| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing device capable of forming an image of high quality over a long period by uniformly sticking fresh toner over the whole of a supplying roller all the times, at the time of sticking toner discharged from a toner supplying port formed in the developing device to a paper feeding roller. SOLUTION: The toner supplied from the toner supplying port 30A is carried to both ends with the spiral tooth 70A of a lower auger 70 and then, to the center with the spiral tooth 71A of an upper auger 71. The movement of the toner between both augers 70 and 71 is cut off except both end parts by an auger partition plate 72 arranged between both augers 70 and 71. A part of the toner reaching the center by carrying is returned to a toner cartridge through the toner supplying port 30A and a part of the remainder passes through a notched part provided in the central part of the auger partition plate 72, to be recirculated. |
