Processor for photosensitive material

Details Processor for photosensitive material Processor for photosensitive material

1991-09-27

1993-03-23

Gellner, Michael L.

354324, G03D 1300

Patent

active

051968789

ABSTRACT:
A pump circulates water from a wash-water chamber to a diverter valve where it can be directed either to a heat exchanger in a processing fluid chamber or directly back to the water chamber. The temperature of the processing fluid is detected by a sensor, and a microprocessor controls the diverter valve as a function of the temperature detected by the sensor in order to maintain the temperature of the processing fluid at a desired set point. The water temperature increases over a period of time, and may reach a level where the desired set point temperature cannot be maintained. If this occurs, the microprocessor opens a valve to a building water supply to add fresh, cool water to the water chamber.

REFERENCES:
patent: 1772834 (1930-08-01), Hopkins
patent: 3613547 (1971-10-01), Snarr et al.
patent: 4754298 (1988-06-01), Nishimoto
patent: 4937608 (1990-06-01), Ishikawa et al.
patent: 4994840 (1991-02-01), Hall et al.
patent: 4995913 (1991-02-01), Juers
patent: 5023643 (1991-06-01), Lynch et al.
patent: 5027145 (1991-06-01), Samuels

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