Section Ill. TECHNICAL PRINCIPLES OF OPERATION
GENERAL. The original and diazo paper are fed together, original on top, into the printer section.
In the printer section, a belt-driven glass cylinder draws the original and diazo material past four fluorescent
lamps. Exposure starts the decomposition of the diazo dyes. The rate of paper travel is controlled by the
Speed control. The belts are driven by the drive roller, which is in turn chain driven by the drive motor.
Printer belts hold the papers flat on the cylinder. The lamps are controlled by the feed switch. An exhaust
fan blow air through the printer section for cooling. The exposed diazo paper is fed into the developer
section where exposure to ammonia develops the remaining dyes. The closed ammonia system vaporizes
the ammonia liquid and pumps it into the developer section. Excess vapor is neutralized in the absorber
ELECTRICAL. The heater operates when the equipment is plugged in. The main switch controls
power to the pump, blower, drive motor, and fluorescent lamps when the feed switch is depressed. The
Speed of the drive motor is controlled by a speed control switch. The motor direction is controlled by the