Charging member and image forming apparatus
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United States of America Patent
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Mar 24, 2015
Grant Date -
Jul 4, 2013
app pub date -
Dec 5, 2011
filing date -
Dec 14, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A blade-like charging member comprises a charging portion, a non-charging portion, and an electrode portion. The non-charging portion is capable of contacting the image bearing member while maintaining an electrically dischargeable gap therebetween. To prevent electric discharge between the non-charging portion and the surface of the image bearing member, at least part of the non-charging portion is made of material having a higher resistance than that of the charging portion. The non-charging portion contacts and slides on the surface of the image bearing member over a range that exceeds the length of the charging portion. A shortest distance between the discharge position and an end portion of the electrode portion with respect to a longitudinal direction of the image bearing member is longer than a shortest distance between the discharge position and a central portion of the electrode portion with respect to the longitudinal direction of the image bearing member.
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