A powder storage device includes a container housing and a powder storage. The container housing is configured to allow the powder container to rotate around a rotation axis α. When the powder container is rotated from an installing position to a predetermined position in a peeling-off rotation direction around the rotation axis α, a supply port moves to a position corresponding to a receiving port, a bonder in which the sealer adheres to the powder container is peeled off, and thus the supply port and the receiving port are interconnected.

A toner sealing system is described including a seal having first and second alignment features. The seal is selectably installable on one of a first toner container of a first type and a second toner container of a second type. The first alignment feature is matable with a first corresponding alignment feature on the first toner container when the seal is installed on the first toner container for aligning the seal to the first toner container. The second alignment feature is matable with a second corresponding alignment feature on the second toner container when the seal is installed on the second toner container for aligning the seal to the second toner container. Embodiments include those wherein the first alignment feature does not align the seal to the second toner container, and the second alignment feature does not align the seal to the first toner container.

The disclosed structure includes a belt-shaped conveying member configured to convey developer. The conveying member includes a partitioning portion, which is a partition for developer contained in a casing with respect to a conveying direction in which the developer is conveyed, wherein, when the developer container is new, a first developer amount which is an amount of the developer contained at an upstream side that is upstream of the partitioning portion in the conveying direction, is larger than a second developer amount which is an amount of the developer contained at a downstream side that is downstream of the partitioning portion in the conveying direction.

A developing device including a developer container includes a containing chamber including an opening and configured to contain developer, a sealing member folded and configured to seal the opening, and an unsealing member to which one end of the sealing member is fixed. The containing chamber includes a first fixing portion and a second fixing portion that are fixed to the sealing member configured to seal the opening. A rotation center of the unsealing member is located at a position opposing an unsealing fulcrum of the unsealing member with respect to a virtual plane including the first fixing portion, the second fixing portion, and the opening when the sealing member is peeled from the containing chamber. Accordingly, a force required to peel the sealing member can be reduced.

A frame including an opening and configured to store a developer, a seal member configured to seal the opening, and an unsealing member including a fixing portion to which the seal member is bonded or welded are included, and by movement of the unsealing member the seal member is removed from the frame to open the opening.

A developer cartridge includes a developer container, a casing, a sealing member, and a drive input. The developer container is configured to sealingly contain developer therein. The developer container has an outlet through which the developer flows out of the developer container. The casing is configured to accommodate the developer container therein. The casing supports the developer container to allow the developer container to rotate about an axis thereof in a rotating direction. The sealing member is configured to seal the outlet. The drive input is configured to transmit rotational driving force to the developer container. The sealing member is fixed to the casing.

A third communicating portion is disposed downstream of the first communicating portion and upstream of the second communicating portion in the first direction. The third communicating portion is disposed above a rotational axis of a first conveyance screw and a rotational axis of a second conveyance screw in a vertical direction. The third communicating portion is configured to allow air inside the developing container to move between the first chamber and the second chamber. An opening portion for discharging the air inside the developing container outside the developing container is disposed above the second chamber in the vertical direction.

Provided is a developer container, including: a frame body having an opening; a sealing member configured to seal the opening; an unsealing member configured to unseal the opening by moving the sealing member and accommodated inside the frame body; and a part of the sealing member peelably bonded to an outer peripheral edge of the opening on an opposite side of the unsealing member with respect to the opening.

A developing apparatus includes a developing container, a lid that is fixed to the developing container and defines a storage space for developer, a developing roller, and a conveyance member for conveying the developer toward the developing roller. The conveyance member includes a sheet and a support member that supports the sheet and is rotatable about a rotation axis together with the sheet. The sheet has a first distance between the rotation axis and an edge of the sheet in a state in which the sheet is unbent. The lid includes a corner portion that extends the storage space outward of an imaginary circle with a radius of the first distance centered on the rotational axis, and a contact portion that protrudes from the corner portion to the inner side of the imaginary circle and is configured to come into contact with the rotating sheet.

A powder accommodating container includes a powder accommodating portion that accommodates powder, a sealing section that openably seals a supply port by being removed from the powder accommodating portion, and a breaking section that has a film-shaped member that breaks the powder in the powder accommodating portion by being removed from the powder accommodating portion in a case of opening the supply port, is fixed to plural places in the powder accommodating portion such that the film-shaped member is removable, and is fixed to the powder accommodating portion such that a force required for removing a tip of the film-shaped member from the powder accommodating portion is larger than other portions.