Developing unit and image forming apparatus

Details Developing unit and image forming apparatus Developing unit and image forming apparatus

2006-10-03

2006-10-03

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Development

C399S375000, C399S384000

Reexamination Certificate

active

07116932

ABSTRACT:
A developing unit includes a developer containing unit that contains developer, a developer carrier that has a moving surface, and carries the developer, a magnetic force generator that attracts the developer onto the moving surface by a magnetic force generated from a plurality of magnets, and a restricting member that restricts a layer thickness of the developer. The magnets includes a restricting magnet arranged closest to the restricting member and has a restricting magnetic pole of which a first surface toward the moving surface and a second surface toward an upstream adjacent magnet that is arranged so as to be adjacent to an upstream side of the developer carrier in a direction of movement of the moving surface and has an upstream adjacent magnetic pole form a ridged corner portion, and the ridged corner portion is chamfered.

REFERENCES:
patent: 4165393 (1979-08-01), Suzuki et al.
patent: 4171899 (1979-10-01), Yanagawa et al.
patent: 4193679 (1980-03-01), Mochnizuki et al.
patent: 4194830 (1980-03-01), Ohnuma et al.
patent: 4201465 (1980-05-01), Oyama et al.
patent: 4286543 (1981-09-01), Ohnuma et al.
patent: 4350749 (1982-09-01), Ohnuma et al.
patent: 4382420 (1983-05-01), Ohnuma et al.
patent: 4406536 (1983-09-01), Suzuki et al.
patent: 4760427 (1988-07-01), Oyama et al.
patent: 4792825 (1988-12-01), Saito et al.
patent: 4821075 (1989-04-01), Saito et al.
patent: 4989043 (1991-01-01), Suzuki et al.
patent: 5083160 (1992-01-01), Suzuki et al.
patent: 5182600 (1993-01-01), Hasegawa et al.
patent: 5198861 (1993-03-01), Hasegawa et al.
patent: 5260748 (1993-11-01), Kahle
patent: 5450177 (1995-09-01), Oyama
patent: 5467175 (1995-11-01), Takagaki et al.
patent: 5493382 (1996-02-01), Takagaki et al.
patent: 5502552 (1996-03-01), Iwata et al.
patent: 5604575 (1997-02-01), Takagaki et al.
patent: 5655200 (1997-08-01), Oyama
patent: 5659860 (1997-08-01), Sasaki et al.
patent: 5737680 (1998-04-01), Takagaki et al.
patent: 5758241 (1998-05-01), Oyama et al.
patent: 5771426 (1998-06-01), Oka et al.
patent: 5771429 (1998-06-01), Oyama et al.
patent: 5805965 (1998-09-01), Tsuda et al.
patent: 5822664 (1998-10-01), Oka et al.
patent: 5864733 (1999-01-01), Mae et al.
patent: 5937228 (1999-08-01), Shoji et al.
patent: 5953568 (1999-09-01), Fujishiro et al.
patent: 6035169 (2000-03-01), Miyake et al.
patent: 6081684 (2000-06-01), Naganuma et al.
patent: 6366751 (2002-04-01), Shakuto et al.
patent: 6442364 (2002-08-01), Kai et al.
patent: 6463244 (2002-10-01), Aoki et al.
patent: 6505014 (2003-01-01), Aoki et al.
patent: 6526248 (2003-02-01), Aoki et al.
patent: 6597885 (2003-07-01), Kai et al.
patent: 6611672 (2003-08-01), Aoki et al.
patent: 6625409 (2003-09-01), Shakuto et al.
patent: 6654579 (2003-11-01), Shakuto et al.
patent: 6658227 (2003-12-01), Oyama et al.
patent: 6665511 (2003-12-01), Takeuchi et al.
patent: 6721516 (2004-04-01), Aoki et al.
patent: 6757509 (2004-06-01), Shoji et al.
patent: 6778805 (2004-08-01), Kai et al.
patent: 6844126 (2005-01-01), Ohmura et al.
patent: 6898406 (2005-05-01), Suzuki et al.
patent: 6963720 (2005-11-01), Endo et al.
patent: 2002/0028093 (2002-03-01), Miyoshi et al.
patent: 2004/0265014 (2004-12-01), Takeuchi et al.
patent: 5-35067 (1993-02-01), None
patent: 9-146374 (1997-06-01), None
patent: 11-161007 (1999-06-01), None
U.S. Appl. No. 11/210,826, filed Aug. 25, 2005, Matsuura et al.

Affiliated with

Also associated with

Rating

Developing unit and image forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Developing unit and image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developing unit and image forming apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3660471