US 12,455,531 B2
Image forming apparatus including a transferer that reduces variations in transfer pressure between a transfer roller and image bearer during opening and closing of a cover of the image forming apparatus
Yuuji Meguro, Kanagawa (JP); Masaharu Furuya, Kanagawa (JP); and Shogo Kezuka, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Yuuji Meguro, Kanagawa (JP); Masaharu Furuya, Kanagawa (JP); and Shogo Kezuka, Kanagawa (JP)
Filed on Jun. 7, 2024, as Appl. No. 18/737,346.
Claims priority of application No. 2023-096303 (JP), filed on Jun. 12, 2023.
Prior Publication US 2024/0411264 A1, Dec. 12, 2024
Int. Cl. G03G 21/16 (2006.01); G03G 15/00 (2006.01)
CPC G03G 21/168 (2013.01) [G03G 15/6558 (2013.01); G03G 21/1633 (2013.01); G03G 21/1638 (2013.01); G03G 21/1647 (2013.01); G03G 2215/00409 (2013.01); G03G 2215/1614 (2013.01); G03G 2221/1642 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a body;
a cover openably attached to the body;
an image bearer;
a transferer attachable to the cover, the transferer including:
a transfer roller facing the image bearer and configured to displace between,
a contact position at which the transfer roller comes into contact with the image bearer; or
a separated position at which the transfer roller is separated from the image bearer;
a holder configured to rotatably hold the transfer roller; and
a biasing member configured to bias the transfer roller toward the image bearer to the contact position;
a support shaft configured to swingably support the holder; and
a pressure receiver configured to receive the holder, wherein
the holder has a first curved face coaxial with the support shaft on an outer face of the holder closer to the support shaft than the transfer roller,
the pressure receiver has a second curved face having a curvature identical to the first curved face of the holder, and
the first curved face of the holder contacts the second curved face of the pressure receiver.