| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily agitate developer on a developer feeding member, and to control toner concentration the toner charge amount in the two component developer with a simple constitution, in the case of equipping a developing member capable of shifting the toner to an electrostatic latent image of visualizing, and the developer feeding member capable of transporting by magnetically attracting the two component developer onto the peripheral surface, and feeding the two component developer or the toner to the above developing member. SOLUTION: The two component developer 109 to which toner is fed by the developer feeding member 103, is circulated to the upstream side in the transporting direction, wlthin a range where the attracting force by a magnetic pole of the inside member 103b of the developer feeding member 103 acts. This circulation is performed by letting the inside member 103b rotate and move, and by the variable magnetic field formed between a magnet 104 arranged opposite thereto. Then, it may be proper to dispose a rotary member mechanically circulating. Moreover, it may be proper to let the magnetic pole of the developing member 103 rotate and move, and form the alternating electric field between the electrode opposite thereto, for circulation. |
