Patent ID: 7929896
Filing Date: 2011-04-19
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a unit frame; a plurality of rollers mounted on said unit frame; an image bearing member having an image bearing surface wound around said plurality of rollers and adapted to move in a given moving direction and bear a toner image thereon; a main cleaning device disposed in opposed relation to said image bearing surface to electrically remove residual toner remaining on said image bearing surface; a casing fixed to said unit frame and housing said main cleaning device; a power supply adapted to apply to said main cleaning device a bias having a polarity reverse to a charge polarity of said residual toner; an auxiliary cleaning device provided in a vicinity of and on an upstream side relative to said main cleaning device with respect to said moving direction of said image bearing surface, said auxiliary cleaning device having a frame member with opposite first and second ends, a cleaner attached to the first end of the frame member and adapted to be brought into contact with said image bearing surface; and a support structure which pivotally supports said second end of the frame member of said auxiliary cleaning device in rotatable a manner relative to the casing to permit the cleaner attached to the first end of the frame member of said auxiliary cleaning device to be swingingly moved simultaneously with the moving of the image bearing surface while following a displacement of said image bearing surface during the moving.