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From Film
Developer ShortStop Pump Pump
Solenoid-Operated Slide Valves From From From
To Developer To
Tank Short-Stop
Solenoid-Operated Slide Valves
Fig. 3. Turbulent developing chamber and slide valves.
which the film is fastened and onto which the turbulent flow channel is attached. When the draw slide is pushed into the unit it is sealed by means of a gasket, firmly connected on the outside and clamped by means of three screw handles. The fluid entrance and exit consist of two 1-in. stainless-steel nipples press-fitted into two lucite endpieces. Adjacent to the endpietes are two plenum chamber sections to provide a space in which the fluid pressure can be equalized across the channel face. From the plenum chamber the fluid goes through a narrowing section until the channel has the desired configuration of the channel above the film. The film slide contains
Fig. 4. Cross section through turbulent developing channel.
two clamps in which the film is clamped. The film strips are approximately in. long by If in. wide. The two film clamps are designed in such a manner as to cause a minimum of flow disturbance. A steel and sponge-rubber hinge assembly closes on the outside of the chamber to minimize leakage.
The third component of the equipment is the control panel (see Fig. 8). It contains all the electrical control components and circuits. The lower four buttons control the 1-hp motors which operate the pumps. A set of buttons across the top of the panel control the solenoid valves. The timers are mounted below the buttons and a selector switch has been mounted so as to permit the introduction of the timers into any one of the circuits. One tinier controls the time during which the fluid is pumped through the chamber. At the end of the pumping cycle, as selected by the selector switch, the fluid valve automatically closes and an air stream is sent through the chamber to flush the system for a short period of time. The
Katz and Esthimer: Turbulent Fluid Processing
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