| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus that can properly use a developer up to its appropriate deterioration state according to an initial capacity of a cartridge. <P>SOLUTION: The image forming apparatus has an agitator 70 configured to rotate to agitate toner T, and is configured to detachably mount therein a plurality of types of developing cartridges 5B having different initial capacities of the toner T and configured to optically detect an amount of the toner T in the developing cartridge 5B. The image forming apparatus includes a light-emitting device 81, a light-receiving device 82, a determining part 110 configured to determine a replacement time of the developing cartridge 5B on the basis of a light-receiving signal of the light-receiving device 82, and a speed changing part 120 configured to change a rotating speed of the agitator 70 in accordance with the initial capacity of the developing cartridge 5B at least when the replacement time of the developing cartridge 5B is determined. The speed changing part 120 changes the rotating speed of the agitator 70 such that the rotating speed of the agitator 70 of the developing cartridge 5B is relatively higher as the initial capacity of the developing cartridge 5B is smaller. <P>COPYRIGHT: (C)2010,JPO&INPIT |
