| 摘要 |
PURPOSE:To form a non-magnetic one component developer thin layer which has been brought to charge electrostatically by friction sufficiently by using a non- magnetic control member, and a magnetic brush forming magnetic pole of the opposite side through a developer holding member at the upstream side. CONSTITUTION:Magnetic particles in a vessel form a magnetic brush 8 by a magnet 7a which is provided on the upstream side from a non-magnetic blade 6a of a control member, and on the opposite side through a sleeve 2 of a developer holding member. This brush 8 rotates and moves together with the sleeve 2, is obstructed by the blade 6a and raised, the brush 8 executes a circulating motion, and a non-magnetic one component developer is brought to charge electrostatically by friction. In this way, a non-magnetic one component developer thin layer which has been brought to charge electrostatically by friction sufficiently is formed on the sleeve 2 by the blade 6a. |
