Developer accommodating container, a developing device, a process cartridge, and an image forming apparatus whose developer-accommodating-container opening is sealed by a seal member

摘要

A developer accommodating container for accommodating a developer and being detachably mountable to a main assembly of an image forming apparatus includes a main body for accommodating the developer, having an opening for supplying the developer; an unsealable seal member for sealing the opening, and a drive transmitter for transmitting a driving force from the main assembly of the apparatus to apply a force for unsealing the seal member. The drive transmitter transmits the driving force to a movable member which is movable and in contact with the developer after completion of an unsealing operation for the sealing member.