Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1979-09-17
1982-02-02
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 75, G03G 1500
Patent
active
043136729
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 control operation of the tractor and drive control system, and use is made of a stepper motor having many, small angled rotational movements which can be digitally controlled. A logic circuit arrangement is provided to energize and control the motor so that precise positioning of an edge of each frame section of the fanfold document can be made relative to a platen registration edge. In addition, the logic circuit is adapted to effect acceleration and deceleration of the motor in a controlled sense.
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Schroeder, II Russell G.
Ward Joseph W.
Braun Fred L.
Chiama Bernard A.
Xerox Corporation
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