Patent ID: 11960232
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus comprising:
a rotatable photosensitive member;
a charging member configured to electrically charge a surface of the photosensitive member at a charging portion;
a developing device configured to supply toner to the surface of the electrically charged photosensitive member to form a toner image;
a transfer member configured to transfer the toner image from the photosensitive member to a recording material at a transfer portion;
a brush contacting the surface of the photosensitive member downstream of the transfer portion and upstream of the charging portion with respect to a rotational direction of the photosensitive member and configured to form a contacting portion;
a driving source configured to rotatably drive the photosensitive member; and
a control portion configured to control the driving source to execute an image forming process in which image formation on the recording material is executed and a non-image-forming process in which the photosensitive member is driven to rotate other than in the image forming process,
wherein the non-image-forming process between a first recording material and a second recording material on which the image formation is executed following the first recording material is defined as a first non-image-forming process, and the non-image-forming process between the second recording material and a third recording material on which image formation is executed following the second recording material is defined as a second non-image-forming process, and
wherein the control portion determines a time of the second non-image-forming process based on history information correlating with a usage amount of the photosensitive member and a time of the first non-image-forming process.