| 摘要 |
PROBLEM TO BE SOLVED: To provide a developer replenishing container which has high dimensional stability against the temperature rise in the image forming apparatus body even if its developer container is partly made by a stretching blow molding method, and which is able to normally carry out mechanical functions such as for opening or closing the replenishing port and supplying the developer.SOLUTION: The developer replenishing container has its replenishing port-sealing member and the developer container both engaging with the image forming apparatus body respectively, and opens or closes the replenishing port by relatively moving the port-sealing member and the developer container. The developer container is manufactured by stretching blow molding at least a part of the preform molded by injection molding. The developer replenishing container is made of a mixture of a polyethylene terephthalate resin and a polyethylene naphthalate resin, and the content of the polyethylene naphthalate resin in the mixture is 7.5 to 25 mass%. |
