Method of making an overlay mask and a printing plate therefrom

Details Method of making an overlay mask and a printing plate therefrom Method of making an overlay mask and a printing plate therefrom

1979-04-11

1980-11-04

Wintercorn, Richard A.

Photocopying

Contact printing

Methods

354 4, 355 54, G03B 4100

Patent

active

042316596

ABSTRACT:
A method of making overlay masks for photoetching of printing plates with printing matter utilizes a photoplotter having an optical exposure head to precisely expose a photosensitive film in a predetermined mask pattern. The pattern may include symbols, "knock out" windows for cropping pictures in both grey and color halftones, and line work such as framing for pictures and other printing matter.

REFERENCES:
patent: 3330182 (1967-07-01), Gerber et al.
patent: 3702922 (1972-11-01), Hall, Jr. et al.
patent: 3881098 (1975-04-01), Rich
patent: 4109256 (1978-08-01), Ohnishi

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