Patent ID: 8131183

Claim:
A developer collection container comprising: a developer storing portion for storing a developer, said developer storing portion having an elongated shape and having first and second end portions in a longitudinal direction thereof; a developer supply opening provided on said first end portion of said developer storing portion through which the developer is supplied into said developer storing portion, and a rotation member rotatably provided in said developer storing portion so as to extend substantially from said first end portion to said second end portion in said longitudinal direction of said developer storing portion, said rotation member rotating in a predetermined direction so as to convey the developer in a direction from said first end portion to said second end portion along said longitudinal direction, and a conveying power with which said rotation member conveys the developer in a first region closer to said first end portion being larger than a conveying power with which said rotation member conveys the developer in a second region closer to said second end portion, a ratio of said first region to said second region being in a range from 7:5 to 7:2.