Temperature control system for a photographic processor

Details Temperature control system for a photographic processor Temperature control system for a photographic processor

1987-06-12

1988-07-05

Mathews, A. A.

354324, G03D 302

Patent

active

047558431

ABSTRACT:
Method and apparatus are provided for controlling the temperature of processing fluids in photographic processors. A tank of developing fluid includes a dedicated temperature sensor, heating element, and control circuit for controlling the heating element responsive to the temperature sensor. A tail portion of the processor, including at least two additional tanks of processing fluids, includes a single temperature sensor disposed in a selected one of the fluids. Each tank includes a heating element, each heating element being sized in proportion to the corresponding volume of processing fluid to be heated thereby. A single control circuit is provided, responsive to the single temperature sensor, for controlling both of the heating elements.

REFERENCES:
patent: 1967889 (1934-07-01), Kitroser
patent: 3526272 (1968-07-01), Watts et al.
patent: 3613547 (1971-10-01), Snarr
patent: 4138607 (1979-02-01), Engelmann
patent: 4153363 (1979-05-01), Albano
patent: 4160153 (1979-07-01), Melander
patent: 4316663 (1982-02-01), Fischer
patent: 4625096 (1986-11-01), Fletcher

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