| 摘要 |
An image-forming apparatus includes a mechanism that controls the replenishment amount of toner to a predetermined value. A toner cartridge holds toner therein. The toner cartridge is detachably attached to a process cartridge. The process cartridge has a toner reservoir that holds the toner supplied from the toner cartridge, a photoconductive drum and a developing roller that supplies the toner to the photoconductive drum. A valve is located between the toner cartridge and the process cartridge and supplies the toner from the toner cartridge to the process cartridge. When the valve rotates, the valve supplies a volume of toner in such a way that the toner in the toner reservoir fills a volume not more than a predetermined fraction of a maximum capacity of the toner reservoir.
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