Wash water reservoiring method

Details Wash water reservoiring method Wash water reservoiring method

1989-05-26

1990-12-11

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210755, 210764, C02F 168

Patent

active

049768700

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: 2692855 (1954-10-01), Juda
patent: 3912627 (1975-10-01), Tepas
patent: 4548716 (1985-10-01), Boeve

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