Automatic replenisher system for a photographic processor

Details Automatic replenisher system for a photographic processor Automatic replenisher system for a photographic processor

1975-06-25

1977-11-08

Braun, Fred L.

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

137 93, 250559, 250578, 354324, G03D 1300

Patent

active

040578186

ABSTRACT:
An automatic replenishing system for maintaining the chemical concentration of the liquid in a film processing tank, which automatically energizes a replenishing pump at regular timed intervals (e.g. every 30 seconds) regardless of whether or not the control circuitry indicates a need for replenishment, and which includes an element for sensing the density and velocity of the film and for producing a combined signal which controls the running time of the pump after each energization. The replenishing system also includes a second replenishing pump for maintaining the condition of the liquid in the processing tank, which second pump is energized automatically after a predetermined number of said regular timed intervals, or after a predetermined number of said regular timed intervals in which a zero film density or non-use condition has been detected for a preset running time.

REFERENCES:
patent: 3528040 (1970-09-01), Galvin
patent: 3529529 (1970-09-01), Schumacher
patent: 3554109 (1971-01-01), Street et al.
patent: 3559555 (1971-02-01), Street
patent: 3561344 (1971-02-01), Frutiger et al.
patent: 3752052 (1973-08-01), Hope et al.
patent: 3822723 (1974-07-01), Crowell et al.
patent: 3927417 (1975-12-01), Kinoshita et al.

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