| 摘要 |
PURPOSE:To prevent an undesirable condition where a newly supplied developing agent is not mixed with an already existing developing agent and to be directly used for layer thickness control and to improve the quality of a picture, by providing a partitioning member to a developing agent supplying member. CONSTITUTION:A partitioning member 6 is provided in a hopper 2 for storing a developing agent in such a way that the member 6 is contacted with the upstream side peripheral surface of the contacting section C of a front toner supplying roller 5 and the member 6 prevents an undesirable condition where a newly supplied toner dropped from a toner cartridge 3 onto the receiving section 2b of the hopper 2 is directly supplied to the upstream side location U of a doctor blade 7 on a developing sleeve 1 without passing through the toner supplying roller 5. The partitioning member 6 is formed of a fluorine- containing material which is excellent in noncohesiveness so as to prevent adhesion of toner to the member 6. Therefore, an appropriate quantity of toner can be supplied onto the developing sleeve 1 by previously controlling the layer thickness of toner carried by the rotation of the roller 5 to a uniform thickness. |
