Copying frame for producing offset plates

Details Copying frame for producing offset plates Copying frame for producing offset plates

1985-09-23

1986-12-02

Hayes, Monroe H.

Photocopying

Contact printing

Exposing on sensitized printing press plate or cylinder

355 87, 355 91, G03B 2704

Patent

active

046260986

ABSTRACT:
A copying frame machine for producing offset plates includes a rubber cover, a copying frame having a glass plate superimposable on the rubber cover so as to sandwich and lock therebetween an offset printing plate, a film and a sheet of copying material, means for applying a vacuum between the rubber cover and the glass plate, and vibration-generating means for applying vibration to at least one of the glass plate and the rubber cover.

REFERENCES:
patent: 2975694 (1961-03-01), Pell
patent: 3625611 (1971-12-01), Orr et al.
patent: 4029404 (1977-06-01), Mizukami et al.
patent: 4089603 (1978-05-01), Jacobs

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