Electrophotography – Image formation – Development
Reexamination Certificate
2006-10-23
2010-06-15
Royer, William J (Department: 2852)
Electrophotography
Image formation
Development
C399S270000, C399S272000, C399S273000
Reexamination Certificate
active
07738814
ABSTRACT:
A development apparatus and an image forming apparatus capable of minimizing deterioration of a carrier for a long time, even in a case of continuous formation of images of a smaller image area ratio. The charging of toner is assisted by using a developer composed of a mixture of toner and the carrier, to the surface of which is added a reverse polarity particle having a polarity reverse to that of a charged toner. Separation of the toner or reverse polarity particle of the developer prior to a process of development prevents the reverse polarity particle from being consumed in a developing area, whereby an effect thereof is maintained for a long time.
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Hirayama Junya
Maeyama Takeshi
Matsuura Masahiko
Natsuhara Toshiya
Uetake Shigeo
Brinks Hofer Gilson & Lione
Konica Minolta Business Technologies Inc.
Royer William J
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