A powder collection container accommodates a powder discharged from a discharge port of a powder discharge device including a powder discharger provided with a shutter member that opens and closes the discharge port. The powder collection container includes a moving member that is movable between a first position where the moving member abuts against the shutter member to open the discharge port of the powder discharge device, and a second position where the moving member does not abut against the shutter member and the discharge port of the powder discharge device is not opened.

A process cartridge having a drum cartridge and a toner cartridge is provided. The drum cartridge includes a photosensitive drum, a cleaner, a conveyer tube, a developing roller, and a developing device. The toner cartridge is attachable to the drum cartridge and is located on a side of the developing roller opposite to the photosensitive drum in an attaching direction. The toner cartridge includes a waste toner container to store the toner conveyed through the conveyer tube and a toner container to store the toner to be supplied to the photosensitive drum. The toner container communicates with a developing chamber in the developing device and is located at least partly between the waste toner container and the developing chamber. The conveyer tube extends in the attaching direction and is arranged to overlap the photosensitive drum, the toner container, and the waste toner container in a view along an axial direction.

A waste toner container is attachable to and detachable from a housing of an image-forming apparatus through an opening of the housing. The waste toner container includes a casing and a guide pipe connected to the casing. The casing has a first end and a second end positioned opposite to the opening with respect to the first end in a state where the waste toner container is attached to the housing. The guide pipe is pivotally movable relative to the casing between a first position and a second position. The guide pipe extends in a first direction connecting the first end to the second end at the first position, while extending in a second direction crossing the first direction at the second position. The guide pipe at the first position has a length in the second direction smaller than a length thereof in the second direction at the second position.

Provided is an image formation device including a photoreceptor configured to carry a toner image and a developer configured to form the toner image on a surface of the photoreceptor and configured such that the developer is a replaceable development unit, the image formation device including: a development bias application section configured to apply a development bias to between the photoreceptor and the developer; a stabilization control section configured to perform image stabilization control of determining a development bias value to be used in future by changing the development bias while measuring a density of the toner image formed by the developer, thereby obtaining the toner image with a target density; and a life determination section configured to determine expiration of use of the development unit when the development bias value determined by the stabilization control falls outside a preset acceptable range.

A powder container includes a discharge port configured to discharge powder stored in the powder container, a container shutter configured to open and close the discharge port, a first rotation portion configured to be engageable with an engagement portion of a removable component, an operation device configured to rotate the first rotation portion in conjunction with an operation of the operation device, and a contact portion included in the first rotation portion. The engagement portion opens and closes a cartridge shutter to open and close an inlet port of the removable component. A restriction member of the removable component is configured to restrict the rotation of the engagement portion. The contact portion contacts the restriction member to cancel the restriction member from restricting rotation of the engagement portion in conjunction with attachment of the powder container to the removable component.

An image formation apparatus according to an aspect of one or more embodiments may include: replacement units, each being replaceable and including an expendable part and a developer collection container; and a determination unit. The determination unit is configured to: acquires an expendable part life progress degree representing a degree of progress in used amount of the expendable part relative to a product life of the expendable part and a collection container capacity progress degree representing a degree of progress in used amount of the developer collection container relative to a capacity of the developer collection container for each of the replacement units; and determines a developer collection container as a developer collection destination out of the developer collection containers of the replacement units, based on the acquired expendable part life degrees and the acquired collection container capacity progress degrees.

An image-forming apparatus includes an apparatus body and a process cartridge attachable to and detachable from the apparatus body. The apparatus body includes a sheet-feed roller and a body wall. The process cartridge includes: a photosensitive drum; a drum frame; a developing roller; a cleaner; a conveying pipe and a waste-toner container for storing waste toner removed from the photosensitive drum by the cleaner and conveyed by the conveying pipe. The waste-toner container is detachably mountable on the drum frame. The waste-toner container mounted on the drum frame is positioned opposite to the photosensitive drum with respect to the developing roller. The body wall of the apparatus body and a container wall of the waste-toner container constitute a part of a sheet-conveying guide for guiding conveyance of a sheet from the sheet-feed roller toward the photosensitive drum when the process cartridge is attached to the apparatus body.

An image forming apparatus is provided. The 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 a main frame, a plurality of process cartridges, a cartridge-supporting body, a belt, a waste toner cartridge, a contact-separation mechanism, and a collective conveying unit. Each process cartridge includes a photosensitive drum and a drum cleaning unit collecting waste toner on the drum. The cartridge-supporting body is movable between an internal position inside the frame and an external position outside the frame. The belt confronts the process cartridges in the internal position. The waste toner cartridge accommodates the waste toner collected from the drums. The contact-separation mechanism moves the cartridge-supporting body between a contact position where the drums are in contact with the belt and a separated position where the drums are out of contact with the belt. The collective conveying unit aggregates waste toner collected from drums and conveys collectively the aggregated waste toner to the waste toner cartridge.

A process cartridge having a drum cartridge and a toner cartridge is provided. The drum cartridge includes a photosensitive drum, a cleaner, a conveyer tube, a developing roller, and a developing device. The toner cartridge is attachable to the drum cartridge and is located on a side of the developing roller opposite to the photosensitive drum in an attaching direction. The toner cartridge includes a waste toner container to store the toner conveyed through the conveyer tube and a toner container to store the toner to be supplied to the photosensitive drum. The toner container communicates with a developing chamber in the developing device and is located at least partly between the waste toner container and the developing chamber. The conveyer tube extends in the attaching direction and is arranged to overlap the photosensitive drum, the toner container, and the waste toner container in a view along an axial direction.