Title: Processing system utilizing a multi-purpose film handling cartridge

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Abstract: A system for processing a strip of motion picture film with a multi-purpose film handling cartridge adapted for use in film-exposing, processing and projection operations. Responsive to varying rates of travel of the film strip across a processing station provided in the cartridge as it is being transported between the paired spools to which respective ends of the film strip are attached, a variable-speed driving mechanism mounted externally of the cartridge controls the speed of the spool to establish a constant rate of travel of the film strip across the processing station at any particular instance even though the winding diameters of the film strip on the spools are ever being varied, so that a uniform application of a coating of processing fluid is effected along the length of the exposed film strip without the necessity of providing any particular constant speed device within the cartridge. The variable speed driving mechanism is associated with an actuating member adapted to be accessible to the operator from the outside of the system housing and which once manually operated for actuation cannot be released from the actuating position by hand but automatically released when the entire length of the film strip has been processed to thereby prevent accidental interruptions of the running processing operation.


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