DEVELOPER SUPPLY CONTAINER, DEVELOPER SUPPLYING SYSTEM AND IMAGE FORMING APPARATUS

摘要

Conventionally, when replenishing a developer from a developer replenishing container to a developer receiving device using air, a filter has been provided to the developer receiving device side, but when using a force feed method to continue to send a mixed gas of air and developer from the developer replenishing container to the developer receiving device, there has been the problem of filter clogging. The present invention provides the developer replenishing container side with a pump unit that can operate in a manner so as to perform: a suction operation that moves air within a developer receiving unit towards a developer holding unit; and a discharging operation that moves air within the developer holding unit towards the developer receiving unit. As a result, a backwashing effect that clears off developer from the filter acts on the filter unit during the suction operation, suppressing clogging of the filter.