Arrangement for and a method of processing photosensitive articl

Details Arrangement for and a method of processing photosensitive articl Arrangement for and a method of processing photosensitive articl

1982-09-21

1984-11-06

Mathews, A. A.

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

354298, 354324, 137392, G03B 306, G03B 308

Patent

active

044809018

ABSTRACT:
A developing apparatus for photosensitive material has a processing bath and a conveying system for advancing photosensitive material through the path. A supply vessel accommodates a regenerating solution for the bath and a flow regulating device such as a pump or a valve is provided to regulate the admission of the regenerating solution into the bath. A sensing system senses the surface area of the photosensitive material advanced into the bath and supplies this information to a computer which then calculates the quantity of regenerating solution to be supplied to the bath. The control unit operates the flow regulating device at intervals in order to deliver the calculated quantity of regenerating solution to the bath. A measuring unit connected with the computer measures the actual quantity of regenerating solution supplied to the bath during operation of the flow regulating device. The actual and calculated quantities of the regenerating solution are compared by the computer which performs a correction in these quantities are different. The computer may also be programmed to generate an alarm if corrections must be made too frequently or if the difference between the actual and calculated quantity of the regenerating solution is excessively large.

REFERENCES:
patent: 3905698 (1975-09-01), Schroter et al.
patent: 4021832 (1977-05-01), Krehbiel et al.
patent: 4057817 (1977-11-01), Korb et al.
patent: 4057818 (1977-11-01), Gaskell et al.
patent: 4134663 (1979-01-01), Laar et al.
patent: 4284343 (1981-08-01), Junghanns
patent: 4293211 (1981-10-01), Kaufmann

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