Image forming apparatus
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United States of America Patent
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-
Dec 27, 2016
Grant Date -
May 5, 2016
app pub date -
Oct 29, 2015
filing date -
Oct 31, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An image forming apparatus includes a belt, a plurality of image forming devices including a photosensitive member, a developing device, a transfer device and a blade, and a control device configured to form a pattern image on a first photosensitive member, when an image to be printed on a sheet is not formed, by applying a developing voltage to a first developing device, an absolute value thereof is greater than that when an image to be printed on a sheet is formed, transfer the pattern image onto the belt and apply a transfer voltage or transfer current having the same polarity as that applied to a second transfer device when an image to be printed on a sheet is formed to the second transfer device when the pattern image to be conveyed by the belt passes the second transfer device.
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