摘要 |
The present invention provides a developing apparatus to be provided in a quick start up electrophotographic image forming apparatus that can efficiently prevent generation of unevenness by a screw pitch in a short period of time. The developing apparatus rotates a developer transporting screw so as to transport and supply a developer to a developer bearing member, and develops a latent image formed on an image bearing member by the developer. The developer transporting screw includes a vane winding around a rotation shaft in a spiral form. A vane surface on other side of a developer transport direction of the vane includes two planes having different angles with a rotational center line of the rotation shaft. Relationships of theta 2<theta1 and 10°<=theta 2 <=60° are satisfied, where theta 1 denotes an angle between: the plane that has a longer distance from the rotational center line; and the rotational center line, and theta 2 denotes an angle between: the face that has a shorter distance from the rotational center line; and the rotational center line.
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