Identification card and its manufacture
First Claim
Patent Images
1. A method of producing an identification card having an identification signal generation means therein, comprising:
- forming an aperture or concave portion having a larger diameter than the outer diameter of the identification signal generation means in a substantially unoriented non-crystallized polyethylene terephthalate resin sheet having a larger thickness than the thickness of the identification signal generation means; and
heating the non-crystallized resin sheet, having the identification signal generation means in the aperture or concave portion, to crystallize the resin sheet, thus forming a substantially unoriented crystallized polyethylene terephthalate resin sheet;
whereby the aperture or concave portion shrinks, by the heating, to hold the identification signal generation means in the crystallized resin sheet.
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Accused Products
Abstract
An identification card comprises a card body formed from substantially unoriented heated crystallized polyethylene terephthalate resin, and is equipped to generate a recognizable identification signal. A concave portion may be formed on one side of the card body to accommodate, for example, magnetic memory media, to generate the identification signal.
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Citations
24 Claims
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1. A method of producing an identification card having an identification signal generation means therein, comprising:
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forming an aperture or concave portion having a larger diameter than the outer diameter of the identification signal generation means in a substantially unoriented non-crystallized polyethylene terephthalate resin sheet having a larger thickness than the thickness of the identification signal generation means; and heating the non-crystallized resin sheet, having the identification signal generation means in the aperture or concave portion, to crystallize the resin sheet, thus forming a substantially unoriented crystallized polyethylene terephthalate resin sheet; whereby the aperture or concave portion shrinks, by the heating, to hold the identification signal generation means in the crystallized resin sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of producing an identification card, comprising:
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applying magnetic recording media tape on a surface of a substantially unoriented non-crystallized polyethylene terephthalate resin sheet; and heating the non-crystallized resin sheet to crystallize the resin sheet, and applying pressure to the tape, thus forming a substantially unoriented crystallized polyethylene terephthalate resin sheet having the tape embedded therein. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification