Developing apparatus for duplicating of film patterns on diazo-m

Details Developing apparatus for duplicating of film patterns on diazo-m Developing apparatus for duplicating of film patterns on diazo-m

1979-04-02

1980-04-08

Hix, L. T.

354300, 354317, 354324, 34219, G03D 700

Patent

active

041969995

ABSTRACT:
Film patterns are duplicated onto diazo-material in a developing apparatus which has a circulatory flow circuit with a pump for the developer ammonia gas to circulate the latter in sequential steps between a developing chamber and an ammonia gas supply container. Magnetic control valves open and close other valves in the closed circuit and in access circuits to make sure that the developing takes place in said sequence. The access circuits include an auxiliary gas container, a further pump and a vacuum container as well as further controlling and controlled valves for the sequence control.

REFERENCES:
patent: 1904551 (1933-04-01), Smith
patent: 3323436 (1967-06-01), Hafer et al.
patent: 3748995 (1973-07-01), Schroter et al.
patent: 4048645 (1977-09-01), Reams
patent: 4121236 (1978-10-01), Welp et al.

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