Security document containing a non-orthogonal array

Details Security document containing a non-orthogonal array Security document containing a non-orthogonal array

1996-11-19

1999-09-21

Fridie, Jr., Willmon

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

B42B 1500

Patent

active

059543680

ABSTRACT:
A security document is provided comprising a substrate having a top surface for carrying printed indicia. Background printed matter is printed on the top surface. The background printed matter is made up of a pattern of background elements. A security term is also printed on the top surface of the substrate. The security term is composed of a pattern of security term elements. The background elements or the security term elements, or both, are organized in a non-orthogonal, repetitive pattern. Also, either the background elements or the security term elements are not readily duplicated by a color copier while the other elements are readily duplicated by a color copier. This results in a visually perceptible security term being produced upon a copy of the security document. The security document is "imaging friendly."

REFERENCES:
patent: 4210346 (1980-07-01), Mowry, Jr. et al.
patent: 4351547 (1982-09-01), Brooks, II
patent: 4579370 (1986-04-01), Corwin et al.
patent: 5149140 (1992-09-01), Mowry, Jr. et al.
patent: 5171040 (1992-12-01), Orndorff
patent: 5378886 (1994-12-01), Tsuchiya
patent: 5479507 (1995-12-01), Anderson
patent: 5487567 (1996-01-01), Volpe

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