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    • 8. 发明授权
    • Developing apparatus
    • 开发设备
    • US07379693B2
    • 2008-05-27
    • US11402022
    • 2006-04-12
    • Kenya OgawaYasushi ShimizuShuji MoriyaKazunari HagiwaraNaoto KichijimaKoichi Okuda
    • Kenya OgawaYasushi ShimizuShuji MoriyaKazunari HagiwaraNaoto KichijimaKoichi Okuda
    • G03G15/09
    • G03G15/0921
    • A developing apparatus having a rotatable developing sleeve having an elastic layer on the surface thereof for carrying a mono-component magnetic developer and urged against a photosensitive drum to develop an electrostatic image formed on the drum with the developer, a non-rotary magnet provided inside the sleeve for magnetically attracting the developer to the sleeve, and a blade having an abutting portion abutting against the sleeve in a counter direction for regulating the amount of the developer on the sleeve, a step portion spaced apart from the abutting portion, and a separating portion provided upstream of the step portion in the rotation direction of the sleeve, wherein the surface of the sleeve to which the separating portion is opposed includes a position satisfying |Br|/|B|≧0.5, where B(G): the magnitude of magnetic flux density formed on the surface of the sleeve, and Br(G): a component of the magnetic flux density in a direction perpendicular to the surface of the sleeve.
    • 一种具有可旋转显影套筒的显影装置,其表面上具有弹性层,用于承载单组分磁性显影剂并且被推压到感光鼓上以使显影剂形成在鼓上形成静电图像,内部设置有非旋转磁体 用于将显影剂磁性地吸引到套筒的套筒,以及具有抵靠部件的反向部分的对置部分的对置部分,用于调节套筒上显影剂的量,与抵接部分间隔开的台阶部分, 在所述套筒的所述旋转方向上游侧设置有所述套筒的与所述分离部相对的表面的位置包括满足| Br | / | B |> = 0.5的位置,其中B(G): 在套筒表面上形成的磁通密度的大小和Br(G):垂直于套筒表面的方向上的磁通密度的分量 。