| 摘要 |
PURPOSE:To reduce the frictional resistance between a cleaning blade and the surface of a photosensitive body by molding the cleaning blade of polyurethane resin to which specific amounts of polyvinylidene fluoride and silicon oxide of specific particle size are added respectively. CONSTITUTION:The clean device of the electrophotographic copying machine has the cleaning blade nearby a photosensitive body which rotates in one direction and presses its front end against the surface of the photosensitive body to scrape toner remaining on the surface. The cleaning blade is molded of polyurethane resin to which 20-50pts.wt. polyvinylidene of 0.1-1.0mum in particle size and 10-60pts.wt. silicon oxide of 10-1.0mum are added respectively. Consequently, the frictional resitance between the photosensitive body surface and cleaning blade is reduced to prevent the abrasion or deformation of the blade, and a flaw, etc., formed in the surface are removed by polishing the surface, so that stable cleaning effect is maintained for a long period. |
