Image forming apparatus that performs charge elimination...

Details Image forming apparatus that performs charge elimination... Image forming apparatus that performs charge elimination...

2006-11-17

2009-12-29

Brase, Sandra L (Department: 2852)

Electrophotography

Image formation

Transfer

C399S044000

Reexamination Certificate

active

07639977

ABSTRACT:
An image forming apparatus is operable to form an image on a recording medium. An image carrier is adapted such that a toner image is formed thereon by developing an electrostatic latent image. An intermediate transfer member is adapted such that the toner image is primarily transferred thereto. In a transfer device, a roller member is adapted to come in contact with the intermediate transfer member. A first bias voltage applier is operable to provide a transfer voltage, thereby applying a first bias voltage between the roller member and the intermediate transfer member to secondarily transfer the toner image onto the recording medium in order to obtain the image. A charge eliminator is disposed in the vicinity of the roller member. A second bias voltage applier is operable to apply a second bias voltage to the charge eliminator to eliminate charges on the recording medium which has been subjected to the application of the first bias voltage. A controller is operable to vary the second bias voltage in accordance with a deviation amount of the first bias voltage.

REFERENCES:
patent: 4521103 (1985-06-01), Ohtsuka et al.
patent: 4912515 (1990-03-01), Amemiya et al.
patent: 5890030 (1999-03-01), Namekata et al.
patent: 6337968 (2002-01-01), Hayashida
patent: 7099598 (2006-08-01), Dougherty et al.
patent: 2004/0170453 (2004-09-01), Ito et al.

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