Direct negative and offset master production using thermal lifto

Details Direct negative and offset master production using thermal lifto Direct negative and offset master production using thermal lifto

1987-12-10

1989-06-06

Crowder, Clifford D.

Printing

Planographic

Lithographic printing plates

1014631, 1014011, 400120, 4002411, 346 76PH, 428195, 428484, 428212, 4284881, 4284884, 428913, 428914, B41N 108, B41C 110

Patent

active

048361054

ABSTRACT:
An improved printing member for use in a system wherein a current source, in combination with a resistive ribbon, produces heating in selected areas of the ribbon for effecting the formation of a printing pattern on the printing member, which member is composed of a first layer, having a predetermined melting temperature, and a heat-conducting layer which adheres to the first layer below its predetermined melting temperature and which adheres to said resistive ribbon at temperatures above said predetermined melting temperature, such that, when the second layer is heated to a temperature level above the predetermined melting temperature in selected areas forming a pattern to be printed, the selected areas will adhere to the resistive ribbon and release from the first layer. Consequently, when the resistive ribbon is in contact with the heat-conductive layer while at a temperature level above the predetermined melting temperature of the first layer and is then drawn away from the heat-conductive layer, the selected areas will be removed from the heat-conductive layer forming the pattern to be printed therein.

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patent: 3342623 (1967-09-01), Dulmage
patent: 3483027 (1969-12-01), Ritzerfeld
patent: 3559576 (1971-02-01), Vrancken
patent: 4123309 (1978-10-01), Perrington et al.
patent: 4157412 (1979-06-01), Deneau
patent: 4374691 (1983-02-01), Vanden Bergh
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patent: 4453839 (1984-06-01), Findlay
patent: 4525722 (1985-06-01), Sachdev
patent: 4651162 (1987-03-01), Nakamura
patent: 4672393 (1987-06-01), Uchikata
patent: 4707211 (1987-11-01), Shibata
patent: 4724445 (1988-02-01), Amano
IBM; IBM Tech. Disc.; vol. 30, No. 3, Aug. 1987; p. 1109.

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