Patent ID: 9091997
Filing Date: 2015-07-28
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing member configured to bear an electrostatic latent image; a developer bearing member configured to bear a developer on a surface and develop the electrostatic latent image borne by the image bearing member as a toner image; a cleaning blade configured to abut onto the image bearing member and clean the developer remaining on the image bearing member after transfer; a sensing portion configured to sense a rotation load of the image bearing member; and a controller configured to perform control such that a driving mode can be performed to drive the developer bearing member at a lower speed than that during an image forming time when the image bearing member is rotated during non image formation, wherein the controller is enabled to perform a torque sensing mode which determines whether to perform the driving mode or determines a driving speed of the developer bearing member during the driving mode, based on a first dynamic torque of the image bearing member when the developer bearing member is rotated at a first speed and a second dynamic torque of the image bearing member when the developer bearing member is stopped or when the developer bearing member is rotated at a second speed smaller slower than the first speed.