Image forming apparatus
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United States of America Patent
Stats
-
Sep 27, 2016
Grant Date -
Aug 13, 2015
app pub date -
Feb 3, 2015
filing date -
Feb 12, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A developing device includes a developing member and a carrier collecting member. An outer surface of the developing member includes a plurality of protrusion portions aligned at regular intervals that are equal to or larger than an average particle diameter of toner particles and smaller than an average particle diameter of magnetic carrier particles. Each protrusion portion has a first face formed at one side of an apex of each protrusion portion and a second face formed at the other side of the apex, and an inclination angle of the first face is less than an inclination angle of the second face. In the circumferential direction of the developing member, when a downward direction of the first face is set to be positive, a relative velocity of a surface velocity of an image bearing member to a surface velocity of the developing member is set to be positive.
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Cited Art Landscape
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