Lithographic plates made by spark discharges

Details Lithographic plates made by spark discharges Lithographic plates made by spark discharges

1988-08-19

1990-03-27

Crowder, Clifford D.

Printing

Planographic

Lithographic printing plates

346162, 3461351, 428161, 428908, B41N 114

Patent

active

049110756

ABSTRACT:
A lithographic plate for printing without dampening comprising a strong stable substrate, an oleophobic surface layer on the substrate and an oleophilic surface underlying the surface layer, the surface layer being decomposable by spark discharges originating from a non-contacting electrode scanned across the plate surface. A preferred plate embodiment includes a multiplicity of tiny electrically conductive peaks in the plate which point away from the substrate and are in a relatively uniform distribution across the plate surface area.

REFERENCES:
patent: 3861952 (1975-01-01), Tokumoto et al.
patent: 4082902 (1978-04-01), Suzuki et al.
patent: 4098188 (1978-07-01), Stroszynski
patent: 4596733 (1986-06-01), Cohen et al.
patent: 4718340 (1988-01-01), Love, III

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