| 摘要 |
PURPOSE:To uniformly electrify toner even if contact-pressure of the toner with a toner carrier is uneven and to obtain an image without density irregularity by employing magnetic, whose surface is treated with titanite coupling agent, as magnetic powder added to the toner. CONSTITUTION:An electrostatic latent image holding body 1 is confronted with a toner carrier 5 carrying a toner layer pressed and formed by a layer regulating member 3 made of a soft elastic body 71 in a developing area so that they come into contact with each other or are away from each other at a fixed interval. In this condition, the electrostatic latent image is developed. A magnetic toner 4 formed by dispersion magnetic powder treated with the titanite coupling agent into binder resin is employed as the toner used here. Even if the toner is brought into uneven press-contact with the toner carrier, it can be uniformly electrified to obtain an excellent quality image free of density irregularity. |
