Security device comprising optically variable data and method fo

Details Security device comprising optically variable data and method fo Security device comprising optically variable data and method fo

1991-08-29

1993-12-21

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 57, 283 58, 283902, 283904, 359 2, B42D 1500

Patent

active

052716449

ABSTRACT:
A security-printing device comprising: (i) a substrate; (ii) a toner image adhered to said substrate; and, (iii) a layer of an optically variable material adhered solely to said toner image, whereby said optically variable material is selected to provide a distinct visual appearance and is not readily reproducible or readily available in the general market-place.

REFERENCES:
patent: 4434010 (1984-02-01), Ash
patent: 4510225 (1985-04-01), Kuehnle
patent: 4547002 (1985-10-01), Colgate, Jr.
patent: 4597593 (1986-07-01), Maurer
patent: 4672891 (1987-06-01), Maurer et al.
patent: 5045426 (1991-09-01), Maierson
IBM Technical Disclosure Bulletin, "Secure Document Feature for Copy Machines"; Hobgood, Jr. G. W.; vol. 15 #2 Jul. 1972.

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