Abstract: Spot film apparatus which includes a menu-driven microprocessor for producing control signals to position a film cassette as required to carry out operations in a manner shown on a display. The spot film apparatus includes an improved carriage assembly which comprises a pair of opposing holding arms which conform with the film cassette. The opposing holding arms are biased towards each other with a helical spring. Loading of a cassette into the arms is accomplished by moving one arm with a continuous chain drive which supports a pawl-like member projecting therefrom, while maintaining the position of the second arm.