| 摘要 |
PURPOSE:To abut a flexible sheet provided on an opening for returning a developing sleeve into a container on a developing sleeve with high accuracy and simultaneously to stabilize the abutting state for a long period. CONSTITUTION:A side seal 11 is abutted on the sleeve 5 along the rotational direction of the sleeve on the end part in the longitudinal direction of the developing sleeve 5. On the other hand, on the return opening for returning the sleeve 5 into the container, the flexible sheet 9 is arranged so as to abut on the sleeve 5 along the longitudinal direction of the sleeve. At this time, on the slide seal 11, an extending part 111 extended in the direction opposite to the rotational direction of the sleeve is provided away from the sleeve 5 and the flexible sheet 9 is superimposed on a sheet supporting surface 112 provided on the extending direction without a gap. |
