Patent ID: 7593673
Filing Date: 2009-09-22
Classification: G03G

Abstract:
1. A developer supply cartridge, detachably mountable to an image forming apparatus in a mounting direction, for supplying a developer to a developer receiving cartridge, 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 first and second recesses which are disposed between adjacent ones of said opening portion and said closing portion respectively, and wherein said recesses are each defined by surfaces which are effective to rotate said shutter member in two rotational directions, and wherein said first recess is usable to close said shutter member while said developer supply cartridge is moving in the image forming apparatus in a direction opposed to the mounting direction, whereas said second recess is usable to close said shutter member while said developer supply cartridge is set stationarily in the image forming apparatus.