Patent ID: 8422910

Claim:
A sealing member for unsealably sealing a toner opening of a toner or developer container mountable to an image forming apparatus, comprising: (a) a base member having a center, a first surface and a second, opposite surface, a first cylindrical portion protruding away from the second, opposite surface and a second cylindrical portion protruding away from the first cylindrical portion axially; (b) a first coupling engagement portion protruding away from the first surface of the base member axially, wherein the first coupling engagement portion is formed with a curved, first end portion at an end distal from the first surface and a second end portion at an end proximate to the first surface, and wherein the first coupling engagement portion further comprises an engaging projection projected radially outwardly from the peripheral surface of the first coupling engagement portion; (c) a second coupling engagement portion protruding away from the first surface of the base member axially, wherein the second coupling engagement portion is formed with a curved, first end portion at an end distal from the first surface and a second end portion at an end proximate to the first surface, and wherein the second coupling engagement portion further comprises an engaging projection projected radially outwardly from the peripheral surface of the second coupling engagement portion, and wherein the first coupling engagement portion and the second coupling engagement portion are formed symmetrically around an axial axis A passing through the center of the base member; and (d) a central member protruding away from the first surface of the base member axially, wherein the central member has a cylindrical portion defining an opening therein, and at least one supporting member projected radially outwardly from the peripheral surface of the cylindrical portion, wherein the central member is formed to be concentric with the base member axially and positioned between the first coupling engagement portion and the second coupling engagement portion.