Patent ID: 8160471

Claim:
A developer supply container detachably mountable to an image forming apparatus, said developer supply container comprising: a rotatable container body provided with an inside space containing a developer, said container body further provided with a portion-to-be-engaged on an inner surface of said container body; an opening, provided at one end of said container body with respect to a direction of a rotational axis of said container body, configured and positioned to permit discharging of the developer from the inside space; a sealing portion configured and positioned to seal said opening, said sealing portion being movable relative to said container body in the rotational axis direction between a sealing position for sealing said opening and an unsealing position for unsealing said opening; an extended portion extended from said sealing portion toward an inside of said container body and movable integrally with said sealing portion in the rotational axis direction, said extended portion being displaceable toward the rotational axis; an engaging portion provided at a free end portion of said extended portion and engageable with said portion-to-be-engaged; and a limiting portion movable between a limiting position in which displacement of said extended portion toward the rotational axis is limited to substantially hold said sealing portion in the sealing position by engagement between said engaging portion and said portion-to-be-engaged, and a regulation release position in which displacement of said extended portion toward the rotational axis is permitted to permit the relative movement of said sealing portion by disengagement between said engaging portion and said portion-to-be-engaged.