An image forming apparatus includes: a photosensitive drum; a process frame from which the photosensitive drum is detachable; an apparatus body from which the process frame is removable; a drum shaft including one end constituting a free end, and another end supported by the apparatus body, and transmitting rotational driving force to the photosensitive drum; and a fixing member configured to stop movement of the photosensitive drum, wherein the one end of the drum shaft is configured to penetrate through and protrude from the photosensitive drum, the photosensitive drum includes a first annular protruding portion, the process frame includes a bearing part, the fixing member includes a second annular protruding portion, the one end of the drum shaft is pivotally supported by the fixing member, and the first annular protruding portion of the photosensitive drum is pivotally supported by the second annular protruding portion of the fixing member.

There is provided a manufacturing method of manufacturing a cartridge by using a cartridge having a rotator, a frame that supports the rotator, an elastic member that is provided in a concave portion formed in the frame along a rotation axis direction of the rotator, and a sheet member that has one end fixed to the elastic member and the other end abutting on the rotator along the rotation axis direction of the rotator, and the manufacturing method includes: detaching the rotator from the frame; detaching the sheet member from the frame; detaching the elastic member from the frame; and attaching another sheet member to the frame via an adhesive member that is attached to an adhesive member attachment portion formed in the concave portion of the frame.

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a cartridge frame formed of a resin material; a plurality of resin members molded on the cartridge frame by injection molding of a resin material different from that of the cartridge frame; a plurality of contact surfaces, provided on the cartridge frame, to which metal molds corresponding to the resin members are to be contacted from the same side when the resin members are molded; and a plurality of resin material inlet ports, provided in an opposite side of said cartridge frame from a side where the contact surfaces are provided. The resin material has been flowed into the cartridge frame when the resin members are molded.

A cartridge includes a rotating body, a blade that extends in an axial direction of the rotating body and is disposed on the rotating body, a supporting member that is fixed to the blade and configured to support the blade in such a manner that the blade protrudes toward the rotating body in a shorter direction crossing the axial direction, a frame body including a placing surface that supports the supporting member, and a fixed portion that is disposed on the placing surface via the supporting member and fixed to the frame body. The supporting member includes a cut portion extending in the axial direction. The fixed portion includes a deformed portion deformed by given energy, and the deformed portion engages with the cut portion so that movement of the supporting member with respect to the frame body is restricted.

A management system includes an information processing apparatus that stores management information about cartridges that store consumables and is configured to update the stored management information, and an image forming apparatus configured to print an image on a sheet using the consumables stored in an attached cartridge, storing cartridge information about a cartridge that has been previously attached to the image forming apparatus, and configured to, when a cartridge is attached, retrieve cartridge information from the attached cartridge as first cartridge information and the stored cartridge information as second cartridge information, and transmit the first and second cartridge information to the processing apparatus. Upon receipt of the cartridge information, the processing apparatus determines whether the attached cartridge is a refilled cartridge, and if so, updates the management information so that the cartridge is identified as a refilled cartridge. The processing apparatus transmits a determination result to the image forming apparatus.

A photosensitive member unit for an image forming apparatus includes a rotatable photosensitive drum; a charging roller including an elastic layer; a first spring urging the roller toward the drum; a drive receiving portion provided on the drum; a rotatable spacer including a contact portion contacted to the drive receiving portion and capable of receiving the driving force through the drive receiving portion, the spacer being rotatable between a spacing position for maintaining a spaced state in which the contact portion contacts the drive receiving portion to space the roller from the drum, and a contact position in which the spaced state between the drum and the roller is disestablished, and the spacer being movable toward the drum; a supporting member urging the spacer in a state that spacer is in the spacing position; and a second spring urging the supporting member toward a rotation axis of the spacer.

An apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion and a replenishment port, a transfer portion configured to transfer a developer image on an image bearing member onto a recording material, a supporting tray including a supporting surface configured to support the recording material thereon, and a discharge portion configured to discharge the recording material, onto which the developer image has been transferred, on the supporting surface, wherein the supporting surface has an opening portion opening such that the replenishment port is exposed through the supporting surface, and wherein an opening/closing member configured to be movable between a closed position where the opening/closing member covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed is provided.

An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable, the developer container including an accommodating portion, and a supporting portion, wherein the developer container includes a projection portion that is provided at one end portion thereof in the rotation axis direction of the developer bearing member and projects toward the supporting portion more than a center portion of the developer container in a crossing direction crossing the rotation axis direction, the projection portion communicates with the accommodating portion and includes, at a distal end portion thereof, an attachment portion configured such that the replenishment container is attachable thereto in a state of being exposed to the outside of the apparatus, and a replenishment port for replenishing the accommodating portion with developer from the replenishment container is defined in the attachment portion.

An image forming apparatus includes a developer container to and from which the replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source, wherein the apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.

Provided is a toner cartridge. The toner cartridge includes a body, a plunger, a memory unit, and a holder. The body is to accommodate toner and includes a toner discharge portion. The plunger is provided in the body and to push the toner outside of the body via the toner discharge portion. The memory unit includes an electrical contact portion including at least one electrical contact point. The holder facilities loading of the memory unit therein and being rotatable relative to the body between a home position and a rotated position.