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    • 7. 发明申请
    • DEVELOPING APPARATUS
    • 开发设备
    • US20110026978A1
    • 2011-02-03
    • US12904007
    • 2010-10-13
    • Shinichi NishidaKatsunori YokoyamaYasushi ShimizuKazunari HagiwaraKatsuhiro SakaizawaRie EndoNaoto Kichijima
    • Shinichi NishidaKatsunori YokoyamaYasushi ShimizuKazunari HagiwaraKatsuhiro SakaizawaRie EndoNaoto Kichijima
    • G03G15/08
    • G03G15/0812
    • An amount-of-developer regulating apparatus configured to restrict the amount of developer carried on a developer bearing member. The amount-of-developer regulating apparatus includes a flexible developer amount regulation member having a contact portion configured to contact with a developer bearing member, and first and second holding portions configured to hold the developer amount regulation member and to contact with the developer amount regulation member at further upstream and further downstream in a direction where the developer bearing member is rotationally moved than the contact portion. With a pressure distribution of the contact portion as to the developer bearing member, there are a plurality of local maximum values in the direction where the developer bearing member is rotationally moved. Thus, the apparatus can be reduced in size, and also image concentration unevenness after long-term use can be prevented.
    • 一种显影剂调节装置,其被配置为限制承载在显影剂承载部件上的显影剂的量。 显影剂量调节装置包括柔性显影剂量调节构件,其具有构造成与显影剂承载构件接触的接触部分,以及构造成保持显影剂量调节构件并与显影剂量调节剂接触的第一和第二保持部分 构件在显影剂承载构件比接触部分旋转移动的方向的更上游和更下游。 通过接触部分对显影剂承载部件的压力分布,在显影剂承载部件被旋转移动的方向上存在多个局部最大值。 因此,可以减小装置的尺寸,并且可以防止长期使用后的图像浓度不均匀。
    • 10. 发明授权
    • Developing apparatus featuring image defect supression
    • 具有图像缺陷抑制功能的显影装置
    • US07440718B2
    • 2008-10-21
    • US11275729
    • 2006-01-26
    • Kazunari HagiwaraKenya OgawaShuji MoriyaNaoto KichijimaYasushi ShimizuKoichi Okuda
    • Kazunari HagiwaraKenya OgawaShuji MoriyaNaoto KichijimaYasushi ShimizuKoichi Okuda
    • G03G15/09
    • G03G15/0812G03G15/0914G03G2215/0634
    • A developing apparatus having a developing sleeve provided with an elastic layer on its surface, and for developing an electrostatic image formed on an image bearing member with a mono-component magnetic toner having a mean degree of circularity of 0.965 or greater, a magnet provided in the developing sleeve, and a blade for regulating the amount of the developer carried on the developing sleeve satisfies the expressions |Br|/|B|≧0.5 and Nsb/(Bs×R)≦0.5, where B (G) is magnetic flux density formed on the surface of the developing sleeve by the magnet at the contact position between the blade and the developing sleeve, Nsb (mm) is the contact width between the blade and the developing sleeve, Br (G) is a component of magnetic flux density B (G) in a direction perpendicular to the surface of the developing sleeve, Bs (rad) is a half value width of the perpendicular component of the magnetic flux density of the nearest one of the magnetic poles of the magnet to the contact position on the surface of the developing sleeve, and R (mm) is the radius of the developing sleeve.
    • 一种显影装置,具有在其表面上设置有弹性层的显影套筒,并且利用平均圆形度为0.965以上的单组分磁性调色剂在图像承载部件上形成静电图像,所述静电图像设置在 显影套筒和用于调节在显影套筒上承载的显影剂量的刀片满足表达式| Br | / | B |> = 0.5和Nsb /(BsxR)<= 0.5,其中B(G)是磁通量 通过磁体在叶片和显影套筒之间的接触位置处形成在显影套筒的表面上的密度Nsb(mm)是刀片和显影套筒之间的接触宽度,Br(G)是磁通量的分量 密度B(G)在垂直于显影套筒表面的方向上的距离Bs(rad)是磁体的最接近的一个磁极与接触位置的磁通密度的垂直分量的半值宽度 在上 显影套筒的表面,R(mm)是显影套筒的半径。