Image forming apparatus

Details Image forming apparatus Image forming apparatus

2007-05-16

2009-12-29

Lee, Susan S (Department: 2852)

Electrophotography

Image formation

Transfer

Reexamination Certificate

active

07639976

ABSTRACT:
An image forming apparatus includes an image carrier that carries toner images, and an intermediate transfer member onto which the toner images are primarily transferred, sequentially from a first toner image, from the image carrier. A primary transfer bias applied upon primary transfer of the first toner image is higher than a primary transfer bias applied upon primary transfer of other toner images. The intermediate transfer member has a surface potential attenuation ratio such that residual potential of the intermediate transfer member applied with a voltage of 500 volts becomes equal to or lower than 250 volts after five seconds.

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U.S. Appl. No. 12/119,050, filed May 12, 2008, Muto et al.

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