Developing apparatus and image forming apparatus

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

2007-03-06

2009-10-27

Gray, David M (Department: 2852)

Electrophotography

Image formation

Development

C399S270000, C399S277000

Reexamination Certificate

active

07610002

ABSTRACT:
An image forming apparatus includes a rotatable image bearing member; a first rotatable developer carrying member for carrying a magnetic one component developer to a first developing position to develop a latent image on the image bearing member; a second rotatable developer carrying member, provided downstream of the first developer carrying member with respect to a rotational direction of the image bearing member, for carrying the magnetic one component developer to a second developing position to develop a latent image on the image bearing member. The second developer carrying member is rotatable in the same rotational direction as the first developer carrying member. The image forming apparatus further includes, a first magnetic member provided in the first developer carrying member and having a plurality of magnetic poles, and a second magnetic member provided in the second developer carrying member, also having a plurality of magnetic poles.

REFERENCES:
patent: 6330414 (2001-12-01), Takuma et al.
patent: 6959163 (2005-10-01), Nishiyama
patent: 6978108 (2005-12-01), Sakamaki
patent: 2003/0235437 (2003-12-01), Sakamaki
patent: 2002-365916 (2002-12-01), None
patent: 2004-85629 (2004-03-01), None
patent: 2004085629 (2004-03-01), None

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