Principles of cinematography : a handbook of motion picture technology (1953)

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86 PRINCIPLES OF CINEMATOGRAPHY Fig. 40. — Compressed air squeegee. compartment. This is necessary for two reasons, firstly to enable the film to be dried in the shortest possible time and with the least amount of heat and, secondly, to avoid drying marks which would otherwise occur if spots of water were * dried into' the film emulsion or its supporting base. In this machine an air squeegee is attached to the outside of the drying cabinet in such a manner that the film passing from the last washing tank into the cabinet must pass between the two nozzles of the squeegee. The squeegee, shown in Figure 40, consists of a vertical plate on which are mounted the two air nozzles one above and one below the film, together with a series of guiding rollers. The nozzles are locked to the vertical plate in such a manner that the angle between the air stream and the film surface may be adjusted. The guide rollers support the film on the base side, and