| 摘要 |
<p>The developing device of an electrical photocopying apparatus comprises a developing drum (37). This drum is made of a hollow non-magnetic cylinder (29) and of a set of magnets rotatingly mounted inside the hollow cylinder. On the outer conductive surface of hollow cylinder (29) is placed a magnetic brush made of small magnetic particles for development, said particles being transferred from the magnetic brush onto an intermediary image carrier by means of the electrical field from the latent image. The thickness of wall (53) in the part of hollow cylinder (29) adjacent to the intermediary image carrier (1) is reduced, thus allowing a larger scanning surface in order to achieve a uniform production of the development image. </p> |
