Chemical recycler for photo processing machine

Details Chemical recycler for photo processing machine Chemical recycler for photo processing machine

1992-05-08

1994-05-31

Rutledge, D.

G03D 302

Patent

active

053173600

ABSTRACT:
A device for recycling developer and fixer into a photo processing machine. The device includes a first container for receiving and containing a chemical liquid flowing from the overflow outlet of one of the chemical tanks of the photo processing machine and a second container for receiving and containing a mixture of used chemical liquid from the first container and fresh unused chemical from a source thereof. A pump is provided for pumping a fixed ratio of the liquid from the first container and the fresh unused chemical into the inlet of the second container. An outlet in said second container is connected to the one of said replenishment pumps connected to the appropriate tank of the photo processing machine. The pump for pumping the fixed ratio of liquids is preferably a dual head bellows type metering pump. A preferred pumping ratio provides for delivery of 45% recycled chemical and 55% new chemical with each pump stroke. A high limit float switch to deactivate the pump inputting liquids and a low limit float switch to activate pumping of liquids therein when the liquid in said container falls below a selected level are preferably provided.

REFERENCES:
patent: 3557752 (1971-01-01), Hakanson
patent: 3990088 (1976-11-01), Takita
patent: 4349267 (1982-09-01), Ohtani
patent: 4506986 (1985-03-01), Freeman
patent: 4577950 (1986-03-01), Mackson
patent: 4650339 (1987-03-01), Chetcuti et al.
patent: 4728408 (1988-03-01), Palazzolo
patent: 4804452 (1989-02-01), Rhodes
patent: 4999660 (1991-03-01), Wright

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