Image forming apparatus

An image forming apparatus comprising:

• a rotatable photosensitive drum;
• a charging member that charges a surface of the photosensitive drum;
• a charging voltage application portion that applies a charging voltage to the charging member;
• an exposure device that exposes the surface of the photosensitive drum and forms an electrostatic latent image thereon;
• a developing member that comes into contact with the photosensitive drum to form a developing portion and supplies, by the developing portion, a toner charged with a normal polarity to the surface of the photosensitive drum charged by the charging member;
• a developing voltage application portion that applies a developing voltage to the developing member;
• an intermediate transfer member that comes into contact with the photosensitive drum to form a transfer portion, the toner supplied to the surface of the photosensitive drum being transferred to the intermediate transfer member by the transfer portion;
• a transfer member that comes into contact with the intermediate transfer member;
• a transfer voltage application portion that applies a transfer voltage to the transfer member;
• and
• a control portion that controls the charging voltage, an amount of exposure of the exposure device, the developing voltage, and the transfer voltage, the control portion being configured to be able to execute i) an image forming operation of forming an image on a recording material, and ii) a toner supplying operation in which toner is supplied from the developing member to the photosensitive drum such that, when a first region of the photosensitive drum to which toner has been supplied passes through a transfer portion, which is an abutting portion between the photosensitive drum and the intermediate transfer member, for a first time, a part of the toner supplied is moved to the intermediate transfer member, another part of the toner remains in the first region, and, when the residual toner passes through the transfer portion again, the residual toner is moved to the intermediate transfer member.

An image forming apparatus comprising:

• a photosensitive drum;
• a charging member that charges a surface of the photosensitive drum;
• an exposure device that exposes the surface of the photosensitive drum and forms an electrostatic latent image thereon;
• a developing member that comes into contact with the photosensitive drum to form a developing portion and supplies, by the developing portion, a toner charged with a normal polarity to the surface of the photosensitive drum charged by the charging member;
• an intermediate transfer member that comes into contact with the photosensitive drum to form a transfer portion, the toner supplied to the surface of the photosensitive drum being transferred to the intermediate transfer member by the transfer portion;
• a control portion that controls a surface potential of the photosensitive drum, the control portion being configured to be able to execute i) an image forming operation of transferring a toner image from the photosensitive drum to the intermediate transfer member and ii) a toner supplying operation of supplying a toner from the developing member to the photosensitive drum, collecting a part of the supplied toner by the developing member, and moving a part of the toner to the intermediate transfer member;
• and
• a consumption amount acquisition portion being configured to be able to acquire an amount of consumed toner in the toner supplying operation on the basis of a value related to an amount of toner supplied from the developing member to the photosensitive drum in the toner supplying operation and a correction coefficient related to an amount of toner collected by the developing member in the toner supplying operation.