| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device capable of maintaining a stable image density from an initial stage of driving of the developing device. <P>SOLUTION: In the developing device including a developing unit and a toner cartridge wherein toner to be supplied to the developing unit is stored, the cartridge can be loaded to and unloaded from the developing device and is replaceable, and toner charged in the first toner cartridge first loaded to the developing device has an average particle size larger than that of toner charged in the second and following toner cartridges. <P>COPYRIGHT: (C)2008,JPO&INPIT |
