Developing apparatus for diazotype material, especially for use

Details Developing apparatus for diazotype material, especially for use Developing apparatus for diazotype material, especially for use

1977-12-15

1980-12-23

Hix, L. T.

354300, 34155, G03D 1300

Patent

active

042407362

ABSTRACT:
This invention relates to an improvement in a developing apparatus, especially as part of a photoprinting machine, for developing diazotype copying material capable of being developed by an atmosphere containing gaseous ammonia and water vapor, including a developing chamber comprising at least one first, heated, inclined evaporator trough to which fresh ammonia is adapted to be fed at one side while ammonia water with a reduced ammonia content is adapted to be drained off at the other side, the ammonia water with the reduced ammonia content being adapted to form a pool, and further comprising a siphon through which the ammonia water with the reduced ammonia content and condensate formed in the developing chamber are adapted to be drained off, the improvement that the siphon forms part of an evaporator arranged outside of the developing chamber from which a developer gas pipe leads into the developing chamber, and further comprising a, preferably unheated, reservoir for the ammonia water with the reduced ammonia content adapted to flow from the evaporator trough, the reservoir substantially covering the entire floor space of the developing chamber and being completely open at its top, having an opening which leads to the outside evaporator and being positioned in the chamber at such a level that the bottom of the reservoir is adapted to be completely covered by the pool of ammonia water with reduced ammonia content. The invention also relates to a method of operating the developing apparatus.

REFERENCES:
patent: 2047104 (1936-07-01), Morse
patent: 2475165 (1949-07-01), Trump
patent: 2630744 (1953-03-01), Wilde
patent: 3147687 (1964-09-01), Halden
patent: 3943538 (1976-03-01), Hilgers et al.
patent: 4003069 (1977-01-01), Hilgers
patent: 4062031 (1977-12-01), Shroter

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