Claims
- 1. A method of producing opaque all-plastic identification cards having a self supporting body with user-related and user-neutral data, the data being directly accessible on one of the card surfaces, comprising inscribing the user-related card, wherein said self supporting body is made from polyvinyl chloride dyed with titanium dioxide pigment, and controlling the energy of a laser beam in such a way as to produce a local discoloration of the identification card in an area of contact with the laser beam.
- 2. The method of claim 1 wherein said discoloration is brought about by oxidation and/or reduction of a portion of said self supporting body.
- 3. A hand-carried personal identification card comprising:
- a self-supporting opaque all plastic card body made from polyvinyl chloride dyed with titanium dioxide pigment, said card body having an information receiving surface;
- a first set of data being visually detectable and being applied using conventional printing techniques; and
- a second set of data being unique for each card and related to the authorized user of the card whereby said second set of data is burnt into the information receiving surface of said card by means of a laser beam whereby local irreversibly discolored zones, portions, or markings are produced which extend from the information receiving surface of the plastic material deeply into an inner area of the card body beyond the information receiving surface, and whereby the discolored surface portions and the surface portions not exposed to the laser beams form a smooth and flush surface.
- 4. The identification card of claim 3 comprising a single layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3048736 |
Dec 1980 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 696,919, filed Jan. 31, 1985, now abandoned, which is in turn a continuation of application Ser. No. 326,940 filed on Dec. 3, 1981, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (9)
Number |
Date |
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0031521 |
Jul 1981 |
EPX |
0036680 |
Sep 1981 |
EPX |
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Aug 1980 |
DEX |
1360099 |
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FRX |
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FRX |
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GBX |
Continuations (2)
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Number |
Date |
Country |
Parent |
696919 |
Jan 1985 |
|
Parent |
326940 |
Dec 1981 |
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