Global patent index - EP 0704770 B1

EP 0704770 B1 2000-02-09 - Process for supporting the production of images on a printing plate and printing plate used in such process

Title (en)

Process for supporting the production of images on a printing plate and printing plate used in such process

Title (de)

Verfahren zum Unterstützen der Bebilderung einer Druckform und Druckform zur Verwendung in einem der Verfahren

Title (fr)

Procédé de support de fabrication d'images sur une plaque d'impression et plaque d'impression utilisée dans tel procédé

Publication

EP 0704770 B1 (DE)

Application

EP 95114848 A

Priority

DE 4434766 A

Abstract (en)

[origin: EP0704770A2] The printing plate has at least a first layer (1) of a ferroelectric material which acts as a photoconductor when illuminated by a light beam of given frequency before and/or during the polarisation, due to the photoferroelectric effect. Pref. the ferroelectric layer is illuminated with an electromagnetic beam with a frequency below the material specific boundary frequency, so that the temp. in the ferroelectric layer is raised, with transparent electrodes (2, 3) on opposite sides of the layer for simultaneous application of an electrical field with a field strength below the coercivity field strength of the layer in its non-illuminated condition.

IPC 1-7 (main, further and additional classification)

G03G 13/056; G03G 15/056

IPC 8 full level (invention and additional information)

G03G 15/05 (2006.01); B41C 1/00 (2006.01); B41C 1/10 (2006.01); G03G 5/02 (2006.01); G03G 5/022 (2006.01); G03G 13/056 (2006.01); G03G 13/26 (2006.01)

CPC (invention and additional information)

B41C 1/1058 (2013.01); G03G 5/02 (2013.01); G03G 5/022 (2013.01); G03G 13/056 (2013.01); G03G 13/26 (2013.01)

Designated contracting state (EPC)

CH DE FR GB IT LI NL

EPO simple patent family

EP 0704770 A2 19960403; EP 0704770 A3 19970507; EP 0704770 B1 20000209; CA 2157810 A1 19960330; CA 2157810 C 20000905; DE 4434766 A1 19960404; JP 2914899 B2 19990705; JP H08123164 A 19960517; US 5900341 A 19990504

INPADOC legal status

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