Image forming apparatus

An image forming apparatus comprising:

• an image bearing member configured to carry a toner image;
• an intermediary transfer belt configured to receive the toner image from said image bearing member;
• a primary transfer member provided in contact with said intermediary transfer belt at a primary transfer position and configured to primary-transfer the toner image from said image bearing member onto said intermediary transfer belt by supplying a primary transferring current to said intermediary transfer belt;
• a secondary transfer member provided in contact with said intermediary transfer belt at a secondary transfer position and configured to secondary-transfer the toner image from said intermediary transfer belt onto the recording material by supplying a secondary-transfer current to said intermediary transfer belt;
• a first cleaning member provided in contact with said intermediary transfer belt at a first cleaning position downstream of said secondary transfer position and upstream of said primary transfer position in a rotational moving direction of said intermediary transfer belt, said first cleaning member being configured to collect the toner charged to a polarity opposit to a regular polarity from said intermediary transfer belt with a first cleaning current flowing between said intermediary transfer belt and said first cleaning member;
• a second cleaning member provided in contact with said intermediary transfer belt and a second cleaning position downstream of said secondary transfer position and the upstream of said primary transfer position in the rotational moving direction of said intermediary transfer belt, said second cleaning member being configured to collect the toner charged to the regular polarity from said intermediary transfer belt with a second cleaning current flowing between said intermediary transfer belt and said second cleaning member;
• and
• a discharge member provided in contact with said intermediary transfer belt at a discharging position downstream of said secondary transfer position and upstream of said first cleaning position in the rotational moving direction of said intermediary transfer belt, said discharge member being configured to collect the toner charged to the regular polarity from said intermediary transfer belt and discharged said intermediary transfer belt with a discharge current flowing between said intermediary transfer belt and said discharge member,
• wherein an absolute value of the discharge current at the time when an image area of said intermediary transfer belt on which the toner image to be transferred to the recording material is formed passes the discharge position is larger than an absolute value of the second cleaning current at the time when the image area of said intermediary transfer belt passes the second cleaning position, and
• wherein an absolute value of a first current balance is not more than 50% of an absolute value of a second current balance, wherein the first current balance is a sum of the primary transferring current, the secondary-transfer current, the first cleaning current, the second cleaning current, and the discharge current at the time when the image area of said intermediary transfer belt passes the primary transfer position, the secondary transfer position, the first cleaning position, the second cleaning position, and the discharge position, respectively, and the second current balance is the first current balance minus the discharge current at the time when the image area of said intermediary transfer belt passes the discharge position, when a current flowing in a direction from an inner surface side toward an outer peripheral surface side of said intermediary transfer belt is taken as positive current.