Patent ID: 11899388
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus comprising:
a main body;
a development cartridge installable in the main body, the development cartridge comprising a development roller, a development chamber in which toner is storable, and a development memory;
a toner cartridge installable in the development cartridge, the toner cartridge comprising a case in which toner is stored, a toner supply unit configured to supply toner from the case into the development chamber, and a toner memory; and
a controller configured to:
store, in the development memory, information regarding a cumulative received toner amount that is a cumulative amount of toner supplied from the case and received in the development chamber, and a cumulative toner consumption amount that is a cumulative amount of consumed toner;
subtract the cumulative toner consumption amount from the cumulative received toner amount to find a difference, and cause the toner supply unit to supply a first predetermined amount of toner into the development chamber when the difference is equal to or smaller than a first threshold value; and
store, in the toner memory, information regarding a cumulative supplied toner amount that is a cumulative amount of toner supplied by the toner supply unit from the case into the development chamber.