Wash water reservoiring method and apparatus therefore

Details Wash water reservoiring method and apparatus therefore Wash water reservoiring method and apparatus therefore

1988-02-12

1989-08-15

Mathews, A. A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

354322, 210251, G03D 306

Patent

active

048579505

ABSTRACT:
In photographic processing apparatus for developing, bleaching-fixing and washing photographic materials, a predetermined quantity of fresh wash water is supplied into a washing tank every time a predetermined amount of the photographic materials have been washed. The fresh wash water is provided by deionizing city water and is reservoired in a replenisher tank. In order to detect a predetermined loss of the fresh wash water in the replenisher tank, a conductivity increasing material is dissolved in the fresh wash water in the replenisher tank when a predetermined quantity of the deionized water is supplied so as to electrically connect a pair of electrodes disposed at a predetermined depth of the replenisher tank. A sterilizer is mixed in the fresh wash water to prevent bacterial growth in the replenisher tank. The conductivity increasing material and the sterilizer are prepared as a predetermined dose of mixture necessary and sufficient for the predetermined quantity of deionized water supplied into the replenisher tank.

REFERENCES:
patent: 3733994 (1973-05-01), Armstrong et al.
patent: 3911460 (1975-10-01), Lasky et al.
patent: 4197000 (1980-04-01), Blackwood
patent: 4451132 (1984-05-01), Kishimoto
patent: 4801961 (1989-01-01), Hirai et al.

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