| 摘要 |
A process cartridge removably mountable onto a main body of an electrophotographic image forming apparatus includes an electrophotographic photosensitive member, a developing device for developing a latent image formed on the electrophotographic photosensitive member, a developing frame, including a toner receptacle for accommodating a toner used for development by the developing device, for supporting the developing device, a toner supply opening, provided in the developing frame, for supplying the developing device with the accommodated toner, a toner seal, detachably mounted on a mounting portion provided at the circumference of the toner supply opening of the developing frame, for sealing the toner supply opening, and seal members provided in a state of being overlapped on the toner seal at the mounting portion in order to prevent leakage of the toner from the developing frame. The seal member are preferably mounted on mounting members which can either slide into grooves or are integral with a developing device frame member. The mounting members can be made from a magnetic material.
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