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US 6,586,078 B2Granted
High pressure lamination of electronic cards
AssigneeSoundcraft, Inc.
InventorJoel R. Smulson
Life of this patent
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Abstract
Plastic cards with included electronic elements are made by laminating a carrier sheet bearing multiple electronic elements between top and bottom plastic sheets. The laminated composite is die cut into separate cards. Prior to lamination the carrier sheet is perforated in a web pattern such that the carrier sheet material is largely recessed from the side edges of the finished cards for better lamination and appearance of the finished card edges. The electronic elements may be obtained on continuous rolls of carrier material which is cut into sheets for lamination.
Claims8
A laminated electronic card, comprising:
- first and second sheets of compatible thermoplastic material, an intermediate carrier sheet of incompatible thermoplastic material and an electronic circuit on said carrier sheet between said first and second sheets, said first and second sheet being bonded to each other along a card edge, said carrier sheet being exposed only along relatively small segments of said card edge thereby to discourage delamination of said first and second sheets along said card edge.
Dependencies are inferred from the claim text.