Drive control device and image forming apparatus including...

Electrophotography – Image formation – Transfer

Reexamination Certificate

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Details

C347S116000, C399S162000, C399S301000, C399S313000

Reexamination Certificate

active

06842602

ABSTRACT:
A device for controlling the drive of an endless movable member of the present invention includes a mark sensor responsive to a plurality of marks continuously positioned on the movable member at preselected intervals in the direction of movement of the movable member. A speed/position controller controls either one of speed and position by using the output of the mark sensor. A discontinuity sensing circuit determines whether or not a discontinuous portion in which a distance between nearby marks does not lie in a preselected range is present in a sensing region assigned to the mark sensor. The speed/position controller varies speed control or position control in accordance with the output of the discontinuity sensing circuit.

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patent: 5729024 (1998-03-01), Baba et al.
patent: 5818062 (1998-10-01), Baba et al.
patent: 5929436 (1999-07-01), Baba et al.
patent: 6252682 (2001-06-01), Baba et al.
patent: 6336019 (2002-01-01), Castelli et al.
patent: 6360064 (2002-03-01), Regelsberger et al.
patent: 62-059973 (1987-03-01), None
patent: 2000-132047 (2000-05-01), None

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