| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device including a plurality of developing sleeves and an image forming apparatus in which the life of the developing sleeves may be elongated by stabilizing a developer conveying property over time and occurrence of unevenness in density may be suppressed. <P>SOLUTION: As typical structures for a developing device and an image forming apparatus of the invention, a developing device 104 for developing an electrostatic latent image having been formed on a photosensitive drum 101 with a developer, comprises a plurality of developing sleeves 6 and 7 carrying a developer on surfaces thereof for developing the electrostatic latent image having been formed on the photosensitive drum 101. Out of the plural developing sleeves 6 and 7, one developing sleeve with largest driving torque has a circumferential face that has been subjected to processing for forming a plurality of grooves 14 each including at least a component along a shaft direction of the developing sleeve and arranged in parallel at prescribed intervals, and the other developing sleeve has a circumferential face having been subjected to blast processing with spherical particles. <P>COPYRIGHT: (C)2012,JPO&INPIT |
