US 12,242,220 B2
Image forming apparatus with a memory positioned on a drum frame
Junichi Yokoi, Nagoya (JP); and Nao Itabashi, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Nov. 6, 2023, as Appl. No. 18/502,208.
Application 18/502,208 is a continuation of application No. 17/686,582, filed on Mar. 4, 2022, granted, now 11,853,000.
Application 17/686,582 is a continuation of application No. 17/176,259, filed on Feb. 16, 2021, granted, now 11,294,325, issued on Apr. 5, 2022.
Application 17/176,259 is a continuation of application No. 16/788,878, filed on Feb. 12, 2020, granted, now 10,935,925, issued on Mar. 2, 2021.
Claims priority of application No. 2019-065282 (JP), filed on Mar. 29, 2019.
Prior Publication US 2024/0142911 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 21/16 (2006.01)
CPC G03G 21/1647 (2013.01) [G03G 21/1671 (2013.01); G03G 21/1676 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A drum cartridge removably insertable into a main body casing included in an image forming apparatus through a first opening of the main body casing in a first direction, the drum cartridge being for use with a developing cartridge removably insertable into the main body casing thorough the first opening in the first direction, the drum cartridge comprising:
a photosensitive drum rotatable about a first axis extending in the first direction;
a drum frame rotatably supporting the photosensitive drum, the drum flame having:
a first end;
a second end apart from the first end in an up-down direction;
a lower end surface positioned at the second end;
a first drum outer surface; and
a second drum outer surface apart from the first drum outer surface in the first direction, the second drum outer surface being positioned farther from the first opening than the first drum outer surface in the first direction in a state where the drum cartridge is attached to the main body casing; and
a memory configured to store drum cartridge information, the memory being positioned at the lower end surface and positioned closer to the second drum outer surface than the first drum outer surface in the first direction.