Image forming apparatus for electrophotographic imaging

Electrophotography – Image formation – Transfer

Reexamination Certificate

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Reexamination Certificate

active

08000641

ABSTRACT:
The present invention provides an image forming apparatus comprising at least an image holding member, an charging unit, a latent image forming unit, a developing unit, an intermediate transfer belt, a primary transfer unit, a secondary transfer unit, a fixing unit, and a cleaning unit, wherein a surface hardness of a side, of the intermediate transfer belt, contacting with the image holding member being 10 to 30, a carrier in the developer having at least two resin-coated layers on a surface of a core material containing ferrite, and the core material having a surface roughness Sm of 2.0 μm or less, a surface roughness Ra of 0.1 μm or more, and an average a circularity degree of 0.975 to 1.000.

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patent: 2007/0172748 (2007-07-01), Inoue et al.
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patent: A-2005-099072 (2005-04-01), None
patent: A-2005-115200 (2005-04-01), None
patent: A-2006-038961 (2006-02-01), None
patent: A-2006-330022 (2006-12-01), None
patent: A-2007-199267 (2007-08-01), None

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