Patent ID: 9182733
Filing Date: 2015-11-10
Classification: G03G

Abstract:
1. A developer supply cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image on a recording material by a developer, said developer supply cartridge comprising: an accommodating portion, provided with a supply opening for permitting discharge of a developer, for accommodating the developer; a shutter portion movable between a closed position where the supply opening of said accommodating portion is blocked from an outside of said accommodating portion and an open position where the supply opening is open to the outside; and a movable portion for moving said shutter portion, wherein said movable portion is movable between a first position where said shutter portion is positioned in the closed position and a second position where said shutter portion is positioned in the open position, and wherein during movement of said developer supply cartridge to a mounting position when said developer supply cartridge is mounted to the main assembly, said movable portion is moved with the movement of said developer supply cartridge by engagement thereof with a first engaging portion provided in a main assembly side so that said movable portion is engaged with the first engaging portion in the first position to start movement thereof and is positioned in the second position when said developer supply cartridge reaches the mounting position, wherein when said movable portion is positioned in a position other than the first position before being engaged with the first engaging portion, said movable portion is moved, until being engaged with the first engaging portion, to the first position by engagement thereof with a second engaging portion provided in the main assembly side.