| 摘要 |
A developing unit according to the present invention comprises a member interposed between adjacent first and second magnetic poles in a developer supply roller and arranged close to the second pole and to the surface of said developer supply roller, for generating a magnetic field between the second magnetic pole and the member to form a curtain of developers, peeling the developers from the surface of the developer supply roller, and separating the developers supplied by the developer supply roller and the developers peeled from the surface of the developer supply roller from the developer supply roller in the horizontal direction.
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