Photocopy developing apparatus for diazo film

Details Photocopy developing apparatus for diazo film Photocopy developing apparatus for diazo film

1976-11-29

1978-10-24

Hix, L. T.

354299, 34 37, 34155, G03D 700

Patent

active

041224744

ABSTRACT:
An apparatus for developing diazotype copy sheets is provided and comprises a duct element having an ingress and an egress end, a distribution element having an ingress end and a closed end, a manifold at the ingress ends of the duct and the distribution elements and a heater element proximate the duct element. All of the elements are enclosed within a developer tank provided with a perforated section adjacent a copy sheet developing station. Aqueous ammonia is supplied to the ingress end of the duct element and travels in a first path by gravity towards the egress end thereof. In its travel in the first path the aqueous ammonia is vaporized by the heater element thereby causing separation of the aqueous ammonia into a first portion of residue water comprising hot water and a trace of ammonia, and a second portion comprising ammonia gas and steam. The first portion exits from the egress end of the duct element to a waste eliminator device and the second portion travels in the opposite direction in the first path to the manifold which directs the second portion to the distribution element for travel in a second path. The second portion is expelled from ports provided in the distribution element to generate a gaseous ammonia atmosphere which passes through the perforated section of the developer tank and impinges upon a copy sheet to be developed at the developing station.

REFERENCES:
patent: 2475165 (1949-07-01), Trump
patent: 2630744 (1953-03-01), Wilde
patent: 2761364 (1956-09-01), Cross
patent: 2895397 (1959-07-01), Hurlbut
patent: 3915708 (1975-11-01), Zausmer et al.

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