US 12,228,878 B2
Drum cartridge and developing cartridge capable of suppressing variation in position of electrical contact surface
Takashi Shimizu, Nagoya (JP); and Koji Abe, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Aichi (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Jun. 16, 2023, as Appl. No. 18/336,666.
Application 18/336,666 is a continuation of application No. 17/737,125, filed on May 5, 2022, granted, now 11,899,392.
Application 17/737,125 is a continuation of application No. 17/395,560, filed on Aug. 6, 2021, granted, now 11,422,501, issued on Aug. 23, 2022.
Application 17/395,560 is a continuation of application No. 16/692,602, filed on Nov. 22, 2019, granted, now 11,112,747, issued on Sep. 7, 2021.
Application 16/692,602 is a continuation of application No. 16/438,882, filed on Jun. 12, 2019, granted, now 10,514,655, issued on Dec. 24, 2019.
Application 16/438,882 is a continuation of application No. 16/168,974, filed on Oct. 24, 2018, granted, now 10,338,520, issued on Jul. 2, 2019.
Application 16/168,974 is a continuation of application No. 15/472,014, filed on Mar. 28, 2017, granted, now 10,126,704, issued on Nov. 13, 2018.
Claims priority of application No. 2016-202959 (JP), filed on Oct. 14, 2016; and application No. 2016-249651 (JP), filed on Dec. 22, 2016.
Prior Publication US 2023/0333509 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 21/18 (2006.01); G03G 15/08 (2006.01)
CPC G03G 21/1814 (2013.01) [G03G 15/0863 (2013.01); G03G 15/0865 (2013.01); G03G 21/1825 (2013.01); G03G 2215/0697 (2013.01); G03G 2215/085 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A developing cartridge comprising:
a casing configured to accommodate toner therein, the casing including a plurality of ribs, the plurality of ribs being positioned at a lower surface of the casing;
a developing roller rotatable about a developing roller axis extending in a first direction, the developing roller being positioned at a rear side of the casing; and
a storage medium having an electrical contact surface, the electrical contact surface being positioned at one side of the casing in the first direction,
wherein the plurality of ribs are positioned closer to another side of the casing in the first direction than the electrical contact surface of the storage medium is to the another side of the casing in the first direction.