Patent · US Expired

Gravure process for printing adjacent color surfaces with various color coating thicknesses

US6928925B1 · kind B1 · utility

12Cited by

6References

9Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Karlheinz Mayer · Grünenbach, DE
Roger Adamczyk · Munich, DE
Eduard Wisjak · Vaterstetten, DE
Peter Franz · Mumpf, CH

Key dates

Filing date	Sep 29, 1999
Grant date	Aug 16, 2005
Priority date	—
Expiry date	Sep 29, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41N1/06
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention concerns a data medium with a printed image created by the intaglio printing process. The printed image has at least one first ink area with a first ink layer thickness and at least one second ink area with a second ink layer thickness adjacent to the first ink area, such that the ink layer thicknesses are different. The first and second ink areas are separated by a sharp border line invisible on examination with the naked eye, and the ink layer thickness of both ink areas passes through a minimum in the region of the border line.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.