Developing device and image forming apparatus
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United States of America Patent
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May 28, 2013
Grant Date -
Aug 4, 2011
app pub date -
Jan 21, 2011
filing date -
Feb 3, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A developing device and an image forming apparatus which suppress unevenness of image density are provided. A developing device includes a developer tank storing a developer, a first conveying member and a second conveying member conveying the developer, and a developing roller bearing the developer thereon. In the developing device, the first conveying member is constituted by a first rotating shaft and a plurality of first conveying blades provided along a first imaginary spiral surrounding the outer periphery of the first rotating shaft and advancing in the axial direction of the first rotating shaft at a predetermined lead angle θX. The individual first conveying blades are separated from each other in the axial direction and are provided along the portion of less than one cycle of the first imaginary spiral.
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