METHOD FOR IRIS PRINTING Russian patent published in 2002 - IPC

Abstract RU 2188764 C1

FIELD: printing arts, in particular, polygraphic methods for protection of documents. SUBSTANCE: due to a definite relative position of the printing rollers of the ink feed system a curvilinear color separation boundary is formed, which after a revolution of the impression rollers is reproduced on the form cylinder and further on the sealed up material. EFFECT: enhanced level of protection of documents. 4 dwg

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RU 2 188 764 C1

Authors

Sander E.A.

Chernyshev L.F.

Dates

2002-09-10—Published

2001-02-20—Filed