EP 0030642 A3 19820526 - LITHOGRAPHIC PRINTING PLATE AND METHOD FOR PRODUCING THE SAME
Title (en)
LITHOGRAPHIC PRINTING PLATE AND METHOD FOR PRODUCING THE SAME
Publication
Application
Priority
US 10396579 A 19791217
Abstract (en)
[origin: EP0030642A2] An improved lithographic printing plate includes a substrate layer (21 of a nonconducting, hydrophobic material, an intermediate film (3) of conducting, hydrophilic material such as aluminum and a top protective film (5) of relatively hard hydrophilic dielectric material, such as aluminum oxide. A printing image is formed in the lithographic printing plate by an electroerosion process wherein erosion electrodes (7) are pulsed with voltage to break down the dielectric film (5) in areas adjacent to the erosion electrodes (7) and to evaporate or otherwise remove corresponding portions of the conducting film (3), thereby creating holes (8) that extend through the dielectric (5) and conducting (3) films and that expose portions of the surface of the underlying hydrophobic substrate (2).
IPC 1-7
IPC 8 full level
B41C 1/10 (2006.01); B41N 1/10 (2006.01); B41C 1/00 (2006.01); B41N 1/14 (2006.01); B41N 3/03 (2006.01)
CPC (source: EP)
B41C 1/1033 (2013.01); B41N 3/03 (2013.01)
Citation (search report)
- [A] FR 2254440 A1 19750711 - VICKERS LTD [GB]
- [A] DE 849609 C 19520915 - BOSCH GMBH ROBERT
- [A] DE 2111274 A1 19721012 - BOSCH GMBH ROBERT
- [A] FR 2163199 A5 19730720 - BOSCH
- [A] US 4082902 A 19780404 - SUZUKI AKIRA, et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0030642 A2 19810624; EP 0030642 A3 19820526; CA 1144418 A 19830412; IT 1149864 B 19861210; IT 8026395 A0 19801203; JP S5693590 A 19810729; JP S6151558 B2 19861110
DOCDB simple family (application)
EP 80107228 A 19801120; CA 362742 A 19801020; IT 2639580 A 19801203; JP 17106880 A 19801205