Developing apparatus for high resolution photo-sensitive diazo p

Details Developing apparatus for high resolution photo-sensitive diazo p Developing apparatus for high resolution photo-sensitive diazo p

1977-03-29

1979-01-23

Gonzales, John

354300, 34 36, G03D 700

Patent

active

041358031

ABSTRACT:
An apparatus for developing high resolution photosensitive diazo plates by exposure to ammonia vapor is provided. The apparatus comprises a reservoir for aqueous ammonia, heating means for vaporizing said aqueous ammonia to produce humidified ammonia vapor within said reservoir, means for introducing air into said reservoir to mix with the ammonia vapors, a condensation chamber in communication with said reservoir to receive the ammonia vapor-air mixture to condense any liquid ammonia droplets therefrom, a developing chamber having an inlet and outlet and means for holding a plurality of high resolution photo-sensitive plates in the line of flow from the inlet to the outlet, a three-way valve to selectively communicate the condensation chamber and the inlet of the developing chamber to introduce the ammonia developing medium therein, and the exterior of the apparatus and the developing chamber to introduce ambient air therein for flushing said ammonia from the developing chamber, and a vacuum pump in communication with the outlet of the developing chamber to cause the flow of ammonia through the developing chamber in contact with the photo-sensitive plates during the development process, and to cause the flow of ambient air therethrough to evacuate the ammonia from the developing chamber during the flushing process. The ammonia evacuated from the developing chamber during both the development process and the flushing process is carried via the vacuum pump to an absorption vessel to neutralize the same.

REFERENCES:
patent: 2761364 (1956-09-01), Cross
patent: 3720150 (1973-03-01), Hurtig
patent: 3900862 (1975-08-01), Bennett
patent: 3982258 (1976-09-01), Czenbiniak
patent: 4048645 (1977-09-01), Reams
patent: 4062031 (1977-12-01), Schroter

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