| 摘要 |
PROBLEM TO BE SOLVED: To prevent soiled images, etc., by steadily conveying developer on a developer carrier and preventing scattered toner which occurs when an amount of developer is restricted near a nipping pole. SOLUTION: The developing device includes: the developer carrier 41 which conveys two-component developer composed of magnetic carrier and non-magnetic toner; and a developer layer thickness restricting member 42 formed of a magnetic member 42A and a non-magnetic member 42B, which restricts the two-component developer on the developer carrier 41 to a specific amount. In the developing device, a gap differenceΔH(mm) between a first gap H1 left between the surface of the developer carrier 41 and the leading end of the magnetic member 42A, and a second gap H2 left between the surface of the developer carrier 41 and the leading end of the non-magnetic member 42B, and the particle diameter Dc(μm) of the magnetic carrier, establish the following condition: 0<ΔH≤1.46×10<SP>-3</SP>×Dc+0.234. COPYRIGHT: (C)2004,JPO |
