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    Developer for electrophotography
    3.
    发明授权
    Developer for electrophotography 失效
    电子照相显影剂

    公开(公告)号：US5358819A

    公开(公告)日：1994-10-25

    申请号：US47649

    申请日：1993-04-13

    申请人： Yoshinori Urata ,  Toshihisa Ishida ,  Norio Tateishi ,  Shigeaki Tasaka ,  Naotaka Funayama

    发明人： Yoshinori Urata ,  Toshihisa Ishida ,  Norio Tateishi ,  Shigeaki Tasaka ,  Naotaka Funayama

    IPC分类号： G03G9/107 ,  G03G9/10

    CPC分类号： G03G9/107

    摘要： The object of the invention is to provide a developer for electrophotography which may present stable charging properties and image density after a prolonged period of copying operations as well as have a long life. The object can be achieved by providing a developer for electrophotography, compounded of: a toner component; and a carrier component prepared from a ferrite powder mixture in total of 100 parts, consisting of 10 to 90 parts by weight of a ferrite powder having a specific surface range of 200 to 230 cm.sup.2 /g, and 10 to 90 parts by weight of a ferrite powder having a specific surface range of more than 230 to 300 cm.sup.2 /g.

    摘要翻译： 本发明的目的是提供一种用于电子照相术的显影剂，其可以在长时间的复印操作之后呈现稳定的充电性能和图像密度，并且具有长的使用寿命。 该目的可以通过提供一种用于电子照相的显影剂来实现，该显影剂复合为：调色剂组分; 和由铁氧体粉末混合物共计100份制成的载体组分，由10至90重量份的比表面积为200至230平方厘米/克的铁氧体粉末和10至90重量份的 比表面积大于230〜300cm2 / g的铁氧体粉末。

    Electrophotographic toner and method of manufacturing same
    4.
    发明授权
    Electrophotographic toner and method of manufacturing same 失效
    电子照相墨粉及其制造方法

    公开(公告)号：US5981129A

    公开(公告)日：1999-11-09

    申请号：US25113

    申请日：1998-02-17

    申请人： Yoshiaki Akazawa ,  Toshihiko Murakami ,  Tatuo Imafuku ,  Takeaki Ohuchi ,  Yasuharu Morinishi ,  Satoshi Ogawa ,  Tadashi Nakamura ,  Hitoshi Nagahama ,  Toshihisa Ishida

    发明人： Yoshiaki Akazawa ,  Toshihiko Murakami ,  Tatuo Imafuku ,  Takeaki Ohuchi ,  Yasuharu Morinishi ,  Satoshi Ogawa ,  Tadashi Nakamura ,  Hitoshi Nagahama ,  Toshihisa Ishida

    IPC分类号： G03G9/08 ,  G03G9/093

    CPC分类号： G03G9/081 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/093 ,  G03G9/09307 ,  G03G9/09321 ,  G03G9/0935 ,  G03G9/09364 ,  G03G9/09392

    摘要： An electrophotographic toner is made up of toner particles composed of irregularly-shaped core particles made chiefly of binder resin, and surface-modifying fine particles which are first dispersed over and attached to the surface of the core particles, and then affixed or formed into a film thereon. The BET specific surface area, based on N.sub.2 adsorption, of the toner particles is less than 0.64 times the BET specific surface area of the core particles and surface-modifying fine particles combined together. Further, this value is 1.07 times the BET specific surface area of hypothetical toner particles which are perfect spheres. Consequently, the toner is not prone to problems such as filming, toner scattering, and fogging which are caused by peeling, separation, etc. of the surface-modifying fine particles, nor to poor cleaning due to spherical toner particles. Further, since the toner is manufactured with a quantitative grasp of the state of modification of the surface of the core particles by the surface-modifying fine particles, it is a toner in a stable state.

    摘要翻译： 电子照相调色剂由主要由粘合剂树脂制成的不规则形状的核心颗粒和首先分散在核颗粒表面上并附着在核颗粒表面上的表面改性微粒组成的调色剂颗粒组成，然后固定或形成为 膜上。 调色剂颗粒的基于N2吸附的BET比表面积小于核心颗粒的BET比表面积和结合在一起的表面改性微粒的0.64倍。 此外，该值是完美球体的假想调色剂颗粒的BET比表面积的1.07倍。 因此，调色剂不容易出现由表面改性微粒的剥离，分离等引起的成膜，调色剂飞散和起雾等问题，也不会由于球形调色剂颗粒而导致不良清洁。 此外，由于调色剂通过表面改性细颗粒对芯颗粒的表面的修饰状态的定量掌握来制造，所以它是调色剂处于稳定状态。

    Toner used for electrophotography
    5.
    发明授权
    Toner used for electrophotography 失效
    用于电子照相的调色剂

    公开(公告)号：US6103439A

    公开(公告)日：2000-08-15

    申请号：US060500

    申请日：1998-04-15

    申请人： Satoshi Ogawa ,  Hitoshi Nagahama ,  Yasuharu Morinishi ,  Tatsuo Imafuku ,  Takeaki Ohuchi ,  Toshihisa Ishida ,  Tadashi Nakamura

    发明人： Satoshi Ogawa ,  Hitoshi Nagahama ,  Yasuharu Morinishi ,  Tatsuo Imafuku ,  Takeaki Ohuchi ,  Toshihisa Ishida ,  Tadashi Nakamura

    IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/097

    CPC分类号： G03G9/08797 ,  G03G9/081 ,  G03G9/0825

    摘要： In toner 1 containing a binder resin 2, wax particles 3 and a coloring agent, the wax particles 3 are designed so that the ratio of major axis/minor axis is set in the range of 1.4 to 4.0 and so that the major axis L is not more than 6.0 .mu.m. Moreover, the melt index of the binder resin ranges from 5.0 to 11.0, and the dielectric loss tangent (tan .delta.) is not more than 5.0. This arrangement prevents the wax particles 3 inside the toner 1 or at the toner 1 surface layer from exposing to or sticking out of the toner 1 surface, thereby making it possible to provide a superior offset-reducing property during the fixing process and electrophotographing toner that can reduce wax contamination on the surface of the toner-bearing body.

    摘要翻译： 在含有粘合剂树脂2，蜡颗粒3和着色剂的调色剂1中，蜡颗粒3被设计成使得长轴/短轴的比率设定在1.4至4.0的范围内，并且使得长轴L为 不超过6.0亩。 此外，粘合剂树脂的熔融指数为5.0〜11.0，介电损耗角正切（tanδ）为5.0以下。 这种布置防止调色剂1内或调色剂1表面层上的蜡颗粒3暴露于或从调色剂1表面露出，从而使得可以在定影过程中提供优异的抵消减小性能和电子照相调色剂， 可以减少调色剂承载体的表面上的蜡污染。

    Toner, Developer, and process for producing the same
    8.
    发明授权
    Toner, Developer, and process for producing the same 失效
    调色剂，开发者及其生产工艺

    公开(公告)号：US6004713A

    公开(公告)日：1999-12-21

    申请号：US48398

    申请日：1998-03-26

    申请人： Yoshinori Urata ,  Hitoshi Nagahama ,  Yasuharu Morinishi ,  Satoshi Ogawa ,  Toshihisa Ishida ,  Tadashi Nakamura ,  Takahiro Bito

    发明人： Yoshinori Urata ,  Hitoshi Nagahama ,  Yasuharu Morinishi ,  Satoshi Ogawa ,  Toshihisa Ishida ,  Tadashi Nakamura ,  Takahiro Bito

    IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G9/00

    CPC分类号： G03G9/09741 ,  G03G9/081

    摘要： A process for preparing a toner includes forming a melt-kneaded mixture by mixing a raw material mixture containing a quaternary ammonium salt compound at a temperature ranging from (M-7).degree. C. to (M+7).degree. C., where M is a melting point of the quaternary ammonium salt compound, with a kneading device having a discharge port whose temperature is set lower than a temperature at which a melt viscosity of the melt-kneaded mixture at the discharge port is not higher than 10,000 Pa.a, removing the melt-kneaded mixture from the kneading device, rolling out the melt-kneaded mixture to a thickness ranging from 1.2 mm to 3.0 mm, and cooling down the melt-kneaded mixture. With the use of the toner produced by this process, the amount of charge during copying is retained in an appropriate range irrespectively of the working atmosphere and conditions of use, thereby maintaining a good image density.

    摘要翻译： 制备调色剂的方法包括通过在（M-7）℃至（M + 7）℃的温度范围内混合含有季铵盐化合物的原料混合物来形成熔融捏合的混合物，其中M 是季铵盐化合物的熔点，其捏合装置具有一个排出口，该排出口的温度设定为低于排出口处的熔融捏合混合物的熔融粘度不高于10,000Pa·a 从捏合装置中除去熔融捏合的混合物，将熔融捏合的混合物推出至1.2mm至3.0mm的厚度，并冷却熔融捏合的混合物。 通过使用通过该方法生产的调色剂，复印期间的电荷量保持在适当的范围内，而与工作气氛和使用条件无关，从而保持良好的图像浓度。

    Electrophotographic printing-use toner
    9.
    发明授权
    Electrophotographic printing-use toner 失效
    电子照相打印用墨粉

    公开(公告)号：US5976751A

    公开(公告)日：1999-11-02

    申请号：US57049

    申请日：1998-04-08

    申请人： Yasuharu Morinishi ,  Tadashi Nakamura ,  Hitoshi Nagahama ,  Satoshi Ogawa ,  Toshihisa Ishida ,  Takeaki Ohuchi

    发明人： Yasuharu Morinishi ,  Tadashi Nakamura ,  Hitoshi Nagahama ,  Satoshi Ogawa ,  Toshihisa Ishida ,  Takeaki Ohuchi

    IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G9/10

    CPC分类号： G03G9/10 ,  G03G9/08 ,  G03G9/097 ,  G03G9/09708

    摘要： The present invention provides electrophotographic printing-use toner capable of producing a quality image, without depending on excessive addition of a fluidizing agent, even after maintained at high temperature which causes toner to aggregate. The electrophotographic printing-use toner constituting two-component developer with magnetic powder carrier, made of a toner mother particle including binding agent synthetic resin and a coloring agent, whose surface is added with a fluidizing agent is manufactured so that a ratio of .DELTA.Q.sub.h /.DELTA.Q.sub.s is not less than 0.37, more preferably not less than 0.45, where .DELTA.Q.sub.s is a charging rate of the toner mother particle, at a start of mixing with respect to the magnetic powder carrier, maintained at normal temperature, and .DELTA.Q.sub.h is a charging rate of the toner mother particle, at the start of mixing, maintained under a condition of temperature and time which causes the electrophotographic printing-use toner to aggregate.

    摘要翻译： 本发明提供了即使在保持在高温下也能够产生质量图像的电子照相印刷用调色剂，而不依赖于过量添加流化剂，这导致调色剂聚集。 用表面添加有流化剂的由粘合剂合成树脂和着色剂构成的调色剂母粒构成的由磁性粉末载体构成的双组分显影剂的电子照相印刷用调色剂被制造成使得DELTA Qh / DELTA Qs不小于0.37，更优选不小于0.45，其中DELTA Qs是调色剂母粒的充电速率，在相对于磁性粉末载体的混合开始时保持在常温，DELTA Qh为 在混合开始时调色剂母粒的充电速率在使得电子照相印刷用调色剂聚集的温度和时间的条件下保持。

    Electrophotographic developing unit
    10.
    发明授权
    Electrophotographic developing unit 有权
    电子照相显影单元

    公开(公告)号：US06317576B1

    公开(公告)日：2001-11-13

    申请号：US09488645

    申请日：2000-01-21

    申请人： Toshihisa Ishida ,  Hitoshi Nagahama ,  Katsuaki Sumida ,  Takahiro Bito ,  Keizo Kitamura

    发明人： Toshihisa Ishida ,  Hitoshi Nagahama ,  Katsuaki Sumida ,  Takahiro Bito ,  Keizo Kitamura

    IPC分类号： G03G1509

    CPC分类号： G03G15/09

    摘要： A magnetic member is arranged at a position on the downstream side with respect to the rotational direction of a developing sleeve, outside the developer conveyance path where the magnetism from the magnetic member has no influence on the magnetic field of the developing magnetic pole. When the magnetic member is arranged with its N pole facing the developing sleeve, the magnetic attractive force from the magnetic member weakens the developer's attraction to the peripheral surface of the developing sleeve. When the magnetic member is arranged with its S pole facing the developing sleeve, the developer being conveyed along the developer conveyance path is magnetized in such a direction as to repel the peripheral surface of the developing sleeve. In either case, the adhering state of the developer to the peripheral surface of the developing sleeve having passed through the developing position is unstable, so that the developer having adhered to the developing sleeve will easily drop off from the developing sleeve after passage of the developing position.

    摘要翻译： 磁性构件相对于显影套筒的旋转方向在下游侧的位置处布置在显影剂输送路径的外侧，其中磁性构件的磁性对显影磁极的磁场没有影响。 当磁性构件以其N极面向显影套筒布置时，来自磁性构件的磁性吸引力削弱了显影剂对显影套筒周边表面的吸引力。 当磁性构件以其S极面向显影套筒布置时，沿着显影剂输送路径输送的显影剂沿着排斥显影套筒的周面的方向被磁化。 在任一种情况下，显影剂到已经通过显影位置的显影套筒的周面的粘附状态是不稳定的，使得附着在显影套筒上的显影剂在显影剂通过后容易从显影套筒脱落 位置。