| 摘要 |
PURPOSE:To enable development high in image density and sharpness, and free from fog, by moving a body bearing an electrostatic latent image, from a low peak of a magnetic field. CONSTITUTION:A main magnet 15 consists of pieces of magnets 15a, 15b, and a magnetic field formed on a sleeve 12 by the main magnet 15 makes as asymmetric magnetic field having 2 peaks of a weak magnetic field 16a and a strong magnetic field 16b. A developer conveyed to a developing region on a sleeve by the coaction of an auxiliary magnet is forced to form a brush by the field 16a formed by the piece 15a of the main magnet 15, and the developer of this brush is allowed to jump by the field 16b formed by the piece 15b to develop an electrostatic latent image formed on a photoreceptor. Further, the developer is forced to form a brush by the strong magnetic field 16b to develop the image again. |
