| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in which: it has been difficult to ensure reliability in a filling process because an adjacent part adjacent to an inlet is deformed into a large wavy shape during the filling of developer.SOLUTION: A developer storage container is constituted by connecting a first flexible member having a three-dimensional shape, and a second flexible member forming a space to store a developer by covering a part of the first flexible member, with each other. Between the first flexible member and second flexible member, an inlet for injecting a developer into the developer storage container is provided. The inlet has an adjacent part having a three-dimensional shape adjacent thereto; and the adjacent part is provided with a folded shape, and when the inlet is opened, the adjacent part is unfolded in a direction having a component in a direction vertical to an injection direction of the developer in the inlet due to the folded shape. |
