US 11,809,113 B2
Drum cartridge for use with a toner cartridge in an image forming apparatus
Tadao Kyotani, Nagoya (JP); and Chieko Mimura, Nagoya (JP)
Assigned to Brother Kogyo Kabushiki Kaisha, Nagoya (JP)
Filed by Brother Kogyo Kabushiki Kaisha, Nagoya (JP)
Filed on Jun. 23, 2021, as Appl. No. 17/355,551.
Application 17/355,551 is a continuation of application No. 17/010,954, filed on Sep. 3, 2020, granted, now 11,092,920.
Claims priority of application No. 2019-178770 (JP), filed on Sep. 30, 2019; application No. 2019-178771 (JP), filed on Sep. 30, 2019; and application No. 2019-178772 (JP), filed on Sep. 30, 2019.
Prior Publication US 2021/0318649 A1, Oct. 14, 2021
Int. Cl. G03G 15/00 (2006.01); G03G 15/02 (2006.01); G03G 21/20 (2006.01); G03G 21/16 (2006.01)
CPC G03G 15/5012 (2013.01) [G03G 15/0266 (2013.01); G03G 15/5016 (2013.01); G03G 15/55 (2013.01); G03G 21/1633 (2013.01); G03G 21/206 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a toner cartridge accommodating toner;
a drum cartridge for use with the toner cartridge, the drum cartridge comprising
a photosensitive drum, and
a drum memory storing a life count value representing at least one of a cumulative number of rotations of the photosensitive drum, a cumulative number of sheets printed using the photosensitive drum, and a cumulative number of dots printed using the photosensitive drum, the drum memory being further configured to store history information relating to an abnormal state of the drum cartridge, the history information being different from the life count value; and
a controller configured such that when the controller detects an occurrence of an error relating to the abnormal state of the drum cartridge, the controller writes on the drum memory information indicating that the error relating to the abnormal state occurred,
wherein use of the drum cartridge is not permitted in response to determining that the history information relating to the abnormal state of the drum cartridge is stored in the drum memory and determining life of the drum based on the life count value.