Patent ID: 7515846
Filing Date: 2009-04-07
Classification: G03G

Abstract:
1. A cleaning device for cleaning a charging roller for charging the outer circumferential surface of a photoconductive drum by being rotated in contact with the photoconductive drum, comprising: a cleaning member having a rotary shaft extending in a direction of a rotary axis of the charging roller, and rotating in contact with the outer circumferential surface of the charging roller and adapted to clean the outer circumferential surface of the charging roller by brushing; rotational driving unit rotating the cleaning member while making the circumferential speed thereof differ from that of the charging roller; and thrust driving unit reciprocating the cleaning member along the direction of the rotary axis of the charging roller while holding the cleaning member in sliding contact with the outer circumferential surface of the charging roller, the fineness of each bristle of a brush provided around the rotary shaft of the cleaning member being set to 10 T or lower and the bristle density of the brush being set to 300 kF/inch