| 摘要 |
<p>A developing unit (4) circulates a developer unidirectionally and includes a developer carrier (5), a supply part (4c) having a supply screw (8), a collecting part (4a) having a collecting screw (6), an agitation part (4b) having an agitation screw (7), a first opening (12), a second opening (13), and a third opening (14). The developer is transported from the collecting screw (6) to the agitation screw (7) through the first opening (12), from the agitation (7) screw to the supply screw (8) through the second opening (13), from the supply screw (8) to the collecting screw (6) though the third opening (14) in a developer circulation. The developer flows down through at least one of the first opening (12) or the second opening (13).</p> |
