Document with forgery-prevention means

Details Document with forgery-prevention means Document with forgery-prevention means

1991-06-17

1993-03-02

Eley, Timothy V.

Printed matter

Having revealable concealed information, fraud preventer or...

In incorporated magnetic material

283 58, 283901, 40299, 235379, 235493, B42D 1500

Patent

active

051903180

ABSTRACT:
The document, particularly of the check type, with forgery-prevention means, includes a sheet-like element which has at least one portion for writing indications. In the at least one indication-writing portion, regions made of magnetic material spaced by magnetically blank portions are provided so as to define a code which can be detected by a magnetic reading head. The regions made of magnetic material are impressed with a magnetic material which can be erased by chemical and/or mechanical action.

REFERENCES:
patent: 4186944 (1980-02-01), Pearce
patent: 4925215 (1990-05-01), Klaiber
patent: 4943093 (1990-07-01), Melling et al.
patent: 5016919 (1991-05-01), Rotondo
patent: 5032709 (1991-07-01), Lee et al.

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