US 12,085,880 B2
Image forming apparatus
Ryo Aihara, Chiba (JP); and Hisashi Tsukijima, Ibaraki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 22, 2022, as Appl. No. 18/145,675.
Claims priority of application No. 2022-001577 (JP), filed on Jan. 7, 2022.
Prior Publication US 2023/0221665 A1, Jul. 13, 2023
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2053 (2013.01) 13 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a transfer roller which transfers a toner image to a recording material conveyed in a conveyance direction;
a fixing portion disposed downstream of the transfer roller in the conveyance direction, having a heating unit and a cylindrical rotary member configured to convey the recording material, and configured to fix the toner image to the recording material conveyed from the transfer roller;
a motor which drives the cylindrical rotary member; and
a controller configured to control the motor to control a rotation speed of the cylindrical rotary member,
wherein, in a case in which images are formed on a plurality of recording materials, the controller controls the motor based on a time period from a time when a trailing edge of a preceding recording material passes through the fixing portion to a time when a leading edge of a subsequent recording material passes through the fixing portion so that a second rotation speed of the cylindrical rotary member when the cylindrical rotary member of the fixing portion conveys the subsequent recording material becomes lower than a first rotation speed of the cylindrical rotary member when the cylindrical rotary member of the fixing portion conveys the preceding recording material.