Patent ID: 9547259
Date: 2017-01-17
CPC Classifications: G03G

Claim:
1. A development device used for an image forming apparatus, the development device comprising: a frame member; a developer bearing member configured to develop a latent image formed on an image bearing member using developer; and an edge portion sealing member provided between an edge portion in a rotational axis direction of the developer bearing member and the frame member to prevent the developer from leaking to an outside of the development device from between the edge portion and the frame member, and including a layer that includes an aggregate of a plurality of foam cells in which a foam cell communicating with an adjacent cell via a communication hole and a foam cell not communicating with the adjacent cell are mixed in the rotational axis direction, wherein a recessed portion is formed by a sheet member, the frame member, and the edge portion sealing member, and wherein an elastic sealing member is formed by filing thermal plastic resin into the recessed portion while filling a foam cell communicating with an adjacent cell via the communication hole with the thermal plastic resin.