公开(公告)号：US6110635A

公开(公告)日：2000-08-29

申请号：US150738

申请日：1998-09-10

申请人： Yoshinori Urata ,  Tatsuo Imafuku ,  Toshihisa Ishida ,  Takahiro Bito ,  Tadashi Nakamura ,  Yoshiaki Akazawa ,  Yasuharu Morinishi ,  Nobuyasu Honda

发明人： Yoshinori Urata ,  Tatsuo Imafuku ,  Toshihisa Ishida ,  Takahiro Bito ,  Tadashi Nakamura ,  Yoshiaki Akazawa ,  Yasuharu Morinishi ,  Nobuyasu Honda

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

CPC分类号： G03G9/08704 ,  G03G9/0825 ,  G03G9/08782

摘要： A binder resin as the main component of the toner has a low molecular weight polypropylene as a separating agent, encapsulated therein. Using this binder a toner with the wax having a diameter of 0.3 .mu.m or less dispersed therein is produced. The wax is included 0.5 part to 5 parts by weight for 100 parts by weight of the binder resin. This limitation of the toner prevents the setoff phenomenon during the fixing process and at the same time prevents the filming phenomenon over the photoreceptor and achieves an improved fixing performance.

摘要翻译： 作为调色剂的主要成分的粘合剂树脂具有作为分离剂的低分子量聚丙烯，被封装在其中。 使用该粘合剂制造分散有直径为0.3μm以下的蜡的调色剂。 对于100重量份的粘合剂树脂，蜡包含0.5重量份至5重量份。 调色剂的这种限制防止了定影过程中的咬合现象，并且同时防止了感光体上的成膜现象并且实现了改进的定影性能。

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。

公开(公告)号：US6066423A

公开(公告)日：2000-05-23

申请号：US266025

申请日：1999-03-11

申请人： Tatsuo Imafuku ,  Toshihisa Ishida ,  Yoshinori Urata ,  Takahiro Bito ,  Nobuyasu Honda

发明人： Tatsuo Imafuku ,  Toshihisa Ishida ,  Yoshinori Urata ,  Takahiro Bito ,  Nobuyasu Honda

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/09

CPC分类号： G03G9/08795 ,  G03G9/08797 ,  G03G9/0906

摘要： A toner for electrophotography includes a binder resin as the main component and a coloring agent, wherein the binder resin contains a low molecular weight polypropylene as a separating agent, encapsulated therein; the acid value of the binder resin is adjusted equal to 1.0 (mgKOH/g) or below; and the coloring agent has a surface which is not oxidation treated and presents a pH of 7.0 or higher. Limiting the added amount and the diameter of encapsulated and dispersed polypropylene wax provides prevention against both the setoff and filming phenomena.

摘要翻译： 用于电子照相的调色剂包括粘合剂树脂作为主要成分和着色剂，其中粘合剂树脂含有作为分离剂的低分子量聚丙烯，被包封在其中; 将粘合剂树脂的酸值调节为1.0（mgKOH / g）以下; 并且着色剂具有未经氧化处理的表面，其pH为7.0以上。 限制包封和分散的聚丙烯蜡的添加量和直径提供了防止切割和成膜现象的预防。

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。

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。

公开(公告)号：US06864031B2

公开(公告)日：2005-03-08

申请号：US10752463

申请日：2004-01-05

申请人： Toshihisa Ishida ,  Tatsuo Imafuku ,  Junichi Saito ,  Takahiro Bito

发明人： Toshihisa Ishida ,  Tatsuo Imafuku ,  Junichi Saito ,  Takahiro Bito

IPC分类号： G03G9/08 ,  G03G9/107 ,  G03G9/113 ,  G03G13/09 ,  G03G15/14

CPC分类号： G03G9/0819 ,  G03G9/1075 ,  G03G9/1136 ,  G03G13/09

摘要： The present invention provides an electrophotographic developer which reduces toner contamination on the surface of a developer carrier even when a development effective range is narrowed and which is stabilized in an image quality in every environmental situation and has a long life and a low cost and an image-forming method using the same.In the present invention, used for the electrostatically charged-image holder described above having a radius of curvature of 18 mm or less in a development effective range is the electrophotographic developer which is a two-component developer comprising a toner comprising at least a binder and a colorant and a carrier which is coated with a resin and has a weight average particle diameter of 40 to 100 μm, wherein the above toner has a volume average particle diameter of 8 to 11.5 μm, and the toner particles having a diameter of 6.35 μm or less account for 20 number % or less.

摘要翻译： 本发明提供了一种电子照相显影剂，即使在显影有效范围变窄并且在每种环境情况下稳定在图像质量中并且具有长寿命和低成本以及图像的情况下，也可以减少显影剂载体表面上的调色剂污染 在本发明中，在显影有效范围内用于上述具有18mm或更小的曲率半径的静电带电图像保持器的本发明是作为双组分显​​影剂的电子照相显影剂，其包含 包含至少粘合剂和着色剂的调色剂和涂覆有树脂并具有40至100μm重量平均粒径的载体，其中上述调色剂的体积平均粒径为8至11.5μm，并且调色剂 直径6.35μm或更小的颗粒占20％或更少。

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。

公开(公告)号：US5565294A

公开(公告)日：1996-10-15

申请号：US561885

申请日：1995-11-22

申请人： Tadayuki Sawai ,  Tadashi Nakamura ,  Toshihiko Murakami ,  Yasuharu Morinishi ,  Katsuaki Sumida ,  Toshihisa Ishida

发明人： Tadayuki Sawai ,  Tadashi Nakamura ,  Toshihiko Murakami ,  Yasuharu Morinishi ,  Katsuaki Sumida ,  Toshihisa Ishida

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

CPC分类号： G03G9/08704

摘要： The electrostatic charge image-developing toner contains a colorant, a binder resin, and polyethylene having a melt viscosity of 22000 to 26800 mPa.multidot.s at 140.degree. C. This electrostatic charge image-developing toner prevents an offset phenomenon on the surface of a fixing roller, and does not adhere to and fuse on a photoreceptor drum to cause no stripy and dotwise stain on a reproduced image, that is, preventing a so-called filming phenomenon. The toner also prevents an offset phenomenon on the photoreceptor drum.

摘要翻译： 静电荷图像显影调色剂含有着色剂，粘合剂树脂和在140℃熔融粘度为22000至26800mPax的聚乙烯。该静电荷图像显影调色剂防止定影辊表面上的偏移现象， 并且不粘附并熔化在感光鼓上，在再现图像上不引起带状和点状污点，即防止所谓的成像现象。 调色剂还防止感光鼓上的偏移现象。

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。

公开(公告)号：US20070059629A1

公开(公告)日：2007-03-15

申请号：US11518902

申请日：2006-09-12

申请人： Takeshi Katoh ,  Toshihisa Ishida ,  Yoshinori Urata ,  Kazuya Korematu ,  Takeshi Takayama ,  Mitsuhiro Hasegawa

发明人： Takeshi Katoh ,  Toshihisa Ishida ,  Yoshinori Urata ,  Kazuya Korematu ,  Takeshi Takayama ,  Mitsuhiro Hasegawa

IPC分类号： G03G9/113

CPC分类号： G03G9/1131 ,  G03G9/1075 ,  G03G9/1133 ,  G03G9/1135 ,  G03G9/1136 ,  G03G9/1139

摘要： A two-component developing agent containing a carrier which can maintain a charge-imparting property to a toner at a high level for a long period of time, does not generate flying of the carrier and can correspond to an image forming apparatus of present day having a long operation life and can form a high-quality image having high image density and sharpness, is provided. In the two-component developing agent containing a carrier in which a resin coating layer is formed on a surface of a core material, and a toner, in which an X-ray intensity of an alumina particle by a fluorescent X-ray analysis, the amount of the alumina particle to be used to the resin coating layer is adjusted such that it comes to be smaller than the X-ray intensity by the fluorescent X-ray analysis of a metal contained in a largest amount in the core material.

摘要翻译： 含有能够长时间保持高调色剂的电荷赋予性的载体的双组分显影剂不会产生载体的飞散，并且可以对应于当前的图像形成装置，具有 提供长的使用寿命并且可以形成具有高图像密度和清晰度的高质量图像。 在含有在芯材表面上形成有树脂被覆层的载体的双组分显影剂和通过荧光X射线分析的氧化铝颗粒的X射线强度的调色剂中， 调整使用于树脂被覆层的氧化铝粒子的量，使其比通过核心材料中最大量含有的金属的荧光X射线分析的X射线强度小。