US 12,372,912 B2
Image forming apparatus with fiber brush
Shuichi Tetsuno, Kanagawa (JP); and Toshihiko Takayama, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 28, 2024, as Appl. No. 18/675,332.
Application 18/675,332 is a division of application No. 18/230,813, filed on Aug. 7, 2023, granted, now 12,025,944.
Application 18/230,813 is a division of application No. 18/092,589, filed on Jan. 3, 2023, granted, now 11,782,377, issued on Oct. 10, 2023.
Claims priority of application No. 2022-002365 (JP), filed on Jan. 11, 2022.
Prior Publication US 2024/0310774 A1, Sep. 19, 2024
Int. Cl. G03G 21/00 (2006.01); G03G 21/16 (2006.01)
CPC G03G 21/0035 (2013.01) [G03G 21/169 (2013.01); G03G 2221/0005 (2013.01); G03G 2221/0089 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a rotatable image bearing member;
a developing member configured to develop an electrostatic latent image formed on the image bearing member using a developer at a developing portion;
a transfer member configured to transfer a developer image developed by the developing member from the image bearing member to a transferred member at a transfer portion; and
a brush provided with a plurality of fibers contacting the image bearing member at a position of downstream of the transfer portion and upstream of the developing portion with respect to a rotational direction of the image bearing member,
wherein the developer remaining on the surface of the image bearing member is collected in the developing portion,
wherein a contacting pressure expressed as a product of an average contacting pressure per one fiber in the circumference of 100 μm in diameter and an average number is equal to or more than 1.9 nN, and
wherein a density of the fibers of the brush is equal to or more than 120 kF/inch2.