US 11,988,975 B2
Image forming apparatus
Yasushi Takeuchi, Ibaraki (JP); Yukari Shibuya, Saitama (JP); and Tatsuya Inoue, Ibaraki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 15, 2022, as Appl. No. 17/888,020.
Claims priority of application No. 2021-132482 (JP), filed on Aug. 16, 2021.
Prior Publication US 2023/0066316 A1, Mar. 2, 2023
Int. Cl. G03G 15/02 (2006.01); G03G 21/00 (2006.01)
CPC G03G 15/0258 (2013.01) [G03G 21/0023 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a rotatable photosensitive member;
a charging member configured to electrically charge said photosensitive member;
a developing device including a developer carrying member for carrying a developer and configured to develop a latent image formed on said photosensitive member;
a blade configured to clean said photosensitive member;
a detecting portion configured to detect information correlating with a driving torque of said photosensitive member; and
a controller configured to execute, on the basis of a detection result of said detecting portion, a predetermined operation in which during execution of continuous image formation for continuously forming images on a plurality of recording materials, the image formation is interrupted and an interval between consecutive recording materials is increased, and then said photosensitive member is rotated,
wherein said controller causes said photosensitive member to rotate through one full circumference or more on the following conditions during the predetermined operation:
(i) a voltage which is a discharge start voltage or higher is applied to said charging member, and
(ii) an operation condition of said developing device is a first condition, and
wherein in the first condition, an amount of fog toner deposited from said developer carrying member on said photosensitive member is less than an amount of the fog toner in a second condition which is an operation condition of said developing device during a sheet interval step before the image formation during the continuous image formation is interrupted.