Identification card and method of producing it

Details Identification card and method of producing it Identification card and method of producing it

1985-10-11

1986-06-24

Spruill, Robert L.

Printed matter

Having revealable concealed information, fraud preventer or...

Identifier

283 67, 283 77, 283 85, 283 93, 283904, 346 76L, 430945, 430947, B42D 1500

Patent

active

045964092

ABSTRACT:
An identification card, in particular an all-plastic indentification card, written on by means of a laser, having user-related and user-neutral data such as a name, account number, etc. present on the surface of the indentification card in the form of local discolorations of the identification card material without any transition. Due to a local increase in tensile strength, these decolorized areas have greater resistance to mechanical changes and/or chemical solvents than the surrounding areas of the identification card made of the same identification card material. Thus attempted falsification by means of mechanical and chemical means is prevented in an especially effective way, since such attempts lead to destruction of the identification card in each case. The personalization of the identification card with the freely selectable user-related data can take place by preference decentrally by means of a laser beam, the energy of which is controlled in such a way that the identification card material is decolorized but not destroyed.

REFERENCES:
patent: 3715734 (1973-02-01), Fajans
patent: 3899333 (1975-08-01), Berman et al.
patent: 3902180 (1975-08-01), Sobajima et al.
patent: 4032691 (1977-06-01), Kido et al.

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