Developing device and image forming apparatus
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United States of America Patent
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-
Feb 2, 2016
Grant Date -
Feb 26, 2015
app pub date -
Aug 20, 2014
filing date -
Aug 23, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A developing device includes a developer bearing member that bears a developer on its surface to supply the developer to an image bearing member having a first dielectric portion and a second dielectric portion in its surface, a regulating member that regulates a thickness of a layer of the developer carried by the developer bearing member, and a flexible sheet-like charging auxiliary member disposed so as to be in contact with the developer bearing member at a position downstream of a contact portion between the developer bearing member and the image bearing member and upstream of a contact portion between the developer bearing member and the regulating member in a rotational direction of the developer bearing member, where the charging auxiliary member charges the developer carried by the developer bearing member. In a triboelectric series, the charging auxiliary member is positioned between the first and second dielectric portions.
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