US 12,169,378 B2
Fixing device and image forming apparatus
Shutaro Saito, Tokyo (JP); and Takeshi Kozuma, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 19, 2023, as Appl. No. 18/470,209.
Application 18/470,209 is a continuation of application No. 17/851,855, filed on Jun. 28, 2022, granted, now 11,796,943.
Claims priority of application No. 2021-108166 (JP), filed on Jun. 29, 2021.
Prior Publication US 2024/0004332 A1, Jan. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2053 (2013.01) [G03G 15/2064 (2013.01); G03G 2215/2032 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A fixing device comprising:
a fixing belt that is endless and configured to rotate;
a heating roller configured to abut an inner peripheral surface of the fixing belt and apply heat to the fixing belt;
a steering roller configured to abut the inner peripheral surface of the fixing belt together with the heating roller;
a pressurization rotating member configured to pressurize the fixing belt, wherein the pressurization rotating member and the fixing belt form a fixing nip portion and, in a case where a toner bearing recording material bearing unfixed toner is nipped and conveyed to the fixing nip portion, an unfixed toner image is fixed to the toner bearing recording material;
a belt position detection unit configured to detect a position of the fixing belt in a width direction of the fixing belt; and
a control unit configured to control, based on a detection result of the belt position detection unit, the steering roller to swing to move the fixing belt to a prescribed position in the width direction,
wherein, in a case where a first recording material having a length greater than or equal to a predetermined length in a conveying direction of the first recording material is conveyed to the fixing nip portion, a maximum inclination angle of the steering roller is smaller than the maximum inclination angle of the steering roller in a case where a second recording material having a length less than the predetermined length in the conveying direction is conveyed to the fixing nip portion.