Method for applying heat bondable lamina to a substrate

• US 6,007,660 A
• Filed: 12/18/1997
• Issued: 12/28/1999
• 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:
  US08/993,270
• Time in Patent Office: 740 Days
• Field of Search: 156/64, 156/256, 156/264, 156/353, 156/354, 156/521, 156/355, 156/DIG. 33, 156/DIG. 36, 156/DIG. 45, 156/DIG. 46, 156/308.2
• US Class Current: 156/256
• 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. A process of making a plurality of laminated cards, comprising the steps of:

(a) providing a webless supply of heat bondable, transparent lamina from which a successive plurality of laminate sheets is cut, wherein said lamina has a current leading edge;

(b) cutting through the line 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) bringing the laminate sheet and a first card together into registrable contact to substantially completely cover one face of the card;

(d) heat bonding the laminate sheet to the first card; and

(e) following steps (b), (c) and (d) a plurality of times to yield said plurality of laminated cards.

2. The method of claim 1 wherein the step of cutting through a lamina comprises cutting the lamina with a motor driven pair of scissors.

3. The method of claim 2 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;

at the open position, the lamina supply is capable of being conveyed 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.

4. The method of claim 3 wherein the pivoting cutting blade is disposed upstream relative to the fixed cutting blade.

5. The method of claim 3 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 pivoting cutting blade, such that rotation of the blade cam causes the pivoting blade to pivotably open and close about the blade pivot.

6. The method of claim 1 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.

7. A process of making a laminated substrate, comprising te steps of:

(a) providing a webless supply of heat bondable, transparent from which successive sheets of laminate are cut, wherein the lamina supply has a leading edge;

(b) conveying the lamina along a lamina supply path until a sensor detects a reference on the lamina;

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

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

(e) providing a substrate having a leading edge;

(f) bringing the laminate sheet and the substrate together into registrable contact to substantially completely cover one face of the substrate; and

(g) heat bonding the laminate sheet to the substrate.

8. The method of claim 7, wherein the step of cutting through the lamina comprises cutting the lamina with a motor driven pair of scissors.

9. The method of claim 8 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;

at the open position, the lamina supply is capable of being conveyed 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.

10. The method of claim 9, wherein the pivoting cutting blade is disposed upstream relative to the fixed cutting blade.

11. The method of claim 9, wherein, the cutter further comprises a rotatable blade cam shaft and a rotatable blade cam eccentrically mounted on the blade cam shaft, and wherein the blade cam is coupled to the pivoting cutting blade such that rotation of the blade cam causes the pivoting blade to pivotably open and close about the blade pivot.

12. The method of claim 7, wherein the bonding step comprises bonding the entire cut sheet of laminate to the substrate such that no portion of the cut sheet comprises waste material which is not bonded to the substrate.