Developing unit including developer conveyance system having...

Details Developing unit including developer conveyance system having... Developing unit including developer conveyance system having...

2011-08-02

2011-08-02

Grainger, Quana M (Department: 2852)

Electrophotography

Image formation

Development

Reexamination Certificate

active

07991330

ABSTRACT:
A developing unit includes a developer bearing member, a developer transporter, a developer conveyance system for directing the developer, including a supply path, a recovery path, and an agitation path, a developer supply opening through which the developer is supplied to the developer conveyance system, a developer supply device for supplying the developer from the developer supply opening to the developer conveyance system, a developer discharge device for discharging the developer outside the developing unit, a developer level rise detector for detecting increase in a level of the developer between the downstream end of the recovery path facing the developer bearing member in the direction of developer transport and a portion of the agitation path where the agitation path receives the collected developer from the recovery path, and a controller for controlling the developer discharge device based on the detection result provided by the developer level rise detector.

REFERENCES:
patent: 2007/0071502 (2007-03-01), Shimizu
patent: 2007/0127951 (2007-06-01), Ishikawa et al.
patent: 2007/0217798 (2007-09-01), Tsuji et al.
patent: 2008/0124136 (2008-05-01), Oshikawa
patent: 2008/0175628 (2008-07-01), Kita et al.
patent: 2008/0181670 (2008-07-01), Tsuda et al.
patent: 2000-98744 (2000-04-01), None
patent: 3264765 (2001-12-01), None
patent: 2005-292511 (2005-10-01), None
Computer Translation of cited reference JP2005-292511A.

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