Image forming apparatus

Details Image forming apparatus Image forming apparatus

2005-07-26

2005-07-26

Tran, Hoan (Department: 2852)

Electrophotography

Image formation

Transfer

C399S066000, C399S308000

Reexamination Certificate

active

06922542

ABSTRACT:
An image forming apparatus in which respective color visible images on tandem-arrayed plural photoconductor drums are sequentially overlay-transferred onto an intermediate transfer belt by application of a primary transfer voltage by intermediate transfer rollers, then the images are transferred at a time from the belt onto a print sheet by application of a secondary transfer voltage by a paper transfer roller. The same primary transfer voltage is applied to the respective color intermediate transfer rollers from one power source. In the intermediate transfer belt, a relative dielectric constant, a surface resistance and a volume resistance are controlled such that potential charged by initial transfer is attenuated to ⅓ or lower than the transfer voltage before a belt position of the initial transfer arrives at a next transfer position.

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patent: 6324359 (2001-11-01), Nakane
patent: 6829450 (2004-12-01), Tamiya et al.
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patent: 6-289686 (1994-10-01), None
patent: 9-34269 (1997-02-01), None
patent: 11-24433 (1999-01-01), None

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