| 摘要 |
PURPOSE:To prevent blade rolling-up, cleaning failures, filming, etc., and to form an image of good quality by changing the projecting length of a cleaning member, and making an abutting pressure of direction of an abutting surface on a carrier different in position. CONSTITUTION:A part corresponding to non-developed image corresponding areas (a), (a) of blade holders 67A, 67B is notched and made shorter than the middle part. In a developed area (x) of a photosensitive drum 20, toner is formed already by a copy cycle until the previous time and it serves as a lubricant, and the frictional resistance of an abutting surface of this area and a cleaning blade 66 is low. Also, as for the non-developed image corresponding areas (a), (a) of the cleaning blade 66, the contact pressure is low since a projecting length L from a holder 67 is longer than that of the middle part, and the frictional resistance of the abutting surface of the drum 20 also becomes low. In this way, rolling-up of the blade 66, damage of the surface of the photosensitive drum 20, drum filming, cleaning failures generated by triboelectrification existing between the blade and the photosensitive drum 20, etc. can be eliminated. |
