Patent ID: 7274884

Claim:
An image forming apparatus to which a process cartridge is mountable and which is operable to form images at a first image formation speed and a second image forming speed, wherein the process cartridge includes a process device and a memory medium configured to store information relating to image forming conditions of the process device, said image forming apparatus comprising: a calculation portion configured calculate a use amount of the process cartridge; a control unit configured to set the image forming conditions of the process device based on the use amount of the process cartridge and information stored in the memory medium, wherein the memory medium has a first memory area configured to store first information relating to image forming conditions of the process device corresponding to the first image formation speed and a second memory area configured to store second information relating to image forming conditions of the process device corresponding to the second image formation speed, wherein when said image forming apparatus operates at the first image formation speed, and an amount of use of said process cartridge reaches a predetermined threshold value, said control unit sets image forming conditions of the process device to first image conditions on the basis of the first information stored in the first memory area of the memory medium, and wherein when said image forming apparatus operates at the second image formation speed, and an amount of use of said process cartridge reaches the predetermined threshold value, said control unit sets image forming conditions of the process device to second image conditions different from the first image conditions on the basis of the second information stored in the second memory area of the memory medium.