US 12,228,864 B2
Charging device, cartridge, and image forming apparatus
Yuki Tagawa, Kanagawa (JP); Fuyuki Kano, Kanagawa (JP); and Takuya Yamamoto, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Aug. 8, 2023, as Appl. No. 18/446,179.
Claims priority of application No. 2023-015412 (JP), filed on Feb. 3, 2023.
Prior Publication US 2024/0264548 A1, Aug. 8, 2024
Int. Cl. G03G 15/02 (2006.01)
CPC G03G 15/0225 (2013.01) [G03G 15/0233 (2013.01); G03G 2215/022 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A charging device comprising:
a charging member configured to rotate in contact with a charged body and to charge the charged body; and
a cleaning member configured to contact the charging member and to rotate in conjunction with the charging member,
wherein the cleaning member includes a foam elastic layer in which a band-shaped foam elastic member is spirally disposed with a pitch, and a diameter of a tip end portion of a cell skeleton protruding to a surface of the foam elastic layer is 50 μm or less, and
wherein a peripheral speed ratio of the cleaning member to the charging member is 0.3 or more and 0.7 or less.