Patent ID: 8254798

Claim:
An image forming apparatus comprising: a cartridge attachment portion to which a toner cartridge configured to accommodate toner is removably attached, the toner cartridge comprising a cartridge mechanism unit which is mechanically driven and a storage medium for storing torque information including information indicating torque used for mechanically driving the cartridge mechanism unit; an image forming unit configured to print an image on a surface of a printing medium using toner accommodated in the toner cartridge; a reading unit configured to read the torque information from the toner cartridge attached to the cartridge attachment portion; and a control unit configured to determine a number of printing media to be printed by the image forming unit per unit time, according to the torque information read by the reading unit, count a number of printing media which have been continuously output and decrease the number of printing media per unit time when a counted number of continuous outputs exceeds a number of allowable continuous prints which is set as a number of allowable continuous outputs.