US 12,085,891 B2
Process cartridge having drum cartridge and developing cartridge including first and second electrical contact surfaces
Koji Abe, Okazaki (JP); and Naoya Kamimura, Ichinomiya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on May 12, 2023, as Appl. No. 18/316,583.
Application 18/316,583 is a continuation of application No. 17/716,552, filed on Apr. 8, 2022, granted, now 11,687,030.
Application 17/716,552 is a continuation of application No. 17/105,723, filed on Nov. 27, 2020, granted, now 11,300,922, issued on Apr. 12, 2022.
Application 17/105,723 is a continuation of application No. 16/560,333, filed on Sep. 4, 2019, granted, now 10,859,972, issued on Dec. 8, 2020.
Application 16/560,333 is a continuation of application No. PCT/JP2017/023028, filed on Jun. 22, 2017.
Claims priority of application No. 2017-042646 (JP), filed on Mar. 7, 2017.
Prior Publication US 2023/0280690 A1, Sep. 7, 2023
Int. Cl. G03G 21/00 (2006.01); G03G 21/18 (2006.01)
CPC G03G 21/1885 (2013.01) [G03G 21/1867 (2013.01); G03G 21/1878 (2013.01); G03G 2221/1823 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process cartridge comprising:
a drum cartridge including:
a drum frame having a first end portion and a second end portion spaced apart from the first end portion in a first direction, the drum frame having a third end portion and a fourth end portion spaced apart from the third end portion in a second direction;
a photosensitive drum rotatable about a first axis extending in the second direction, the photosensitive drum being positioned at the first end portion of the drum frame; and
a first storage medium including a first electrical contact surface; and
a developing cartridge detachably attachable to the drum frame, the developing cartridge including:
a developing roller rotatable about a second axis extending in the second direction; and
a second storage medium including a second electrical contact surface,
wherein the first electrical contact surface is positioned closer to the second end portion of the drum frame than the photosensitive drum is to the second end portion of the drum frame in the first direction, and
wherein, in a state where the developing cartridge is attached to the drum cartridge, the second electrical contact surface is positioned closer to the second end portion of the drum frame than the photosensitive drum is to the second end portion of the drum frame in the first direction.