G - Physics – 03 – D
Patent
G - Physics
03
D
G03D 3/13 (2006.01)
Patent
CA 2547218
A high speed motion picture film processor has a developer tank having a positive pressure relative to an ambient air pressure outside of the tank. A gas make-up system adds nitrogen inside of the developer tank while a system of seals minimizes leakage. Two seals are used along a periphery of the developer tank; one is below a sprocket level while the other is above the sprocket level. These two barriers can utilize a liquid reservoir that is filled by operation of the processor with excess liquid returning to the developer tank and they are constructed so as to allow movement. A film entrance sealing device and a film exit sealing device, each with its own housing, are also used with the developer tank; these units use a pair of rollers and a pair of flexible barriers to separate a tank gas chamber from an air chamber which is at a lower pressure and which contains a partial pressure of nitrogen fed into the entrance sealing device. The level of developer fluid is maintained at approximately the centerline of a first roller shaft but below that of a second roller shaft. The sprocket shaft has two smaller shafts mounted in metal bearings and a center tube on which the sprockets are mounted. Oxygen sensors with throttling exhaust devices outside the developer tank sound an alarm when oxygen level is too high in the developer tank. Reservoir fluid seals may also be used on secondary tanks.
Michelson Manfred G.
Smart & Biggar
LandOfFree
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