Security card and security card blank

Details Security card and security card blank Security card and security card blank

1986-08-13

1988-05-31

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283904, B42D 1500

Patent

active

047476206

ABSTRACT:
A security card blank comprises a plurality of superposed layers (5,5',6,7,8,9) including a metallic layer (5,5'). The metallic layer comprises any radiation absorbent, metal, metalloid, or their alloys or derivatives, such as oxides or sulphides. The metallic layer (5,5') is positioned within the card blank and is imageable only under the influence of high intensity radiation to produce a security card. After imaging, at least part of the imaged metallic layer is detectable from outside the card.

REFERENCES:
patent: 3506779 (1970-04-01), Brown et al.
patent: 3560994 (1971-02-01), Wolff et al.
patent: 3640009 (1972-02-01), Komiyama
patent: 3647275 (1972-03-01), Ward
patent: 3947661 (1976-03-01), Silverman et al.
patent: 4000492 (1976-12-01), Willens
patent: 4119361 (1978-10-01), Greenaway
patent: 4309713 (1982-01-01), Shinozaki
patent: 4352706 (1982-10-01), Miller
patent: 4501439 (1985-02-01), Antes
patent: 4547002 (1985-10-01), Colgate, Jr.
patent: 4587535 (1986-05-01), Nakane et al.

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