Electrophotography – Supplemental electrophotographic process – Exposure or charging
Reexamination Certificate
2008-08-06
2011-10-11
Gray, David (Department: 2852)
Electrophotography
Supplemental electrophotographic process
Exposure or charging
C399S343000, C399S345000
Reexamination Certificate
active
08036573
ABSTRACT:
An image forming apparatus includes an image carrying member, an image writing unit, a development unit, a transfer device, a charging device, and a toner charge control device. The image writing unit forms a latent image on the image carrying member, which is developed as a toner image by the development unit, and the toner image is transferred to a transfer member by the transfer device. The charging device charges the image carrying member and toner on the image carrying member. The toner charge control device, controls a polarity of charge and charging voltage level of toner remaining on the image carrying member. The toner charge control device includes an endless belt having a surface made of a conductive material, a support member extending the endless belt pressed against the image carrying member, and a bias voltage applicator for supplying a voltage to the surface of the endless belt.
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Fujita Tetsumaru
Nakatake Naoki
Shono Hidekazu
Gray David
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh & Company, Ltd.
Yi Roy Y
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