Method and system of manufacturing intaglio printing plates for the production of security papers
European Patent Office Patent
Stats
Importance
Abstract
There is described a method of manufacturing intaglio printing plates for the production of security papers, wherein a laser beam (2) is used to engrave intaglio printing patterns (3, 3.1, 3.2, 3.3) directly into the surface of a laser-engravable metallic printing plate medium (1), wherein laser engraving of the metallic printing plate medium (1) is carried out layer by layer in several individual engraving steps performed one after the other in register so that the intaglio printing patterns (3, 3.1, 3.2, 3.3) are gradually engraved into the surface of the metallic printing plate medium (1) up to desired engraving depths, the surface of the engraved metallic printing plate medium (1) being cleaned from residues of the laser engraving process following and between each individual engraving step. The metallic printing plate medium (1) is made of or comprises an outer layer of nickel, steel, brass, zinc, chrome or alloys thereof. Furthermore, an angle of incidence of the laser beam (2) with respect to the surface of the metallic printing plate medium (1) remains constant throughout the engraving process.
First Claim
Family
International Classification(s)
Cited Art Landscape
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address