Photosensitive sheet processor

Cleaning and liquid contact with solids – Apparatus – Sequential work treating receptacles or stations with means...

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Details

354298, 354319, 134 57R, G03D 308

Patent

active

043008283

ABSTRACT:
A processor of sheets of photosensitive material includes an entrance opening through which sheets enter the processor, developer, fix and wash tanks; a dryer; an exit opening through which the sheets exit the processor; and a transport system for transporting the sheets through the processor. Signals from a film sensor positioned proximate the entrance opening indicate when a leading edge and a trailing edge of each sheet enters the processor. An encoder provides signal pulses for each incremental movement of a drive shaft which drives the transport system. The signal pulses, which provide an indication of the linear travel of the sheets through the processor, are counted. Based upon the signals from the film sensor and the counted pulses, a signal is provided when the trailing edge of the last sheet passes out of the developer tank, so that the speed of the transport can be changed without affecting the developing of the images on the last sheet. Another signal is provided which indicates when the trailing edge of the last sheet enters the wash tank. This signal is used to indicate when previously processed sheets may be fed back into the wash tank of the processor for rewashing and redrying without interfering with the last sheet being processed.

REFERENCES:
patent: 3763758 (1973-10-01), Manack et al.
patent: 3852793 (1974-12-01), McClintock
patent: 3927417 (1975-12-01), Kinoshita et al.
patent: 4057817 (1977-11-01), Korb

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