| 摘要 |
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 develop er 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 operatio n 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 fi lm 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 ar e mounted. Oxygen sensors with throttling exhaust devices outside the develope r tank sound an alarm when oxygen level is too high in the developer tank. Reservoir fluid seals may also be used on secondary tanks.
|
