| 摘要 |
A developing apparatus according to the present invention comprises a rotating developing sleeve, a developer supplying portion for supplying developer to the surface of the developing sleeve, a developer collecting portion for collecting the developer from the surface of the developing sleeve, the developer collecting portion and the developer supplying portion being vertically aligned, a pair of magnetic poles fixed in the developing sleeve, the pair of magnetic poles forming a triangle area which is surrounded by tangent lines at points where the magnetic poles have the maximum magnetic force, and a wall positioned between the developer supplying portion and the developer collecting portion, the edge of the wall being positioned in the triangle area formed by the pair of magnetic poles./!
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