| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of uniformly electrifying a developer layer on the developer carrier, making the layer thickness definite, dispensing with a sealing member for sealing a gap in between a developing unit wall and the developer carrier, and making its constitution simplified even if it is disposed therein. SOLUTION: This device is provided with toner feeding rotary rollers 4a and 4b in a rotary type for feeding the toner to a developing roller 2, on the upper part and the lower part corresponding to a position where the developing roller 2 is located, while held in contact with the roller 2 on a position of the toner hopper 6 side from the developing roller 2. In the same time of the above, the respective rotary direction of the feeding rollers 4a and 4b, is set so as to become mutually opposite direction, so as to shift the toner lying in between the feeding rollers 4a and 4b, from the toner hopper 6 side to the developing roller 2 side. |
