Accurate dosing of regenerating fluid to processing-fluid-tank i

Details Accurate dosing of regenerating fluid to processing-fluid-tank i Accurate dosing of regenerating fluid to processing-fluid-tank i

1978-08-30

1981-04-28

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Self-proportioning flow systems

73198, 128214C, 137433, 137572, 222 64, 354324, F16K 3300, G05D 902

Patent

active

042639328

ABSTRACT:
The film developing machine includes a tank containing developing fluid, to which a dosing device continually adds regenerating fluid received from a regenerating-fluid supply tank. To prevent the gradual emptying of the supply tank from producing an accuracy-reducing gradual decrease in the pressure applied to the input side of the dosing device, the latter is connected to the supply tank via a buffer vessel provided with an internal valve mechanism serving automatically to keep the volume of regenerating fluid in the buffer vessel substantially constant despite variations in the amount of regenerating fluid contained in the supply tank.

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