Method for making an identification card having features for tes

Details Method for making an identification card having features for tes Method for making an identification card having features for tes

1985-12-18

1987-12-08

Czaja, Donald E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156277, 264 17, 264132, 283 91, 283110, 283904, 428916, B32B 500, B32B 2700

Patent

active

047116900

ABSTRACT:
The multilayer identification card comprises several synthetic layers compounded by the effects of heat and pressure. An inside interface of at least one of these layers exhibits depressions which are filled with the material of the adjacent layer during the laminating process. The adjacent layers are selected in such a way that they are of different transparency. Thus a light and shadow effect is produced in incident light which is reversed in transmitted light.

REFERENCES:
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patent: 3967400 (1976-07-01), Otto
patent: 4100011 (1978-07-01), Foote
patent: 4307899 (1981-12-01), Hoppe
patent: 4313984 (1982-02-01), Moraw et al.
patent: 4469725 (1984-09-01), Fischer et al.
patent: 4506916 (1985-03-01), Kuhl

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