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US 7,734,235 B2Granted
Image forming apparatus including a metallic driving roller
AssigneeRicoh Company, Ltd.
InventorsAtsushi Takehara, Akihiro Kawasaki, Yoshie Iwakura, Tomoya Adachi, Takafumi Miyazaki
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Abstract
In an image forming apparatus, an intermediate transfer belt is made of a resin film and is supported by a plurality of rollers. A driving roller that is one of the plurality of rollers, drives the intermediate transfer belt, and also functions as an opposing unit with respect to a secondary transfer roller. The driving roller is made of metal, and applies a bias to at least secondary transfer units, at least at a time of performing primary transfer to a plurality of image bearing bodies.
Claims11
An image forming apparatus, comprising:
- a plurality of image bearing bodies;
- a secondary transfer roller;
- an intermediate transfer belt made of a resin film and supported by a plurality of rollers;
- and
- a driving roller that is one of the plurality of rollers, drives the intermediate transfer belt, and that forms a roller pair with the secondary transfer roller, wherein
- the driving roller is made of metal, and the driving roller applies a bias to at least the secondary transfer roller at least at a time that a primary transfer of an image via the image bearing bodies is performed.
3 more elements
Dependencies are inferred from the claim text.