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Jan., 1950.
LEVENSON : EXPERIMENTAL PROCESSING MACHINE
*v
Fig. 8. Machine built on the lines illustrated in Fig. 7 by Weyers Bros., for British Lion Studios. Each tank is water-jacketed and thermostatically controlled. The Negretti and Zambra control unit is shown inset. The drying cabinet is sebarate from the wet end so that it can be installed in an
adjoining light room.
of the speed within the ranges is achieved by a resistor in the motor circuit. The rewind is driven by a leather belt and slipping clutch, and has a set of hubs to accommodate the various widths of film.
Splices in the film are made by binding the ends together with adhesive tape. This gives a flat, flexible splice that will pass round the rubber driving roller without causing any damage. Because there are no sprockets in the machine, and the film is pulled through, it is possible to splice 16 mm. film to 35 mm. film and process them consecutively, assuming that they both require the same treatment.
Conclusion
f Experience with our present machine has shown it to be of considerable usefulness in tackling a number of jobs requiring continuous treatment, ranging from ordinary motion picture processing, to the application of solvent to remove scratches from projected film. However, in the light of experience gained with the present machine, certain modifications are suggested that would seem likely to improve the apparatus without greatly detracting from its chief virtue of simplicity and adaptability.
It is suggested that the present style of rack for holding the tanks should be modified to a back frame with short projecting arms on which each tank could be suspended. This would enable any given tank to be removed without having to disturb and empty any of the others (Fig. 7). The holders for the elevator