Identity card with grid images

Details Identity card with grid images Identity card with grid images

1979-10-07

1981-12-08

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

427 7, 428201, 428203, 428213, 428916, B32B 300

Patent

active

043048099

ABSTRACT:
Disclosed is an identity card having grid images thereon comprised of a linear grid structure. In various embodiments, the grid depths of the individual grid images differ and can produce several different image colors. The card in a further embodiment can comprise a number of layers which are laminated together around a card core which has a window located therein. A number of variations of grid images can be included and/or superposed in the window in order to provide a security identification system which is extremely difficult to forge. Also disclosed are numerous combinations of grid structures some of which include grid images which may be absorption images and/or phase images.

REFERENCES:
patent: 2932913 (1960-04-01), Hannon
patent: 3391479 (1968-07-01), Buzzell et al.
patent: 3457661 (1969-07-01), Peters
patent: 4092234 (1978-05-01), Horst et al.
patent: 4269915 (1981-05-01), Moraw
Von F. Bestenreiner et al., "Optik", vol. 28, 1968/69, pp. 263-287.
M. T. Gale, "Optics Communications", vol. 18, No. 3, Aug. 1976, pp. 293-303.
KiKnop, "Optics Communications" vol. 18, No. 3, pp. 298-302.

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