| 摘要 |
A developing device is provided with a supporting device for removably and rotatably supporting a toner cartridge containing a toner therein and having a toner supplying opening portion and toner discharge device for discharging the toner in the toner cartridge through the opening portion, driving device for driving the toner discharge device, and cut-off device for cutting off the drive transmission of the driving device during the rotation of the toner cartridge. |
