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    • 2. 发明授权
    • Developer for electrostatic photography and process for preparation
thereof
    • 静电摄影用显影剂及其制备方法
    • US4264698A
    • 1981-04-28
    • US732759
    • 1976-10-15
    • Hiroshi TakayamaTatsuo Aizawa
    • Hiroshi TakayamaTatsuo Aizawa
    • G03G9/08G03G9/083G03G9/09G03G9/10G03G9/14
    • G03G9/0837G03G9/0904G03G9/10Y10T428/2998
    • A developer for electrostatic photography consisting essentially of a dry blend of (A) substantially spherical fixing magneto-sensitive particles of a composition comprising a binder medium and a fine powder of a magnetic material dispersed in the binder medium, the substantially spherical particles (A) have on their surfaces fine convexities and concavities formed by spraying a dispersion of the composition into a drying atmosphere and have a particle size of 2 to 44 microns, and (B) flowability- and electric resistance-controlling fine particles having a volume resistivity not higher than 10.sup.12 .omega.-cm and a particle size not larger than 1/10 of the particle size of the substantially spherical particles (A). The fine particles (B) are distributed predominantly on the surface portion of said spherical particles (A). The mixing weight ratio of (A):(B) is in the range of from 1000:1 to 50:1.
    • 用于静电摄影的显影剂,其基本上由(A)基本上球形的包含粘合剂介质的组合物的固体感磁性颗粒和分散在粘合剂介质中的磁性材料的细粉末的干混合物组成,基本上为球形的颗粒(A) 在其表面上具有通过将组合物的分散体喷雾到干燥气氛中并具有2至44微米的粒度而形成的细小的凸起和凹陷,以及(B)体积电阻率不高的流动性和电阻控制微粒 大于1012Ω·cm,粒径不大于基本上球形颗粒(A)的粒度的1/10。 细颗粒(B)主要分布在所述球形颗粒(A)的表面部分上。 (A):(B)的混合重量比在1000:1〜50:1的范围内。
    • 4. 发明授权
    • Magnetic dry developer for electrostatic photography and process for
preparation thereof
    • 用于静电摄影的磁性干燥显影剂及其制备方法
    • US4108786A
    • 1978-08-22
    • US641285
    • 1975-12-16
    • Hiroshi TakayamaTatsuo Aizawa
    • Hiroshi TakayamaTatsuo Aizawa
    • G03G9/08G03G9/083G03G9/14
    • G03G9/0825G03G9/0827G03G9/083G03G9/0838Y10S430/104
    • A magnetic toner for electrostatic photography consisting essentially of spherical particles of a composition comprising a fine powder of a magnetic material having an average particle size not exceeding 1000 m.mu. and being dispersed in a binder resin, said powdery magnetic material being present in an amount of 25 to 75% by weight based on the composition, spherical particles of said composition having such a particle size distribution that particles having a particle size larger than 44 .mu. occupy up to 10% of the total particles and particles having a particle size smaller than 2 .mu. occupy up to 10% of the total particles, wherein said fine powder of the magnetic material is distributed predominantly in the surface layer portion of each spherical particle and said spherical particles have a volume resistivity not higher than 1 .times. 10.sup.11 .OMEGA.-cm as measured in a magnetic field of about 680 gauss under a voltage of 1000 V.
    • 一种用于静电摄影的磁性调色剂,其基本上由包括平均粒度不超过1000μm的磁性材料的细粉末并分散在粘合剂树脂中的组合物的球形颗粒组成,所述粉末状磁性材料以 基于组合物为25〜75重量%,所述组合物的球形粒子具有粒径分布,粒径大于44μm的粒子占总粒子的10%,粒径小于2的粒子 mu占总粒子的10%,其中所述磁性材料的细粉末主要分布在每个球形颗粒的表面层部分中,并且所测量的球形颗粒的体积电阻率不高于1×1011欧姆 - 厘米 在1000V的电压下在约680高斯的磁场中。
    • 9. 发明授权
    • Charging member and charging device
    • 充电器和充电器
    • US06259875B1
    • 2001-07-10
    • US09373208
    • 1999-08-12
    • Hiroyuki MiuraHiroyuki KataokaHiroshi Takayama
    • Hiroyuki MiuraHiroyuki KataokaHiroshi Takayama
    • B03B1502
    • G03G15/0233Y10T428/25
    • A charging member has a conductive core, a conductive elastic layer formed on the surface of the conductive core, and a wearing surface layer to be used also as a resistance controlling layer formed on the surface of the conductive elastic layer, and comprising a surface layer-forming resin and a resistance controlling conductive filler, developing conductivity by electron conduction and having a specific wearing amount of 5.0×10−4 (mm3/N·km) or more, the charging member capable of preventing deterioration of the charging performance of a charging member caused by contamination of the surface layer of the charging member, and maintaining stable and satisfactory uniform charging property and image quality for a long period of time, and always keeping the surface clean by positively wearing the surface layer of the charging member.
    • 充电构件具有导电芯,形成在导电芯的表面上的导电弹性层和用作形成在导电弹性层的表面上的电阻控制层的磨损表面层,并且包括表面层 形成树脂和电阻控制导电填料,通过电子传导显影导电性,并且具有5.0×10 -4(mm 3 / N.km)以上的特定磨损量,该充电构件能够防止充电的充电性能的劣化 由充电构件的表面层的污染引起的构件,并且长时间保持稳定和令人满意的均匀充电性能和图像质量,并且通过正面地佩戴充电构件的表面层来始终保持表面清洁。
    • 10. 发明授权
    • Charging member and charging apparatus
    • 充电器和充电器
    • US6134408A
    • 2000-10-17
    • US386443
    • 1999-08-31
    • Hiroyuki KataokaHiroyuki MiuraHiroshi Takayama
    • Hiroyuki KataokaHiroyuki MiuraHiroshi Takayama
    • F16C13/00G03G15/02
    • G03G15/0233
    • The invention is to suppress a fluctuation in resistance of a charging member due to the environment and the applied voltage, and to suppress the charging potential of a photosensitive article to realize uniformity in charging by preventing generation of leakage at a part of a low resistance on the surface of the photosensitive article. The charging member may have a conductive core material, a conductive elastic layer formed on a surface of the conductive core material, and a resistance adjusting layer for adjusting a resistance between the conductive core material and the surface of the article to be charged, formed on a surface of the conductive core material, have a material for forming the resistance adjusting layer and a conductive filler for adjusting resistance that exhibits conductivity by electronic conduction, and having a volume resistivity of 5.times.10.sup.5 .OMEGA..multidot.cm or more at an electric field of 5.times.10.sup.4 V/cm.
    • 本发明是为了抑制由于环境和施加电压引起的充电部件的电阻波动,并且通过防止在低电阻部分产生泄漏来抑制感光制品的充电电位,从而实现充电均匀性 感光制品的表面。 充电构件可以具有导电芯材,形成在导电芯材的表面上的导电弹性层和用于调节导电芯材与待充电制品表面之间的电阻的电阻调节层,形成在 导电芯材的表面具有用于形成电阻调节层的材料和用于调节通过电子传导显示导电性的电阻的导电填料,并且在5×10 4 V / cm 2的电场下具有5×10 5欧姆×xcm以上的体积电阻率, 厘米。