Electrophotography – Internal machine environment – Particle or contaminant control
Reexamination Certificate
2005-02-15
2005-02-15
Royer, William J. (Department: 2852)
Electrophotography
Internal machine environment
Particle or contaminant control
C399S273000, C399S277000
Reexamination Certificate
active
06856774
ABSTRACT:
A developing device developing a latent image on a latent image carrier with a developer, and including a casing having an opening facing the latent image carrier and a developer carrier. Also included is a magnetic field generating device including a first magnetic pole generating a magnetic field causing the developer to rise on the developer carrier in a form of a magnet brush in a developing region, and a second magnetic pole generating a magnetic field at a downstream side of the first magnetic pole in a rotating direction of the developer carrier. Further, a toner-scattering restraining device is provided on an end portion of the casing at the downstream side of the developing region, and a magnetic member provided on a side of the toner-scattering restraining device facing the latent image carrier. A peak of a magnetic flux density set by the second magnetic pole in its normal direction is located outside of the opening.
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Higuchi Hiroto
Koike Toshio
Kondo Maiko
Ohjimi Tokuya
Ohyama Kunihiro
Ricoh & Company, Ltd.
Royer William J.
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