Global Patent Index - EP 0979738 B1

EP 0979738 B1 20021113 - Surface treatment method and apparatus for graining aluminium base for printing plates

Title (en)

Surface treatment method and apparatus for graining aluminium base for printing plates

Title (de)

Verfahren und Vorrichtung zur Behandlung eines Aluminiumträgers für Flachdruckplatten

Title (fr)

Appareil et procédé de traitement d'un support en aluminium pour plaques lithographiques


EP 0979738 B1 20021113 (EN)


EP 99306265 A 19990806


JP 22902598 A 19980813

Abstract (en)

[origin: EP0979738A1] A surface treatment method and apparatus for graining a surface of an aluminum plate as a base of a printing plate, wherein graining brushes are pressed onto the aluminum plate and are turned to brush the aluminum plate to rub abrasive slurry on the aluminum plate surface. The amount of electric power required for driving the graining brush to turn at a constant speed to brush the aluminum plate is monitored and maintained constant by changing pressing amount of the graining brush onto the aluminum plate. A classifier continually takes in a part of the abrasive slurry from a slurry supply tank, classifies abrasive particles in the abrasive slurry according to their particle diameters, and feeds back those abrasive particles with larger diameters than a predetermined particle diameter to the slurry supply tank. Those abrasive particles with smaller diameters than the predetermined particle diameter are excluded from the abrasive slurry, so the particle diameters of the abrasive materials in the abrasive slurry are maintained in a predetermined range. <IMAGE>

IPC 1-7

B41N 3/04

IPC 8 full level

B41N 1/08 (2006.01); B24B 29/00 (2006.01); B41N 3/04 (2006.01)

CPC (source: EP)

B41N 3/04 (2013.01)

Designated contracting state (EPC)


DOCDB simple family (publication)

EP 0979738 A1 20000216; EP 0979738 B1 20021113; JP 2000062341 A 20000229

DOCDB simple family (application)

EP 99306265 A 19990806; JP 22902598 A 19980813