Patent ID: 7483660

Claim:
A developer supply container detachably mountable to an image forming apparatus, comprising: a container body for accommodating a developer, said container body including an arcuate portion and an extension extending from said arcuate portion; a discharge opening, formed in said arcuate portion for discharging the developer from said container body; and a stirring member including: a rotation shaft provided such that a center of rotation thereof is aligned with a center of said arcuate portion; a stirring blade, mounted on said rotation shaft, for stirring the developer in said container body, said stirring blade being of a length, which is long enough to be in contact with such a portion of an inside surface of said extension as is most remote from said center of rotation during rotation of said rotation shaft; and a feeding blade, mounted on said rotation shaft, for feeding the developer in said container body toward said discharge opening, said feeding blade being of a length, which is not long enough to contact with the most remote portion but long enough to contact with an inside surface of said arcuate portion during rotation of said shaft.