Control element for printed matters

Details Control element for printed matters Control element for printed matters

2006-02-14

2006-02-14

Carter, Monica S. (Department: 3722)

Printed matter

Having revealable concealed information, fraud preventer or...

C283S094000, C428S195100, C428S915000, C428S916000

Reexamination Certificate

active

06997482

ABSTRACT:
The control element has a first drawing printed on a first side of the article, comprising at least a first set of geometrical shapes. It includes a second drawing printed on a second side of said article, the second drawing being printed so as to face the first drawing and be in register with the latter, said second drawing comprising at least a second set of geometrical shapes corresponding to the first screen. At least one of said geometrical sets includes sectors which are offset so that, when the front side/reverse side register is correct, the control element has regions of variable density which are visible in transmitted light and are created by said offset sectors.

REFERENCES:
patent: 5443579 (1995-08-01), Tanaka et al.
patent: 5772249 (1998-06-01), Guex et al.
patent: 6050606 (2000-04-01), Foresti
patent: 6089614 (2000-07-01), Howland et al.
patent: 2004/0036272 (2004-02-01), Mathys
patent: 1066109 (1979-11-01), None
patent: 0 509 916 (1992-10-01), None
patent: 0 642 933 (1995-03-01), None
patent: 0 710 574 (1996-05-01), None
International Search Report in SN CH 16612001.

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