Developer supply system, installation method of developer supply tank and developer supply unit

摘要

This developer replenishment container is attachable to and detachable from a developer receiving device that comprises a developer receiving section wherein a receiving port for receiving developer is formed, and comprises an engaged section 11b integrally displaceable with the developer receiving section. The developer replenishment container comprises a discharge section wherein a shutter opening for discharging developer accommodated in a developer accommodation section is formed. After the developer replenishment container is mounted to a prescribed position on the developer receiving device, an operation part 21 performs a prescribed operation to engage an engaging section 21d with the engaged section 11b, thereby causing the developer receiving section to be displaced such that the receiving port is in communication with the shutter opening.