| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing device constituted so that a developing action can be stably executed without attaching carrier to an image carrier. SOLUTION: This developing is constituted by being provided with a magnetic field generation means consisting of plural magnetic poles N1, N2 and S1-S3 fixed on the inside of a turning developer carrier in order to carry and feed developer consisting of non-magnetic toner and the magnetic carrier. Besides, it is constituted so that an angle formed by the center of the magnetic flux density of the developing magnetic filed N1 in a vertical direction and a point where the magnetic flux density in the vertical direction becomes zero between the pole N1 and the post-developing carrying magnetic pole S1 is >=25 deg. and <=40 deg. and the maximum value of the magnetic flux density in a horizontal direction between the pole N1 and the pole S1 is >=750G. |
