An image forming apparatus includes a chassis having an opening, a cover, photosensitive members, an intermediate transfer belt, a primary-transfer member, a secondary-transfer roller, a cleaner device, an external-sheet inlet, a waste toner container, a connector, and a conveying roller, which is arranged within the feeding path to feed the recording sheet inserted through the external-sheet inlet in the feeding path. The conveying roller is mounted on the waste toner container and removable from the chassis along with the waste toner container.

An image forming apparatus includes an image bearing member, a cleaning device detachably provided on a main assembly to clean toner remaining on the image bearing member, a main assembly feeding portion detachably provided on the main assembly to feed the toner discharged from the cleaning device, a collecting container detachably provided on the main assembly to collect the toner discharged from the main assembly feeding portion, a control portion, and an operating portion capable of inputting a predetermined instruction to the operating portion. Without an image forming operation based on the predetermined instruction, the control portion performs a discharging operation in which the main assembly feeding portion is caused to be driven to discharge the toner inside of the main assembly feeding portion.

An image forming apparatus includes a first detachable unit provided detachably to store discharged residual toner, a second detachable unit provided detachably to store discharged residual toner, and a cassette to accommodate a recording material. Lower surfaces of the first and second detachable units are provided below a lower surface of an intermediary transfer belt and above the cassette. In addition, the first detachable unit is disposed in a position crossing a first cross section perpendicular to a widthwise direction perpendicular to the rotational axis direction of the image bearing member and crossing the intermediary transfer belt, the second detachable unit is disposed in a position crossing a second cross section perpendicular to the widthwise direction and crossing the intermediary transfer belt, and a length of each of the first and second detachable units in the widthwise direction is longer than the length in a vertical direction.

A cartridge including a rotatable image bearing member which bears a developer, a cleaning member for removing a developer remaining on a surface of the image bearing member, the cleaning member having a contact portion in contact with the surface of the image bearing member and a support portion which supports the contact portion, a developer recovering portion which recovers the developer removed by the cleaning member, a first conveyance member which is disposed inside the developer recovering portion and conveys the recovered developer in a rotation axis direction of the image bearing member, a second conveyance member which conveys the developer conveyed by the first conveyance member in a direction crossing the rotation axis direction toward a discharge port provided in the developer recovering portion, and a third conveyance member to convey the developer toward the center of the photosensitive drum in the rotational axis direction. The second conveyance member is disposed at an inner side of the contact portion of the cleaning member with respect to an end part of the contact portion of the cleaning member.

An image forming apparatus includes an image bearing member, a cleaning device detachably provided on a main assembly to clean toner remaining on the image bearing member, a main assembly feeding portion detachably provided on the main assembly to feed the toner discharged from the cleaning device, a collecting container detachably provided on the main assembly to collect the toner discharged from the main assembly feeding portion, a control portion, and an operating portion capable of inputting a predetermined instruction to the operating portion. Without an image forming operation based on the predetermined instruction, the control portion performs a discharging operation in which the main assembly feeding portion is caused to be driven to discharge the toner inside of the main assembly feeding portion.

A developing device includes a conveying member to circulate a developer in a housing, a developer discharge portion extending from one end portion of the housing to form a passage through which surplus developer is discharged from the housing, and a discharge regulation member located on an upstream side of the developer discharge portion with respect to a direction in which the developer is conveyed to the developer discharge portion by the conveying member to partially block a conveying path of the developer. The discharge regulation member includes a lower end portion and an upper end portion arranged apart from a bottom and an upper wall of the conveying path, respectively.

A cartridge including a rotatable image bearing member which bears a developer, a cleaning member for removing a developer remaining on a surface of the image bearing member, the cleaning member having a contact portion in contact with the surface of the image bearing member and a support portion which supports the contact portion, a developer recovering portion which recovers the developer removed by the cleaning member, a first conveyance member which is disposed inside the developer recovering portion and conveys the recovered developer in a rotation axis direction of the image bearing member, and a second conveyance member which conveys the developer conveyed by the first conveyance member in a direction crossing the rotation axis direction toward a discharge port provided in the developer recovering portion, is used.

A toner conveying device includes a drop conveyance passage through which toner falls, an inclined conveyance passage communicating with the drop conveyance passage and extending obliquely downward, a conveyor having a coil shape or a screw shape and disposed in the inclined conveyance passage, and a plurality of flexible sheet having leading ends to contact the conveyor. The leading ends of the plurality of flexible sheets are arranged along a conveyance direction in which the conveyor conveys toner. Adjacent ones of the plurality of flexible sheets are arranged with a clearance larger than a coil pitch or a screw pitch of the conveyor. The clearance is larger between adjacent ones of the plurality of flexible sheets at a position corresponding to an upstream side in the conveyance direction than between adjacent ones of the plurality of flexible sheets at a position corresponding to a downstream side in the conveyance direction.

An example toner cartridge includes a toner container to contain toner, the toner container including a toner outlet, a toner transport member arranged in the toner container to transport the toner to the toner outlet by rotating with respect to a rotation shaft in a first direction, and a waste toner container including a waste toner inlet to receive waste toner, the waste toner inlet arranged in a side portion of the toner container in the first direction. A dispersing member to transport the waste toner in the second direction and disperse the waste toner therein may be arranged in the waste toner container. A driving transfer member may receive rotation power from the toner transport member to drive the dispersing member.

An image forming apparatus includes: an apparatus body; a removable body that is removably attachable to the apparatus body; an installation body including an operating part that operates when manipulated by a user, the installation body being installed in the apparatus body such that the installation body covers at least a portion of the removable body; and an urging unit that operates in association with the operating part and urges the removable body in an attachment direction, in which the removable body is attached to the apparatus body, while at least the portion of the removable body is covered by the installation body.