Vacuum frame

Details Vacuum frame Vacuum frame

1978-05-08

1980-12-23

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355 93, G03B 2760, G03B 2720

Patent

active

042407435

ABSTRACT:
A vacuum frame, comprising a base section, a cover hingeably attached to the base section and including a transparent section, the cover and base section forming a vacuum chamber therebetween when the vacuum frame is in a closed position, a reserve vacuum tank in fluid communication with the vacuum chamber, the vacuum tank adapted to create a vacuum within the vacuum chamber, a vacuum pump in fluid communication with the reserve vacuum tank, the vacuum pump adapted to create a vacuum within the reserve vacuum tank, and an electro-mechanical means for simultaneously regulating the vacuum pressure within the vacuum chamber and reserve vacuum tank and the actuation of the vacuum pump.

REFERENCES:
patent: 2117051 (1938-05-01), Anderson
patent: 2826976 (1958-03-01), Gelb
patent: 3357335 (1967-12-01), Blatherwick
patent: 3359879 (1967-12-01), Hamlin
patent: 3420608 (1969-01-01), Canale
patent: 3644039 (1972-02-01), Boyer
patent: 3995955 (1976-12-01), Topfer

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