| 摘要 |
PROBLEM TO BE SOLVED: To prevent leakage of a developer from between two developing sleeves in a developing sleeve rotational direction, when performing sealing of a developing sleeve end part using a magnet member, in a developing device including a plurality of developing sleeves.SOLUTION: In a developing device including a plurality of developing sleeves and performing developing sleeve end part sealing using the magnet member, the second magnetic pole and third magnetic pole of a magnet included in a second developer carrier form a repulsion pole. It is constituted so that a position facing the downstream end of the magnet member in the rotational direction of the second developer carrier is included in a zero-gauss zone, so that the leakage of the developer from between two developing sleeves in the developing sleeve rotational direction is prevented.SELECTED DRAWING: Figure 3 |
