Patent ID: 7496321
Filing Date: 2009-02-24
Classification: G03G

Abstract:
1. A developer supply cartridge, detachably insertable into an image forming apparatus in a direction, for supplying a developer to a developer receiving cartridge including first and second engaging members arranged in the direction, said developer supply cartridge comprising: a developer container configured to contain the developer, said developer container having a discharge opening for permitting discharge of the developer from said developer container; and a shutter member configured and positioned to open and close said discharge opening by rotation about a rotation center thereof, wherein said shutter member includes a plurality of sets of an opening portion for opening said discharge opening and a closing portion for closing said discharge opening which are alternately disposed in a rotational direction of said shutter member and a plurality of recesses which are disposed between adjacent ones of said opening portion and said closing portion respectively, and said recesses each having respective surfaces which are effective to rotate said shutter member in two rotational directions, and wherein when said developer supply cartridge and the developer receiving cartridge are set into the image forming apparatus, two of said recesses are in such a position or relationship as are engageable with the first and second engaging members, respectively, and one of said two recesses is capable of being used in an opening movement and a closing movement of said shutter member, and the other one is capable of being used in the closing movement of said shutter member.