Photographic process with improved replenishment monitoring syst

Details Photographic process with improved replenishment monitoring syst Photographic process with improved replenishment monitoring syst

1996-05-29

1997-11-18

Rutledge, D.

Photography

Fluid-treating apparatus

Having testing, calibration, or indicating

396626, 73308, 422 63, G03D 302

Patent

active

056897480

ABSTRACT:
A method and apparatus for processing a photosensitive material. The apparatus includes at least one processing section and a replenishment system for delivering replenishment solution contained within a container to the processing section. The replenishment system including a single device for withdrawing replenishment solution from the container and for monitoring the level of the replenishment solution contained in the container. The container is made of a material that is electrically non-conductive. A pair of spaced electrically conductive members are provided within the container. One of the members has a passageway for allowing withdrawal of the replenishment solution from the container and has a terminal end which extends below the other member within the container. An AC current is applied to the pair of spaced members and the AC current is monitored with a level sensing circuit. When the replenishment solution falls below the end of the shorter member, a low level indicating signal is produced by the level sensing circuit.

REFERENCES:
patent: 3787829 (1974-01-01), Schneier
patent: 4410020 (1983-10-01), Lorenz
patent: 4451433 (1984-05-01), Yamashita et al.
patent: 5011571 (1991-04-01), Kobayashi et al.
patent: 5313243 (1994-05-01), Rosenburgh et al.
patent: 5541698 (1996-07-01), Van Den Bergen

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