Image forming apparatus with a cleaning operation to improve...

Details Image forming apparatus with a cleaning operation to improve... Image forming apparatus with a cleaning operation to improve...

2011-05-17

2011-05-17

Gray, David M (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S302000, C399S308000

Reexamination Certificate

active

07945188

ABSTRACT:
An image forming apparatus includes an image bearing member, a charging member, a toner image forming device for forming an image on the image bearing member, and an intermediary transfer member for carrying a toner image. A cleaning member removes toner remaining on the image bearing member, a speed switching device selectively set a speed of the recording material, and an intermediary transfer member speed switching device switches a rotational speed of the intermediary transfer member after the toner image is transferred. A charging control device render off a DC voltage applied to the charging member after transfer of the toner image and while the intermediary transfer member is carrying the toner image. A charging member cleaning control devices permits, when a signal for starting image formation is inputted, a cleaning operation for discharging toner deposited on the charging member to the image bearing member before starting the image formation.

REFERENCES:
patent: 5765076 (1998-06-01), Ogata et al.
patent: 5839026 (1998-11-01), Ko
patent: 6449448 (2002-09-01), Bessho et al.
patent: 6529698 (2003-03-01), Nagata
patent: 6591072 (2003-07-01), Hashimoto et al.
patent: 2001-75454 (2001-03-01), None
patent: 2003-091146 (2003-03-01), None
Machine Translation of Tsukida et al. JP-2001-075454.
Chinese Office Action mailed Jul. 4, 2008 in Application No. 200610164238.3, with English-language translation.
English-language translation of JP 2001-75454 A (Tsukida et al.)

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