| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the deterioration of image quality by accurately detecting the exchange time of developer. <P>SOLUTION: The image forming apparatus is equipped with a 1st unit including a developer container in which the developer including toner and carrier is stored, and a developer carrier on which the developer stored in the developer container is carried to be fed, and a 2nd unit supplying the toner to the developer container, and has a processing unit deciding the exchange time of the 1st unit from information related to toner supply amount from the 2nd unit or information related to the action amount of the developer carrier. <P>COPYRIGHT: (C)2004,JPO |
