| CPC G03G 21/06 (2013.01) [G03G 15/0233 (2013.01); G03G 15/751 (2013.01); G03G 21/0005 (2013.01); G03G 21/0035 (2013.01); G03G 21/007 (2013.01); G03G 21/10 (2013.01); G03G 21/1814 (2013.01); G03G 21/1821 (2013.01); G03G 2215/025 (2013.01); G03G 2221/0015 (2013.01)] | 12 Claims |
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1. An image forming apparatus comprising:
a rotatable image bearing member about a rotational axis extending in the axial direction thereof;
a charging member configured to form a charging portion between itself and the image bearing member and to charge a surface of the image bearing member;
an accommodating portion configured to accommodate toner charged to a predetermined polarity;
a developing member configured to form a developing portion between itself and the image bearing member and to form a toner image on the image bearing member by supplying the toner to the image developing portion;
a transfer portion contacting the surface of the image bearing member and configured to transfer the toner image;
an eliminating charge portion configured to eliminate charge on the surface of the image bearing member; and
a collecting member configured to collect a deposited matter deposited on the surface of the image bearing member in contact with the surface of the image bearing member,
wherein with respect to the axial direction, when A is defined as a eliminating charge width with which the eliminating charge portion is capable of eliminating the charge on the surface, B is defined as an effective charging width with which the charging member is capable of charging the surface, and C is defined as a collection contacting width with which the collecting member contacts the surface, the following formula is satisfied:
A<B<C, and
wherein with respect to the axial direction, a surface potential of the surface in an area outside the effective charging width, inside the collection contacting width and in contact with the collecting member is a first potential larger than 0V in the same polarity direction as the predetermined polarity.
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