supply path, said control further responsive to said substrate sensor to activate said laminate transport means to cause said laminate sheet and substrate to be registrably brought together at the convergence zone whereby said laminate sheet substantially completely covers said one face of said substrate; and

a heater for bonding each successive sheet of laminate to a corresponding substrate to form a laminated substrate.

2. The apparatus of claim 1, wherein the apparatus further comprises lamina transport means for conveying the lamina along the lamina supply path in a direction from the supply of lamina towards the convergence zone.

3. The apparatus of claim 1, wherein the cutter is a motor-driven pair of scissors.

4. The apparatus of claim 3, wherein the scissors comprises:

a fixed cutting blade and a pivoting cutting blade being pivotable about a blade pivot from an open position to a closed position; and

wherein

at the open position, the lamina supply path extends between the fixed cutting blade and the pivoting cutting blade; and

at the closed position, said pivoting cutting blade cuttingly engages the fixed cutting blade.

5. The apparatus of claim 4, wherein the pivoting cutting blade is disposed on the lamina supply path upstream relative to the fixed cutting blade.

6. The apparatus of claim 4, wherein the cutter further comprises a rotatable blade cam shaft and a rotatable blade cam eccentrically mounted on the blade cam shaft, wherein the blade cam is coupled to the cutter such that rotation of the blade cam causes the pivoting cutting blade to pivotably open and close about the blade pivot.

7. The apparatus of claim 1, wherein the apparatus further comprises substrate transport means for conveying the substrates along the substrate supply path in a direction from the substrate entry zone towards the convergence zone.

8. The apparatus of claim 1, further comprising means for generating a signal indicating that the cutter has cut the piece of laminate off from the supply of lamina.

9. The apparatus of claim 1, further comprising:

an exit zone at which the laminated substrates exit the apparatus;

a processing path extending from the convergence zone to the exit zone, wherein the heater is disposed on said processing path.

10. The apparatus of claim 9, wherein the heater comprises a heated roller assembly and a corresponding pinch roller disposed on the processing path such that the processing path passes between the heated roller and the corresponding pinch roller as the laminate sheets and the substrates are conveyed along said processing path;

and wherein the heated roller assembly comprises;

a nonrotatable heater core; and

a rotatable roller shell housing the nonrotatable heater core such that the roller shell is heated by the core for heatably bonding the laminate sheets to the substrates.

11. The apparatus of claim 9, further comprising a card straightener for applying a reverse bend to the laminated substrates.

12. The apparatus of claim 11, wherein the card straightener is disposed on the processing path between the heater and the exit zone, wherein said card straightener is an assembly comprising:

a first pinch roller having a center of rotation;

a second pinch roller having a center of rotation;

wherein the first and second rollers are disposed on the processing path such that the processing path passes between said rollers;

wherein a line extending from the center of rotation of the first pinch roller to the center of rotation of the second pinch roller defines an axis of the assembly; and

wherein said axis is pivotable.