Automatic shutdown system for electrophotographic apparatus

Details Automatic shutdown system for electrophotographic apparatus Automatic shutdown system for electrophotographic apparatus

1976-10-12

1978-05-16

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

320 1, G03B 2776

Patent

active

040896021

ABSTRACT:
A flash tube is utilized as an imaging light source for a moving photoconductive belt or the like. A capacitor connected across the flash tube is charged from a power source. The flash tube is triggered when the voltage across the capacitor reaches a sufficient level to discharge the capacitor through the tube thereby firing the tube which emits an intense and brief flash of light for illuminating a document and imaging the photoconductive belt. A failure sensor produces a failure signal in response to a sheet jam or the like. A voltage comparator produces an enable signal when the voltage across the capacitor is sufficient to fire the flash tube. A trigger signal generator triggers the flash tube and shuts down the apparatus in response to the failure and enable signals in coincidence to discharge the capacitor and the photoconductive belt.

REFERENCES:
patent: 3692401 (1972-09-01), Kawai

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