| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of reducing the amount of developer scattering in a space near a developing area. <P>SOLUTION: The apparatus includes: an upstream-side conveying surface TSa arranged facing the circumferential surface DS of a developing roller 33 on the upstream side of the area (developing area) adjacent to a latent image forming surface LS; and a downstream-side conveying surface TSb arranged facing the circumferential surface of the developing roller 33 on the downstream side of the developing area. In the apparatus, an electric field to move the charged developer T from the upstream side to the downstream side is formed on the upstream-side conveying surface and the downstream-side conveying surface. The developer conveying velocity on the upstream-side conveying surface is made higher than that on the downstream-side conveying surface. Consequently, the scattering velocity of the developer not sticking to the circumferential surface but reaching the downstream end part on the upstream-side conveying surface scattering toward the vicinity of the developing area can be reduced, and also, such failures are avoided that the developer stays at the upstream end part on the downstream-side conveying surface and the developer recovery is blocked. <P>COPYRIGHT: (C)2008,JPO&INPIT |
