Vertical tank for developing photographic material

Details Vertical tank for developing photographic material Vertical tank for developing photographic material

1975-11-12

1977-06-14

Braun, Fred L.

354307, 354316, 354323, 354331, G03D 1300

Patent

active

040301150

ABSTRACT:
A development tank for the daylight development of photographic material comprises inner and outer vessels, axially reciprocal in relation to one another, and defining between them an annular space in which the material to be treated is placed in the absence of light, this space then being closed light-tight by a lid. The inner vessel provides a water bath by which the treatment solution is heated and maintained at the desired temperature. The treatment solution is introduced into a closable conduit and is delivered to the annular space and discharged therefrom by the axial movement of the vessels relative to one another.

REFERENCES:
patent: 2212357 (1940-08-01), Vanderwalker
patent: 2359611 (1944-10-01), Bolsey
patent: 2530734 (1950-11-01), Salzman
patent: 2804003 (1957-08-01), Hoffman
patent: 2957401 (1960-10-01), Hutton
patent: 3587429 (1971-06-01), Morse
patent: 3688678 (1972-09-01), Dalen

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