| US 7,596,331 B2 | ||
| Image forming apparatus | ||
| Jiro Kinokuni, Abiko (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Jun. 06, 2007, as Appl. No. 11/758,954. | ||
| Claims priority of application No. 2006-161002 (JP), filed on Jun. 09, 2006. | ||
| Prior Publication US 2007/0286643 A1, Dec. 13, 2007 | ||
| Int. Cl. G03G 15/02 (2006.01) | ||
| U.S. Cl. 399—50 [399/354; 399/55; 399/66; 399/127] | 12 Claims |

| 1. An image forming apparatus, comprising:
a rotatable image bearing member;
a charging member for electrically charging said image bearing member in contact with said image bearing member;
an exposure device for exposing said image bearing member electrically charged by said charging member to light, thereby forming
an electrostatic latent image;
developing means for collecting toner from said image bearing member and for developing the electrostatic latent image into
a toner image on said image bearing member;
a belt member;
a transfer member for transferring the toner image toward said belt member at a transfer position;
removing means for removing toner on said belt member;
an auxiliary charging brush member for electrically charging toner remaining on said image bearing member after transferring
the toner image, said auxiliary charging brush member contacting said image bearing member at a position downstream from the
transfer position and upstream from said charging member with respect to a movement direction of said image bearing member,
wherein a contact area is a portion of said image bearing member in contact with said auxiliary charging brush member before
rotation of said image bearing member begins; and
voltage control means for applying an identical polarity voltage, which is a voltage having a polarity identical to a normal
charge polarity of the toner, to said transfer member for at least a period of time from when the contact area first reaches
the transfer position to a time when the contact area passes through and departs from the transfer position.
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