Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1979-12-06
1982-06-01
Moses, Richard L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 8, 355 55, G03G 1500
Patent
active
043324614
ABSTRACT:
A scanning continuously variable reduction electrophotographic copier includes a servo motor for driving the document scanning carriages. Servo motor, and therefore carriage motion parameters of velocity, duration of acceleration and deceleration, length or time duration of travel and time of start of scan are selectable to produce a selected reduction ratio within a continuous range of reduction ratios. In one embodiment, three partially overlapping hybrid servo loops are used, one for acceleration and deceleration, another for constant velocity motion and a third for precise stopping control. In another embodiment, a single loop controls the entire motion.
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Cail Norman
Daniels Raymond A.
Eggerling John B.
Lammers Gerald B.
IBM Corporation
Moses Richard L.
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