Patent attributes
A developer supply container includes a developer accommodating chamber; a discharge opening; a fluid communication path connecting with the discharge opening; a pump portion having a volume changing with reciprocation and actable at least on the discharge opening; a regulating portion configured to regulate flow of the developer into an entrance region of the fluid communication path; a movable portion configured to move the regulating portion toward and away from the entrance of the fluid communication path; an air flow path provided inside the regulating portion to permit fluid communication between the pump portion and the discharge opening; and an elastic member provided between the regulating portion and the chamber adjacent to the entrance of the fluid communication path.
