US 12,436,489 B2
Image forming apparatus including controller capable of determining whether developing cartridge, drum cartridge and belt unit are reached their lifetimes
Tadao Kyotani, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Oct. 18, 2023, as Appl. No. 18/489,100.
Application 18/489,100 is a continuation of application No. 17/486,348, filed on Sep. 27, 2021, granted, now 11,835,904.
Application 17/486,348 is a continuation of application No. PCT/JP2019/042791, filed on Oct. 31, 2019.
Claims priority of application No. 2019-063075 (JP), filed on Mar. 28, 2019.
Prior Publication US 2024/0045362 A1, Feb. 8, 2024
Int. Cl. G03G 15/08 (2006.01); G03G 15/00 (2006.01); G03G 21/18 (2006.01)
CPC G03G 15/553 (2013.01) [G03G 15/0863 (2013.01); G03G 15/556 (2013.01); G03G 21/1875 (2013.01); G03G 21/1889 (2013.01); G03G 2215/0697 (2013.01); G03G 2221/1823 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A developing cartridge comprising:
a developing roller; and
a developing memory having:
a developing storage area storing therein a developing identification information which identifies a specific type of the developing cartridge, the developing storage area being configured to store therein a developing roller rotation number corresponding to a number of times the developing roller rotates when printing is performed, and a dot count corresponding to a number of dots printed,
wherein whether the developing cartridge is reached a lifetime is determinable, at least in part, on a basis of:
the developing roller rotation number and a maximum developing roller rotation number which corresponds to the developing identification information; and
the dot count and a maximum dot count which corresponds to the developing identification information.