Photocopying – Contact printing – Light boxes
Patent
1987-09-02
1992-07-14
Braun, Fred L.
Photocopying
Contact printing
Light boxes
G03G 2100
Patent
active
051307499
ABSTRACT:
An electrophotographic copying machine is of the type which starts, in response to the actuation of a copy start switch, its copying operation after a pre-copy process is conducted to stabilize the property of a photoreceptor. The copying machine includes a timer. The timer is started automatically upon the termination of a previous copying operation. During a time as set for the timer, the pre-copy process is carried out following the termination of the previous copying operation. In response to the actuation of the copy start switch, the following copying operation is started just following the termination of the previous copying operation. In a preferred form of the present invention, a ready lamp is provided for indicating that the copying operation is now possible, the ready lamp being switched on in response to the completion of the previous copying operation. In another preferred form of the present invention, the position of a photoreceptor is detected.
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Underhill, T. T., "Erase Lamp Control", IBM Technical Disclosure Bulletin, vol. 19, No. 2, Jul. 1976, pp. 393 and 394.
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