Developing device

Abstract

Abstract PURPOSE:To prevent a developer from being deposited at near the center of electrode and to improve the conveyance performance of the developer by improving the shape of electrodes of a developing device which conveys the developer to a picture to be developed by moving the developer among the electrodes. CONSTITUTION:A plate type toner carrier 19 is provided in a toner container 16 provided facing the photosensitive drum 11 of an electrophotographic copying machine. A copper-made electrode group 20 formed linearly is provided on the surface of the toner carrier 19 at eqaul intervals in parallel to the axial direction for the photosensitive drum 11. On the other hand, the electrode group 20 is applied with a potential which varies successively with time to generate an alternating electric field which has progressive waveform from the left to the right on the surface of the toner carrier 19, and toner is conveyed by its operation of the alternating electric field among electrodes on oscillation, floating, and smoke basis. In this case, end surfaces of respective electrodes are slanted to the movement direction of the developer to obtain a distribution of lines of electric force as shown by dotted lines in figure, conveying the toner smoothly.

Inventors

• 👤 Takeshi Nozaki
• 👤 武史 野崎
• 👤 Masahiro Hosoya
• 👤 雅弘 細矢
• 👤 Koji Tanimoto
• 👤 弘二 谷本

Bibliographic Details