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    • 5. 发明授权
    • Image forming apparatus that effectively charges a latent image carrier
    • 对潜像载体进行充电的图像形成装置
    • US07627270B2
    • 2009-12-01
    • US11625669
    • 2007-01-22
    • Tetsumaru Fujita
    • Tetsumaru Fujita
    • G03G15/02
    • G03G15/0216G03G2215/025
    • A charging device for applying a voltage to a latent image carrier of an image forming apparatus includes a brush roller, a voltage applying mechanism, and a driving mechanism. The brush roller includes a shaft and a brush. The brush has an oblique brush amount, and is disposed on an outer surface of the shaft while being disposed to a surface of the latent image carrier such that the brush roller is abutted with a brush contact amount. This brush is configured to uniformly charge the surface of the latent image carrier. The voltage applying mechanism is configured to apply a charging voltage to the brush roller. The driving mechanism is configured to drive the brush roller at a predetermined rotation number to satisfy a relationship Z>150−50 A, where Z is a rotation number (rpm) of the brush roller, and A is the oblique brush amount (mm).
    • 用于向图像形成装置的潜像载体施加电压的充电装置包括刷辊,电压施加机构和驱动机构。 刷辊包括轴和刷子。 刷子具有倾斜的刷子量,并且设置在轴的外表面上,同时设置在潜像载体的表面上,使得刷辊与刷接触量抵接。 该刷被配置为对潜像载体的表面均匀充电。 电压施加机构构成为向刷辊施加充电电压。 驱动机构构成为以规定的转数驱动刷辊,以满足Z> 150〜50A的关系,其中Z为刷辊的旋转数(rpm),A为斜刷量(mm) 。
    • 6. 发明授权
    • Charging unit, process unit including the same, and image forming apparatus including the same
    • 充电单元,包括该充电单元的处理单元和包括该充电单元的成像设备
    • US07539442B2
    • 2009-05-26
    • US11759051
    • 2007-06-06
    • Yuji NagatomoTetsumaru Fujita
    • Yuji NagatomoTetsumaru Fujita
    • G03G15/02
    • G03G15/0216
    • A charging unit available in a process unit detachably attached to an image forming apparatus includes a charging member configured to uniformly charge a surface of an image carrying member while contacting the image carrying member, and a charge bias applying unit configured to apply a charge bias superimposing a direct current voltage on an alternating current voltage to the charging member. The alternating current voltage satisfies a relational expression of “Vpp×0.4/t≦8.8×103”, “Vpp” representing a peak-to-peak voltage of the alternating current voltage in the charge bias, and “t” representing a time period from a first point of a swing of a wave component starting to swing by a large amount to a same polarity as the direct current voltage of the charge bias to a second point of the swing of the wave component reaching approximately 80% of an amplitude of the wave component.
    • 可拆卸地附接到图像形成装置的处理单元中的充电单元包括充电构件,其被配置为在与图像承载构件接触的同时对图像承载构件的表面进行均匀充电;以及充电偏压施加单元,被配置为施加电荷偏置叠加 对充电部件的交流电压的直流电压。 交流电压满足表示充电偏压中的交流电压的峰 - 峰电压的“Vppx0.4 / t <= 8.8×103”,“Vpp”的关系式,表示时间段的“t” 从波动分量的摆动的第一点开始大量旋转到与充电偏压的直流电压相同的极性,到波分量的摆动的第二点达到幅度的大约80% 波分量。
    • 8. 发明授权
    • Developing device
    • 开发设备
    • US06782226B2
    • 2004-08-24
    • US10367843
    • 2003-02-19
    • Junji MachidaHidetoshi MiyamotoTetsumaru FujitaMasahiko MatsuuraYoshiko YaoiMakoto ShimazoeShuichi Nakagawa
    • Junji MachidaHidetoshi MiyamotoTetsumaru FujitaMasahiko MatsuuraYoshiko YaoiMakoto ShimazoeShuichi Nakagawa
    • G03G1508
    • G03G15/0808G03G2215/0619
    • A developing device includes a toner bearing member holding a toner on its surface for conveyance of the toner to a development region where the toner bearing member opposes an image bearing member via a predetermined gap therebetween; a regulating member pressed against the surface of the toner bearing member for regulation of the amount of toner conveyed to the development region; and a developing bias source for applying an alternating electric field between the toner bearing member and the image bearing member. The developing device features the use of the toner bearing member including a conductive substrate formed with an elastic layer, an intermediate layer and a surface layer on the surface thereof, respective volume resistances &rgr;1, &rgr;2 and &rgr;3 of which layers satisfy a condition &rgr;2≦&rgr;1≦&rgr;3, the toner bearing member having an arithmetic average surface roughness in the range of 0.8 to 2.5 &mgr;m, and the use of the toner having a volume-average particle size of 3 to 8 &mgr;m.
    • 显影装置包括在其表面上保持调色剂的调色剂承载构件,用于将调色剂输送到显影区域,在该显影区域,调色剂承载构件经由图像承载构件经由其间的预定间隙对置; 调节构件压靠在调色剂承载构件的表面上,用于调节传送到显影区域的调色剂的量; 以及用于在调色剂承载构件和图像承载构件之间施加交变电场的显影偏压源。 显影装置的特征在于使用调色剂承载部件,该调色剂承载部件包括形成有表面的弹性层,中间层和表面层的导电性基板,其各层满足条件rho2 <= 1的各自的体积电阻rho1,rho2和rho3, RHO1&LE; RHO3,具有0.8〜2.5μm的算术平均表面粗糙度的调色剂承载构件,以及使用体积平均粒径为3〜8μm的调色剂。