In a remanufacturing method for remanufacturing a cartridge from a material cartridge, the material cartridge is attachable to and detachable from an apparatus main body of an image forming apparatus, and the apparatus main body includes a guide member. The material cartridge includes a frame member including an engagement portion configured to be engaged with the guide member, and a first attachment portion provided in the engagement portion, and a first storage member. The first storage member includes a first holding portion configured to hold a first electrode and be attached to the first attachment portion. The remanufacturing method includes detaching the first holding portion, attaching a second electrode to the frame member, and attaching a second storage element to the frame member at a different position from a position of the first attachment portion.

An example toner refill cartridge includes a body including a toner accommodating portion to accommodate toner and a toner discharge port provided at an end portion of the body in a longitudinal direction to be in communication with the toner accommodating portion, a first member rotatably supported by the body and having a spiral portion extending in the longitudinal direction, a second member located inside the first member and having a guide groove extending in the longitudinal direction, and a plunger having a guide protrusion which passes through the guide groove to engage the spiral portion, to push the toner inside a toner accommodating portion toward a toner discharge port while being moved in the longitudinal direction as the first member is rotated.

Discloses herein is a storage component disassembly tooling, for disassembling a storage component on a process cartridge, the process cartridge comprising a housing and a storage component mounting bracket on the housing for supporting the storage component, the storage component disassembly tooling comprising: a drilling portion, and a positioning portion; wherein the positioning portion is configured to position the storage component disassembly tooling on the housing of the process cartridge, and the drilling portion is configured to move relative to the positioning portion to destroy at least a part of the storage component mounting bracket.

An image forming apparatus is configured to allow a replenishment container to be detachably attached thereto. The image forming apparatus includes a drum unit including a photosensitive drum, and a development unit. The development unit includes a development roller, a reception portion configured to receive the replenishment container. The development unit is movable relative to the drum unit. The image forming apparatus further includes a housing including an opening/closing member movable between a cover position, at which the opening/closing member covers the reception portion, and an exposing position, at which the reception portion is exposed, and a support member configured to be movable between a support position, at which the support member supports the development unit, and a retracted position, at which the support member is retracted from the support position, in conjunction with the movement of the opening/closing member.

A device is to supply printing material to a printing material container in a printing apparatus. The device includes a first container to contain printing material, a first piston movable in the first container to exert first pressure to discharge the printing material contained in the first container from the first container, a second container having an opening to the first container, and a second piston movable in the second container to exert second pressure higher than the first pressure to form a pressure gradient based on the first pressure and the second pressure through the opening. The pressure gradient is to disperse the printing material in the first container.

The process unit is configured to be rotatable relative to the frame about a rotation axis extending in a rotation axis direction of the photosensitive drum between a first position at which the photosensitive drum comes into contact with the transfer member and forms the transfer nip portion and a second position at which the photosensitive drum is separated from the transfer member, and a direction in which the process unit rotates from the first position to the second position is a direction in which the replenishing port of the process unit moves away when the process unit is viewed from the front surface side.

A device to supply printing material to a printing material container of a printing apparatus includes a container including a plunger and to contain the printing material, a portal couplable to a refill port to the printing material container. The portal includes a discharge port through which the printing material is transferrable from the container, and a connector to receive power to move the plunger, to cause a transfer of the printing material contained in the container to the printing material container through the discharge port.

A cartridge includes: a housing; a storage medium having an electrical contact surface; and a holder movable relative to the housing. The holder includes a first holder member and a second holder member movable relative to the first holder member. The first holder member includes at least one pawl and holds the electrical contact surface at one end surface of the first holder member in a first direction crossing the electrical contact surface. The second holder member includes at least one corner part engageable with the at least one pawl to provide an engaging portion therebetween. The second holder member has a through-hole that is open at another end face of the second holder member in the first direction. The engaging portion is accessible from an outside of the holder through the through-hole.

An image forming apparatus includes an image bearing member, a developer container, a developing portion, a replenishment port configured to allow replenishment of one-component developer from a replenishment container, a conveyance portion configured to convey the developer accepted for replenishment through the replenishment port toward the developing portion, a developer remainder amount detection portion whose output value changes on a basis of an amount of developer accommodated in the developer container. A controller changes a developer conveyance speed of the conveyance portion in a conveyance operation on a basis of the output value of the developer remainder amount detection portion, the conveyance operation being an operation of conveying developer toward the developing portion by the conveyance portion and is performed before the image forming operation is started.

Provided is a method for removing a first holder member from a second holder member in a cartridge. The cartridge includes: a housing; the first holder member holding an electrical contact surface; and the second holder member supported by the housing. The first holder member includes a pawl, and the second holder member includes a corner part engageable with the pawl of the first holder member. The electrical contact surface is held at one end surface of the first holder member in a first direction crossing the electrical contact surface. The method includes: disengaging the pawl from the corner part; and separating the housing and the second holder member from the first holder member in the first direction away from the one end surface of the first holder member.