An image forming apparatus (1) includes an image bearing member (50), a charging section (51), a developing section (52), and a cleaning member (81). The image bearing member (50) contains filler particles (87). The charging section (51) is either in contact with or positioned close to the image bearing member (50) and is configured to electrically charge the image bearing member (50) by generating a proximity discharge between the charging section (51) and the image bearing member (50). The developing section (52) supplies toner to the circumferential surface of the charged image bearing member (50). The cleaning member (81) has a degree of hardness equal to or higher than 65° and a degree of impact resilience equal to or lower than 30%. The cleaning member (81) is brought into pressure contact with the circumferential surface of the image bearing member (50) being rotated, by applying linear pressure equal to or higher than 15 gf/cm.

A cartridge attachable to and detachable from an image forming apparatus forming an image on a recording material, the cartridge includes: an image bearing member; a developer container that contains therein a developer; a developing member that is rotatable and carries the developer supplied from the developer container and supplies the developer to the image bearing member; a developer supplying member that is rotatable and provided in the developer container and in contact with the developing member to supply the developer to a surface of the developing member; and a contact member provided in the developer container and in contact with a surface of the developer supplying member, wherein the developer remaining on the image bearing member after image formation is collected to the developing member, and the developer collected to the developing member is collected into the developer container.

A control unit performs control to make a direction of an electric field generated in a first area of an image carrier forming a transfer portion during image forming operation, relative to a voltage applied to a brush member in a state where the first area passes through a contact portion, different from a direction of an electric field generated in a second area of the image carrier forming the contact portion, relative to the voltage applied to the brush member during a period when operation is shifted from first operation in which the image carrier is rotated at a first speed to second operation in which the image carrier is rotated at a second speed different from the first speed, during non-image forming operation different from the image forming operation.

A drum cleaner in a drum unit removes toner from a photosensitive drum. A waste-toner conveyance pipe has a waste-toner discharge port and conveys toner removed from the photosensitive drum by the drum cleaner. A toner accommodation chamber accommodates toner to be supplied to a developing roller. A waste-toner accommodation chamber accommodates toner removed from the photosensitive drum. A toner cartridge rotatably moves relative to the drum unit between: a first position at which a waste-toner receiving port is separated from the waste-toner discharge port in a state where the toner cartridge is mounted on the drum unit; and a second position at which an internal space of the waste-toner accommodation chamber is in communication with an internal space of the waste-toner conveyance pipe through the waste-toner discharge port and the waste-toner receiving port in a state where the toner cartridge is mounted on the drum unit.

Fluctuations in chargeability in an initial state are expected to be small. If a charging member is new, an image forming apparatus performs a supply operation for supplying a developer or a lubricant prior to an image forming operation in such a manner that the developer or the lubricant adheres to a surface of the charging member.

A control unit performs control to make a direction of an electric field generated in a first area of an image carrier forming a transfer portion during image forming operation, relative to a voltage applied to a brush member in a state where the first area passes through a contact portion, different from a direction of an electric field generated in a second area of the image carrier forming the contact portion, relative to the voltage applied to the brush member during a period when operation is shifted from first operation in which the image carrier is rotated at a first speed to second operation in which the image carrier is rotated at a second speed different from the first speed, during non-image forming operation different from the image forming operation.

Provided are an image bearing member; a charging member that charges the image bearing member; an exposure unit that exposes the image bearing member; a developing unit that develops an electrostatic latent image as a developer image by supplying a developer, charged to regular polarity, to the image bearing member; a transfer member that transfers the developer image to a transfer-receiving body; and a collecting member that collects a deposit on the image bearing member downstream of a transfer portion of the image bearing member at which the developer image is transferred to the transfer-receiving body by the transfer member, and upstream of a charging portion of the image bearing member charged by the charging member, in a rotation direction of the image bearing member. After transfer of the developer image to the transfer-receiving body, the developer remaining on the image bearing member is collected by the developing unit.

An image forming apparatus includes a photosensitive drum, a development roller configured to supply developer to the photosensitive drum, a transfer roller configured to transfer a developer image formed on the photosensitive drum to a recording material, and a cleaning roller being in contact with the photosensitive drum, configured to clean a part of the recording material adhered to the photosensitive drum, wherein the diameter of the transfer roller is greater than the diameter of the development roller and the diameter of the cleaning roller is greater than the diameter of the development roller.

Provided are an image bearing member; a charging member that charges the image bearing member; an exposure unit that exposes the image bearing member; a developing unit that develops an electrostatic latent image as a developer image by supplying a developer, charged to regular polarity, to the image bearing member; a transfer member that transfers the developer image to a transfer-receiving body; and a collecting member that collects a deposit on the image bearing member downstream of a transfer portion of the image bearing member at which the developer image is transferred to the transfer-receiving body by the transfer member, and upstream of a charging portion of the image bearing member charged by the charging member, in a rotation direction of the image bearing member. After transfer of the developer image to the transfer-receiving body, the developer remaining on the image bearing member is collected by the developing unit.

A cartridge attachable to and detachable from an image forming apparatus forming an image on a recording material, the cartridge includes: an image bearing member; a developer container that contains therein a developer; a developing member that is rotatable and carries the developer supplied from the developer container and supplies the developer to the image bearing member; a developer supplying member that is rotatable and provided in the developer container and in contact with the developing member to supply the developer to a surface of the developing member; and a contact member provided in the developer container and in contact with a surface of the developer supplying member, wherein the developer remaining on the image bearing member after image formation is collected to the developing member, and the developer collected to the developing member is collected into the developer container.