PURPOSE: To improve toner collecting capacity, to make the electrostatic charge uniform and to decrease adverse effect to be exerted on the life of a photosensitive body by making a fiber at the inlet part in contact with the photosensitive body of a fixed-type brush, different from one at the other parts.
CONSTITUTION: In a fixed-type brush, implanting a fiber 3a at an inlet of a part in contact with a photosensitive body 2 is made higher than that of a fiber 3b at the other parts. Since the contact probability of the brush is made higher at the inlet, the collecting capacity of the toner, which infiltrates into the interior of the contact part due to poor cleaning, can be improved, and the electrostatic charge can be made uniform. Because the range of the inlet is several millimeters, the adverse effect to be exerted on abrasion, etc., of the photosensitive body 2 is small, whereby the use over a long time is made possible. The fiber 3a at the inlet can also be made longer or thicker than a fiber at the other parts.
HIROTA MAKOTO
IWAOKA KAZUHIRO
OKADA RYUZO
