公开(公告)号：US6130018A

公开(公告)日：2000-10-10

申请号：US361412

申请日：1999-07-27

申请人： Hideaki Kawata ,  Akinori Koyama ,  Nobuaki Kawano

发明人： Hideaki Kawata ,  Akinori Koyama ,  Nobuaki Kawano

IPC分类号： G03G9/10 ,  G03G9/113 ,  G03G9/107 ,  G03G21/00

CPC分类号： G03G9/113 ,  G03G9/10 ,  G03G21/0076 ,  G03G2221/001

摘要： A carrier for use in development of an electrostatic latent image and an image forming apparatus using the carrier, with which a stable charging ability is maintained for a long period of time, and a high density image free from fog can be formed. The carrier has magnetic material particles coated with a coating resin. The coating resin is a thermoplastic resin, with a hardness of rank F to B in the terms of the pencil scratch test, and is present in an amount of 0.5 to 5 parts by weight to 100 parts by weight of the magnetic material particles.

摘要翻译： 可以形成用于显影静电潜像的载体和使用该载体的图像形成装置，其长时间保持稳定的充电能力，并且可以形成没有雾的高密度图像。 载体具有被涂覆树脂涂覆的磁性材料颗粒。 涂布树脂是热塑性树脂，其铅笔划痕试验的硬度为F〜B，相对于100重量份的磁性体颗粒，其含量为0.5〜5重量份。

公开(公告)号：US5272034A

公开(公告)日：1993-12-21

申请号：US913051

申请日：1992-07-14

申请人： Nobuaki Kawano ,  Nobuyuki Tsuji ,  Takatomo Fukumoto ,  Kaoru Tanaka ,  Masanori Fujii ,  Atsushi Yamaguchi ,  Kazuhiko Fujii ,  Koji Okuda

发明人： Nobuaki Kawano ,  Nobuyuki Tsuji ,  Takatomo Fukumoto ,  Kaoru Tanaka ,  Masanori Fujii ,  Atsushi Yamaguchi ,  Kazuhiko Fujii ,  Koji Okuda

IPC分类号： G03G9/08 ,  G03G9/00 ,  G03G9/09 ,  G03G9/097

CPC分类号： G03G9/0817 ,  G03G9/081

摘要： In accordance with the present invention, the electrophotographic toner is produced by dispersing and mixing toner components containing a fixing resin, a coloring agent and an electric charge controlling dye, and by melting and kneading the resulting mixture, which is then subjected to pulverizing and classifying. According to the present invention, fine powder generated at the pulverizing and classifying steps is reused as added to a mixture of toner components as already dispersed and mixed at the dispersing and mixing step, and the surface dye density of the electric charge controlling dye is in the range from 1.0.times.10.sup.-3 to 1.7.times.10.sup.-3 g/g, or the rate of the amount of an electric charge controlling dye present on the surfaces of toner particles to the total amount of the electric charge controlling dye, is in the range from 10 to 27% by weight. Even though repeatedly used for a long period of time, the electrophotographic toner does not lower the developer in electric charging characteristics. Further, by adding the fine powder to the mixture as already dispersed and mixed at the dispersing and mixing step, there can be efficiently produced a fine-powder regenerated toner excellent in transfer efficiency, resolution and gradation.

公开(公告)号：US5246809A

公开(公告)日：1993-09-21

申请号：US812996

申请日：1991-12-24

申请人： Masatomi Funato ,  Hideaki Kawata ,  Nobuaki Kawano ,  Koji Honda

发明人： Masatomi Funato ,  Hideaki Kawata ,  Nobuaki Kawano ,  Koji Honda

IPC分类号： G03G9/107 ,  G03G9/113

CPC分类号： G03G9/1075 ,  G03G9/1131

摘要： A magnetic carrier for a two-component type developing agent used for the electrophotography, comprising resin-magnetic spherical particles which are formed by the polymerization of a monomer in which a magnetic powder is dispersed and which have a glass transition temperature of higher than 100.degree. C., the surfaces of said resin-magnetic spherical particles being coated with a surface-treated coating layer. Therefore, the surface-treated coating layer on the surfaces of the carriers can be heat-treated at 100.degree. C. or higher. The carrier therefore is light in weight, flowable, and exhibits excellent durability, resistance against the heat and stable electric characteristics irrespective of the passage of time.

摘要翻译： 一种用于电子照相术的双组分型显影剂的磁性载体，包括通过其中分散有磁性粉末并且玻璃化转变温度高于100℃的单体的聚合形成的树脂 - 磁性球形颗粒 所述树脂 - 磁性球形颗粒的表面涂覆有表面处理的涂层。 因此，载体表面上的表面处理涂层可以在100℃以上进行热处理。 因此，载体重量轻，流动性好，耐久性好，耐热性和电气性能稳定，不管时间如何。

公开(公告)号：US5085964A

公开(公告)日：1992-02-04

申请号：US550990

申请日：1990-07-11

申请人： Hideaki Kawata ,  Masatomi Funato ,  Kiminori Umeda ,  Nobuaki Kawano ,  Koji Honda

发明人： Hideaki Kawata ,  Masatomi Funato ,  Kiminori Umeda ,  Nobuaki Kawano ,  Koji Honda

IPC分类号： G03G9/113

CPC分类号： G03G9/1136 ,  Y10S430/105

摘要： A specific silicone oil having a vicinal epoxy group is coated on a carrier for a developing or incorporated in a coating resin layer of a carrier for a developer. In this carrier, the spending phenomenon is prevented, the moisture resistance and flowability are improved, and a stable friction chargeability can be maintained for a long time and the durability is highly improved.

公开(公告)号：US5079124A

公开(公告)日：1992-01-07

申请号：US544672

申请日：1990-06-27

申请人： Hideaki Kawata ,  Masatomi Funato ,  Nobuaki Kawano ,  Koji Honda

发明人： Hideaki Kawata ,  Masatomi Funato ,  Nobuaki Kawano ,  Koji Honda

IPC分类号： G03G9/113

CPC分类号： G03G9/1137 ,  Y10S430/105 ,  Y10T428/2995

摘要： A resin-coated magnetic carrier for two-component developers which comprises magnetic particles and a resin coating formed on the individual magentic particles is described. The resin coating is made of a cured resin composition comprised of an alkylated melamine resin whose moelcular weight satisfies the followin inequalityM.gtoreq.1100C-400wherein M represents a weight average molecular weight of the resin and C represents the number of carbon atoms in the alkyl moiety, and an acryl-modified silicone resin. The use of the composition is effective in preventing the coated particles from melt adhesion and in forming a smooth and uniform coating layer on individual particles. The resin-coated carrier is significantly reduced in amount of spend carrier and has good durability, moisture resistance, chargeability.

公开(公告)号：US5670287A

公开(公告)日：1997-09-23

申请号：US505852

申请日：1995-07-24

申请人： Hideaki Kawata ,  Tomohide Iida ,  Yoshiteru Hatase ,  Hidekazu Tamura ,  Nobuaki Kawano

发明人： Hideaki Kawata ,  Tomohide Iida ,  Yoshiteru Hatase ,  Hidekazu Tamura ,  Nobuaki Kawano

IPC分类号： G03G9/113 ,  G03G9/107

CPC分类号： G03G9/1135 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1137 ,  Y10T428/2998

摘要： A magnetic carrier for electrophotographic developing agent wherein the surfaces of the magnetic core particles are partly coated with a thermosetting resin and a small amount of a low-melting or low-softening thermoplastic resin or wax, and at least recessed portions of the core particles are filled with these coating materials. The magnetic carrier has an electric resistance that is maintained within a range that is suited for forming the image, and suppresses the occurrence of spent toner.

摘要翻译： 一种用于电子照相显影剂的磁性载体，其中磁芯颗粒的表面部分地涂覆有热固性树脂和少量的低熔点或低软化的热塑性树脂或蜡，并且至少凹陷部分的芯颗粒是 填充这些涂料。 磁性载体具有保持在适于形成图像的范围内的电阻，并且抑制废色剂的发生。

公开(公告)号：US5834634A

公开(公告)日：1998-11-10

申请号：US726326

申请日：1996-10-03

申请人： Koji Honda ,  Haruo Koyama ,  Yusuke Ishitani ,  Nobuaki Kawano

发明人： Koji Honda ,  Haruo Koyama ,  Yusuke Ishitani ,  Nobuaki Kawano

IPC分类号： G01R29/24 ,  G01N5/00 ,  G01N27/60 ,  G03G15/08 ,  G03G15/09 ,  G01N15/06 ,  G01N27/00 ,  G01N27/74

CPC分类号： G03G15/0848 ,  G01N27/60 ,  G03G15/0849 ,  G01N5/00

摘要： A method and an apparatus for measuring the toner concentration and the amount of electric charge, capable of simultaneously measuring the toner concentration and the amount of electric charge easily and maintaining high precision using a simple device. A method of measuring the toner concentration and the amount of electric charge of a two-component developing agent, by filling a unit cell having a mesh in the lower portion thereof and a small ventilation port at the upper central portion thereof with a two-component developing agent consisting of a toner and a magnetic carrier, creating a downward stream of the developing agent at the central portion of the unit cell and an upward stream of the developing agent along the walls of the unit cell relying upon the suction through said mesh, discharging the separated toner out of the unit cell through the mesh, calculating the toner concentration from the reduction in the weight of the developing agent in the unit cell or from the amount of the discharged toner and calculating the amount of electric charge from the amount of electric charge of the unit cell.

摘要翻译： 一种用于测量调色剂浓度和电荷量的方法和装置，其能够容易地同时测量调色剂浓度和电荷量并且使用简单的装置保持高精度。 一种通过在其上部填充具有网状物的单电池和在其中央部分的小通风口来测量双组分显影剂的调色剂浓度和电荷量的方法， 由调色剂和磁性载体组成的显影剂，在单元电池的中心部分产生显影剂的向下流，并且依靠通过所述网的抽吸沿着单元电池的壁向上流动显影剂， 将分离出的调色剂通过网格排出单元电池，从单元电池中显影剂重量的减少或排出的调色剂的量计算调色剂浓度，并从电量计算电荷量 单位电池的电荷。

公开(公告)号：US5514509A

公开(公告)日：1996-05-07

申请号：US957680

申请日：1992-10-07

申请人： Hideaki Kawata ,  Nobuaki Kawano ,  Fumie Kimura ,  Seijiro Ishimaru

发明人： Hideaki Kawata ,  Nobuaki Kawano ,  Fumie Kimura ,  Seijiro Ishimaru

IPC分类号： G03G9/113 ,  G03G9/10

CPC分类号： G03G9/1136 ,  G03G9/1137

摘要： An electrophotographic developer includes a toner and a carrier, in which the carrier is provided on the surface of a core material thereof with a resin coating layer. The coating layer is made of cured body of a methyl silicone resin containing not less than 70% by weight of T-units and a methylated melamine resin having a molecular weight of not less than 700. This developer is not lowered in flowability, generates no spent particles and presents stable electric charging characteristics. Accordingly, the developer of the present invention is suitably used where a toner is used containing no electric charge controlling agent.

摘要翻译： 电子照相显影剂包括调色剂和载体，其中载体在其芯材的表面上设置有树脂涂层。 涂层由甲基硅氧烷树脂的固化体制成，含有不少于70重量％的T-单元和分子量不小于700的甲基化三聚氰胺树脂。该显影剂的流动性不降低，不产生 废弃的颗粒并呈现出稳定的充电特性。 因此，本发明的显影剂适用于不含电荷控制剂的调色剂的情况。