| 摘要 |
A developing device includes a developing container, a feeding member including a blade, and a discharge opening for permitting discharge of an excessive developer, with supply of the developer, from the developing container. The blade is rotatable such that the blade moves downwardly at a side opposing to the discharge opening. A winding direction of the blade is such as to ascend toward the downstream with respect to the developer feeding direction, at the opposing side. A bottom end of the downstream edge of the discharge opening in a first cross-section taken perpendicularly to the rotation shaft is at a higher level than in a second cross-section at an upstream of the first cross-section with respect to the developer feeding direction. |
| 主权项 |
1. A developing device comprising:
a developing container for accommodating a developer; a feeding member, including a blade helically extending on a rotation shaft, for feeding the developer in said developing container along the rotation shaft by rotation thereof in a developer feeding direction; and a discharge opening for permitting discharge of an excessive developer, with supply of the developer, from said developing container, said discharge opening being provided in said developing container and being configured to open independently of an amount of the developer in said developing container, wherein said blade is rotatable such that said blade moves downwardly at a side opposing to said discharge opening, wherein a winding direction of said blade is such as to ascend toward the downstream with respect to the developer feeding direction, at the opposing side, and wherein a bottom end of the downstream edge of said discharge opening in a first cross-section taken perpendicularly to the rotation shaft is at a higher level than in a second cross-section at an upstream of the first cross-section with respect to the developer feeding direction. |
