Sealing member, sealing member mounting method, developing apparatus, process cartridge, process cartridge remanufacturing method and image forming apparatus

摘要

A developing apparatus usable with an image forming apparatus includes a frame having developing device; a toner accommodation container having an opening for supplying toner to the developing device and for accommodating the toner; and an elastic sheet inserted between the frame and the toner accommodation container to seal the opening, wherein the elastic sheet has a thickness larger than the gap when it is not compressed, and has a flexible sheet projected out of the gap. A method of sealing an opening of the toner accommodation container, includes detachably mounting an elastic sheet to a longitudinal end of an insertion member; then inserting the insertion member between the toner accommodation container and the frame to a position for sealing the opening by the elastic sheet; and then removing the elastic sheet from the insertion member. A sealing member for sealing an opening of a toner accommodating container includes a flexible film; and an elastic sheet on the flexible film.