| 摘要 |
PROBLEM TO BE SOLVED: To prevent developer from clogging due to the resistance of a flow channel when the developer is replenished from a developer replenishment container to an apparatus body of an image forming apparatus.SOLUTION: A developer replenishment container can be removably attached to an apparatus body of an image forming apparatus for replenishing developer to the apparatus body, and includes a container frame body, a developer storage bag that is included in the container frame body, has elastic restoring force, and accommodates developer, and a developer exhaust passage for exhausting the developer accommodated in the developer storage bag to the outside of the developer replenishment container, where the container frame body and developer storage bag have a space therebetween to constitute an airtight chamber. The developer replenishment container further includes negative pressure maintaining and releasing means capable of maintaining and releasing a negative pressure state in which the developer storage bag is shrunk due to the elastic restoring force of the developer storage bag and thereby the pressure in the airtight chamber becomes lower than the pressure outside the developer replenishment container. |
