Patent ID: 8532522

Claim:
A toner cartridge comprising: a toner container formed with an opening, and configured to contain a toner therein; and an engaging member comprising a discharge opening and a ring-shaped seal member disposed on a seal member installation surface provided in the engaging member, the engaging member being engaged with the toner container so as to cover the opening of the toner container and rotatably mounted to the toner container while an edge of the opening of the toner container is frictionally slid on a surface of the ring-shaped seal member, wherein the toner container is configured to convey the toner contained therein into the engaging member through the opening and discharge the toner from the engaging member, as the toner container is rotated, and wherein the seal member includes a non-contact portion arranged at a surface thereof which faces the seal member installation surface, the non-contact portion being free from any contact with the seal member installation surface, so that the engaging member includes a space extending from the surface of the seal member on which the edge of the opening is frictionally slid to the non-contact portion in the engaging member, wherein an adhesive member is provided, and the adhesive member is configured to bond the seal member to the seal member installation surface, and wherein a shape retaining member configured to retain a shape of the seal member is provided between the seal member and the adhesive member.