Patent ID: 8180256

Claim:
An image forming apparatus comprising: a photosensitive member; a charging member configured to electrically charge said photosensitive member at a photosensitive member charging position to form an electrostatic image on said photosensitive member; a developing device configured and positioned to develop the electrostatic image on said photosensitive member with toner to form a toner image; a transferring device configured to transfer the toner image on said photosensitive member to an image receiving member at a transfer position; a first brush, disposed at a position which is downstream of the transfer position and is upstream of the photosensitive member charging position with respect to a rotational direction of said photosensitive member, configured to electrically charge a residual toner on said photosensitive member at a toner charging position to collect the residual toner to said developing device, said first brush being supplied with a charging bias having a polarity opposite to a regular charge polarity of the toner; and a second brush, disposed at a position which is downstream of the toner charging position and is upstream of the photosensitive member charging position with respect to the rotational direction, configured to electrically charge the residual toner on said photosensitive member, said second brush being supplied with a charging bias having a polarity which is same as the regular charge polarity, wherein said first brush has a fiber density of 80 kF/inch 2 or more and 250 kF/inch 2 or less and said second brush has a fiber density of 300 kF/inch 2 or more and 600 kF/inch 2 or less, and wherein said first brush and said second brush have a fineness of 0.5 denier or more and 4 deniers or less.