US 12,066,783 B2
Image forming apparatus
Junichi Moteki, Chiba (JP); Takuma Tadomi, Ibaraki (JP); and Kohei Aoki, Chiba (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 4, 2022, as Appl. No. 17/980,640.
Claims priority of application No. 2021-184628 (JP), filed on Nov. 12, 2021.
Prior Publication US 2023/0152743 A1, May 18, 2023
Int. Cl. G03G 15/00 (2006.01)
CPC G03G 15/70 (2013.01) 13 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a transfer portion configured to transfer a toner image onto a recording material;
a first rotary member that is rotatable and includes a heat source;
a second rotary member configured to form a nip portion by being in contact with an outer peripheral surface of the first rotary member, the second rotary member being configured to fix the toner image by applying heat and pressure while nipping and conveying the recording material together with the first rotary member;
a contact member, including a contact portion that is contactable with the recording material, disposed downstream of the transfer portion and upstream of the nip portion in a conveyance direction of the recording material, the contact member being configured to be movable among:
a first position where the contact portion is in a conveyance path of the recording material;
a second position where the contact portion retracts from the first position by coming into contact with the recording material as the recording material passes through the conveyance path; and
a third position where the contact portion retracts from the first position further than the second position, in a state where the contact portion receive pressure from the recording material being conveyed through the conveyance path while the contact member is at the second position;
a first sensor configured to detect whether or not the contact member is in the second position;
a second sensor configured to detect whether or not the contact member is in the third position; and
a control unit configured to control a rotational speed of the second rotary member during an image formation based on a detection result of the second sensor.