| 摘要 |
A developing apparatus according to the present invention is opposed to a photosensitive layer of a photosensitive drum, and supplies the photosensitive layer with a nonmagnetic insulating toner of one component type charged for a predetermined polarity, to develop an electrostatic latent image formed on the photosensitive layer. The developing apparatus is provided with a developing roll which comprises a rotatably cylindrical roll body formed of a dielectric material and hundreds or thousands of linear microelectrodes attached to that surface of the roll body which faces the photosensitive layer, each of the microelectrodes being apart from the adjacent ones and having a surface which faces the photosensitive layer and is exposed, and an electrical power source for impressing at least one pair of adjacent microelectrodes among the plurality of the microelectrodes with a voltage to generate an electric field with a magnitude high enough to fly the toner on one of the pair of electrodes therefrom. |
