| 摘要 |
A developer supply container for supplying a developer for developing a latent image formed on a photosensitive member is provided, wherein the container is inserted into a developer accommodating container which is provided in a process cartridge, through an entrance opening, and the developer is supplied while the container is in the developer accommodating container, and wherein the entrance opening is covered by an openable cover, and wherein when the developer supply container is mounted and demounted, the openable cover is opened, the developer accommodating container being usable with an electrophotographic image forming apparatus. The developer supply container includes a developer accommodating portion for accommodating the developer; a supply opening for supplying the developer accommodated in the developer accommodating portion to the developer accommodating container; a seal member for openably sealing the supply opening; a closing member for closing the openable cover, while the developer supply container is mounted in the developer accommodating container, wherein when the developer supply container is not mounted in the developer accommodating container, the openable cover is not closable.
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