| 摘要 |
PURPOSE:To prevent the generation of an accumulation of a developer in the vicinity of the center of an electrode by providing an opposed electrode in a different phase position from electrodes in a part of a developer carrying electrode group, and impressing the voltage which is varied with lapse of time to the opposed electrode. CONSTITUTION:A non-magnetic toner 17 of a developer is moved and carried by an electrode group 20 impressed with a voltage varying with lapse of time, of a developer carrying body 19. In an area 19b covering the vicinity of a photosensitive drum 11 of this carrying body 19, an electrode group 21 is provided in a different phase position opposed to the electrode group 20, and when the potential which is varied with lapse of time is impressed to the group 21, an electric field is generated densely in the center part of the electrode group 20, too. As a result, the toner 17 moves in a good state, and the generation of an accumulation of a toner in the vicinity of the center of each electrode of the electrode group 20 is prevented. |
