Back to results
US 4,078,927 AGranted
Photoconductive printing master
AssigneeXerox Corporation
InventorsAlan B. Amidon, Joseph Mammino
Life of this patent
Estimating the term…
Abstract
A planographic printing master comprising an ink releasing photoconductive insulating layer and an ink receptive particulate image pattern.
Claims3
A photoconductive planographic printing master comprising:
- (a) a conductive substrate;
- (b) a photoconductive ink releasing layer operatively disposed in relation to said substrate, said layer comprising 2,4,7-trinitro-9-fluorenone and a block copolymer of soft poly(dimethylsiloxane) segments and hard poly(.alpha.-methylstyrene) segments, the relative weight ratio of hard polymer segments to soft polymer segments in said copolymer being in the range of from about 75:25 to about 5:95;
- and
- (c) an ink receptive image pattern affixed to the surface of said photoconductive layer, said pattern comprising a thermoplastic polymeric material including styrene and/or substituted styrene segments.
1 more element
The photoconductive planographic printing master of claim, 1 wherein the relative weight ratio of hard polymer segments to soft polymer segments is in the range of from about 25:75 to about 5:95.
Dependencies are inferred from the claim text.