Photography printing frame

Details Photography printing frame Photography printing frame

1983-09-26

1985-03-12

Gonzales, John

Photocopying

Contact printing

Fluid pressure retention of carrier and receiver in exposure...

G03B 2720

Patent

active

045041423

ABSTRACT:
An improved contact photo vacuum frame includes a specially constructed inflatable bladder which backs up the pressure blanket. The bladder is divided into a plurality of interconnected compartments by means of partitions, arranged in such a way that the compartments inflate sequentially, progressively forcing the air from between the contacting photo films in a predetermined pattern, insuring more intimate contact between the films. Alternative embodiments provide specific inflation patterns. A vacuum source can operate simultaneously to evacuate the volume between the film layers.

REFERENCES:
patent: 628347 (1899-07-01), McDade
patent: 725969 (1903-04-01), Jaray
patent: 3995955 (1976-12-01), Topfer

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