Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1979-09-17
1982-03-23
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 14SH, 355 75, G03G 1500
Patent
active
043209602
ABSTRACT:
An automatic duplicating system in which computer fanfold documents are fed by an automatic handling apparatus having a tractor and drive control system for advancing the document across the platen of the processor for the system. An arrangement is provided which will shut down the system in the event there is a break in the fanfold material during a reproduction run or the end of the document has been attained during normal operation. Sensing devices are utilized in the path of movement of the document and a circuit is provided to produce a train of pulses in accordance with the movement of the document. The frequency of the train of pulses is compared with a reference frequency to insure proper operation.
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Schroeder, II Russell G.
Ward Joseph W.
Braun Fred L.
Chiama Bernard A.
Xerox Corporation
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