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

Claim 10:
11. 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; and
a control portion configured to control a time of non-image-formation which is a time when the photosensitive member is rotating in a period from when a preceding recording material passes through the transfer portion until a succeeding recording material reaches the transfer portion,
wherein an inter-image time is a time of non-image-formation from when the preceding recording material passes through the transfer portion until the succeeding recording material reaches the transfer portion without stopping rotation of the photosensitive member, and
wherein the control portion controls to change the time of the non-image-formation from when a last recording material in consecutive image formation, in which the toner image is consecutively transferred to a plurality of recording materials passes through the transfer portion until a succeeding recording material succeeding the last recording material reaches the transfer portion based on history information correlating with a usage amount of the photosensitive member during the consecutive image formation.