Electrophotographic image printing apparatus

Details Electrophotographic image printing apparatus Electrophotographic image printing apparatus

2007-08-28

2007-08-28

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Photoconductive member

C399S208000

Reexamination Certificate

active

11235149

ABSTRACT:
An image printing apparatus includes a control unit which controls a rotational speed of an image carrier; a detecting unit which detects data of the rotational speed; a storage unit which stores the rotational speeds up to n past rotation cycle of said image carrier; and a determining unit which determines whether a rotational speed difference between a latest rotational speed in a current rotation cycle and a rotational speed in n past rotation cycle before the current rotation cycle at a predetermined interval, which includes the same rotational position in respective rotation cycles and its near position, is more than a predetermined reference value, wherein said control unit controls the rotational speed of said image carrier by using the data of rotational speeds at a predetermined interval including the same rotational position in one or n past rotation cycle before the current rotation cycle, and further said control unit controls a rotational speed in a subsequent rotation cycle next to the current rotation cycle in accordance with a determination result obtained by said determining unit.

REFERENCES:
patent: 6420807 (2002-07-01), Tsujimoto et al.
patent: 6456808 (2002-09-01), Chen et al.
patent: 6501930 (2002-12-01), Oku
patent: 2004/0013440 (2004-01-01), Hayashida et al.
patent: 58023040 (1983-02-01), None
patent: 2000-162941 (2000-06-01), None

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