Image forming apparatus with first and second charging members for charging residual toner

An image forming apparatus comprising:

• an image bearing member for bearing a toner image;
• a movable intermediate transferring member, wherein after a toner image on said image bearing member is temporarily transferred to said intermediate transferring member, the toner image is then transferred to a transfer material at a first transfer portion;
• a first charging member for charging toner on said intermediate transferring member with an applied voltage, wherein an AC voltage is superimposed on a DC voltage;
• and
• a second charging member for charging toner on said intermediate transferring member with an applied DC voltage a polarity of which is the same as a polarity of the DC voltage that is applied to said first charging member, said second charging member being located on an upstream side of said first charging member and on a downstream side of said first transfer portion with respect to a moving direction of said intermediate transferring member,
• wherein the toner charged by said first charging member and said second charging member is transferred from said intermediate transferring member to said image bearing member at a transfer portion between said image bearing member and said intermediate transferring member.