Patent ID: 9405219
Filing Date: 2016-08-02
CPC Classification: G03G

Claim Text:
1. A developing device comprising: a developer carrying member rotatably supported and configured to rotate in a first rotation direction, thereby to carry a two-component developer on a surface thereof, to supply, at a first position, toner included in the two-component developer to a toner carrying member on a next stage, and further to cause the two-component developer carried on the surface to be detached therefrom at a second position on a downstream side in the first rotation direction relative to the first position; a first rotation control portion configured to cause, when a developing process is performed, the developer carrying member to rotate in the first rotation direction at a first rotation speed previously determined; a layer thickness regulating member provided, spaced from the surface of the developer carrying member, at a third position on an upstream side in the first rotation direction relative to the first position on an outer circumference of the developer carrying member, the layer thickness regulating member configured to regulate a thickness of a layer of the two-component developer carried by the developer carrying member rotating in the first rotation direction; and a second rotation control portion configured to, when the developing process is not performed, cause the developer carrying member to rotate at a second rotation speed faster than the first rotation speed in a second rotation direction reverse to the first rotation direction, and further cause the developer carrying member to rotate at a third rotation speed slower than the second rotation speed in the second rotation direction.