Developing unit, process cartridge, and image forming apparatus

Details Developing unit, process cartridge, and image forming apparatus Developing unit, process cartridge, and image forming apparatus

2008-04-29

2008-04-29

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Development

C399S254000, C399S256000

Reexamination Certificate

active

11126286

ABSTRACT:
A developing unit includes a developer container that includes an opening and holds a developer; a first screw that stirs and conveys the developer, and that supplies the developer to a developing roller; a second screw that stirs the first developer, and that conveys the developer to a direction opposite to a direction to which the first screw conveys the developer; and a partition wall that partitions between the first screw and the second screw. The partition wall includes a guiding member that guides, to a position within a range in which rotation of the first conveying unit reaches, a part of the developer that is supplied to the developing roller and is returned after being used for development from the developing roller, and at least a part of the guiding member is an adhesion surface to which a sealing member for sealing the opening is adhered.

REFERENCES:
patent: 2002/0106222 (2002-08-01), Chadani et al.
patent: 1217489 (1999-05-01), None
patent: 1490683 (2004-04-01), None
patent: 1 403 742 (2004-03-01), None
patent: 2002-287472 (2002-10-01), None
patent: 2003-5517 (2003-01-01), None
Machine Translation JP 2002287472 A Oct. 2002 Japan.
Irie et al., JP 2003005517 A, Jan. 8, 2003, Machine Translation.
U.S. Appl. No. 11/372,142, filed Mar. 10, 2006, Zemba.

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