Developing apparatus, process cartridge and image forming apparatus.
A developing apparatus for developing a latent image formed on an image bearing member includes a first frame having a developer container for containing a developer; a second frame having a developer carrying member for carrying the developer supplied from the developer container to supply the developer to the latent image; a sealing member (17a,17b) for sealing an opening for supplying the developer from the developer container to the developer carrying member; wherein the sealing member (17a,17b) is pulled between the first frame and the second frame along a pulling path in a pulling direction, whereby the opening is opened; an end seal (21) downstream of said opening and a projection (23) disposed in contact with said end seal (21) upstream of said end seal (21) with respect to said pulling direction. <IMAGE>