公开(公告)号：US5360690A

公开(公告)日：1994-11-01

申请号：US090628

申请日：1993-07-12

申请人： Tetsuya Nakano ,  Mikiko Tamori ,  Naruo Yabe ,  Masahide Inoue ,  Kouichi Tsuyama ,  Yoshitake Shimizu

发明人： Tetsuya Nakano ,  Mikiko Tamori ,  Naruo Yabe ,  Masahide Inoue ,  Kouichi Tsuyama ,  Yoshitake Shimizu

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/107 ,  G03G9/113

CPC分类号： G03G9/1075 ,  G03G9/0904

摘要： A two-component developer comprising a magnetic carrier having a carbon black-containing resin-coating layer and a toner composed of a carbon black-containing resin composition is disclosed. A styrene resin, an acrylic resin or a styrene-acrylic copolymer resin is selected as each of the carrier-coating resin and the toner-forming resin, and the carbon black content A in the carrier-coating layer and the carbon black content B in the toner-forming layer satisfy requirements represented by the following formulae: ##STR1## Namely, by adjusting the carbon black contents A and B within specific ranges relatively to each other, a two-component developer which is well-balanced between the frictional chargeability characteristic and the electric resistance is provided.

摘要翻译： 公开了一种包含含有炭黑的树脂涂层的磁性载体和由含炭黑的树脂组合物构成的调色剂的双组分显影剂。 选择苯乙烯树脂，丙烯酸树脂或苯乙烯 - 丙烯酸共聚物树脂作为载体涂布树脂和调色剂形成树脂，载体涂层中的炭黑含量A和炭黑含量B 调色剂形成层满足以下公式所示的要求：-0.1B + 1 0。即，通过调整碳黑含量A和B 提供了相对于彼此的特定范围，提供了摩擦带电特性和电阻之间良好平衡的双组分显影剂。

公开(公告)号：US5104766A

公开(公告)日：1992-04-14

申请号：US544637

申请日：1990-06-27

申请人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Mitsushi Kuroki

发明人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Mitsushi Kuroki

IPC分类号： G03G9/097 ,  G03G9/08

CPC分类号： G03G9/0819

摘要： Disclosed are a toner for developing a statically charged image and a process for the preparation thereof. If a toner for developing a statically charged image, comprising a binder resin and, dispersed therein, a colorant and a charge-controlling dye, is prepared so that it has a particle size distribution satisfying the requirement represented by the following formula:N

公开(公告)号：US5376489A

公开(公告)日：1994-12-27

申请号：US946154

申请日：1992-09-17

申请人： Naruo Yabe ,  Tetsuya Nakano ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijiro Ishimaru

发明人： Naruo Yabe ,  Tetsuya Nakano ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijiro Ishimaru

IPC分类号： G03G9/08 ,  G03G9/113 ,  G03G9/087

CPC分类号： G03G9/1132 ,  G03G9/0823

摘要： The developer in accordance with the present invention includes toner, and a carrier having a core material the surface of which is coated with a coating layer made of a polymer, the coating layer having a resistance value sufficient to minimize the counter electric charge remaining in the coating layer, and the toner having any of characteristic values required for preventing a counter electric charge remaining in the coating layer from being increased. The use of the developer of the present invention not only prevents the occurrence of so-called carrier scattering, to thereby prevent blanking, but also produces an image of high quality having a high initial image density.

摘要翻译： 根据本发明的显影剂包括调色剂和具有芯材料的载体，其表面涂覆有由聚合物制成的涂层，所述涂层具有足以使剩余的反电荷最小化的电阻值 涂层，并且具有防止在涂层中剩余的相对电荷所需的任何特征值的调色剂增加。 使用本发明的显影剂不仅防止所谓的载体散射的发生，从而防止消隐，而且还产生具有高初始图像浓度的高质量的图像。

公开(公告)号：US5223367A

公开(公告)日：1993-06-29

申请号：US735273

申请日：1991-07-24

申请人： Seijiro Ishimaru ,  Tetsuya Nakano ,  Masahide Inoue ,  Koichi Tsuyama ,  Teruaki Teratani ,  Naruo Yabe ,  Yoshitake Shimizu

发明人： Seijiro Ishimaru ,  Tetsuya Nakano ,  Masahide Inoue ,  Koichi Tsuyama ,  Teruaki Teratani ,  Naruo Yabe ,  Yoshitake Shimizu

IPC分类号： G03G9/08

CPC分类号： G03G9/08

摘要： A start developer is described which includes a toner and a carrier, present in a predetermined ratio. The carrier spent amount is adjusted so that it is not less than 0.010% in terms of the amount of carbon, as measured with a carbon analyzer. With this start developer, good quality images may be formed throughout the copying operation, from the initial image forming stage to the repeated image forming stage and through the stabilized image forming stage.

公开(公告)号：US5264311A

公开(公告)日：1993-11-23

申请号：US570304

申请日：1990-08-20

申请人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Mitsushi Kuroki

发明人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Mitsushi Kuroki

IPC分类号： G03G9/087 ,  G03G9/00

CPC分类号： G03G9/08711 ,  G03G9/08728 ,  Y10S430/105

摘要： In an electrophotographic toner, by using as the binder resin a styrene/acrylic resin in which in the gel permeation chromatogram, a high molecular weight peak value appears in a molecular weight region higher than 1.times.10.sup.5, a low molecular weight peak value appears in a molecular weight region of from 2.times.10.sup.4 to 500, a minimum value appears halfways between the two peaks and the ratio (V/P) of the area of the valley to the peak area is lower than 0.3, the internal cohesive force of the binder resin for the toner can be prominently improved while maintaining the low-temperature fixing property and offset resistance at high levels, and pulverization of the toner and formation of the spent toner can be prevented during the developing operation and the durability of the toner can be improved.

公开(公告)号：US5281505A

公开(公告)日：1994-01-25

申请号：US720419

申请日：1991-06-25

申请人： Masahide Inoue ,  Tetsuya Nakano ,  Naruo Yabe ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijirou Ishimaru

发明人： Masahide Inoue ,  Tetsuya Nakano ,  Naruo Yabe ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijirou Ishimaru

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

CPC分类号： G03G9/0821 ,  G03G9/0825 ,  G03G9/09

摘要： A toner composition comprising a binder resin having dispersed therein additives including a colorant and a charge control agent, wherein said additives are present as agglomerates having an average sectional area of from 1.4 to 1.7 .mu.m.sup.2 in a section of toner particles, the total sectional area of the agglomerates in the section of toner particles ranging from 1.5 to 1.8%, or wherein said colorant and charge control agent are present as agglomerates having an average sectional area of from 1.4 to 1.7 .mu.m.sup.2 in a section of toner particles, and said composition has such rheological characteristics that a dissipation factor (tan .delta.) is from 0.95 to 1.25 when a storage elastic modulus (G') is 10.sup.4 dyne/cm.sup.2.

摘要翻译： 一种调色剂组合物，其包含分散有添加剂的粘合剂树脂，所述添加剂包括着色剂和电荷控制剂，其中所述添加剂以调色剂颗粒的截面中平均截面积为1.4-1.7（my） 在调色剂颗粒部分中的附聚物的截面积为1.5至1.8％，或其中所述着色剂和电荷控制剂作为附聚物以在调色剂颗粒的一部分中的平均截面积为1.4至1.7（my） 并且所述组合物具有这样的流变特性，当储能弹性模量（G'）为104达因/ cm 2时，损耗因子（tan（delta））为0.95至1.25。

公开(公告)号：US5232807A

公开(公告)日：1993-08-03

申请号：US735270

申请日：1991-07-24

申请人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijiro Ishimaru

发明人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijiro Ishimaru

IPC分类号： G03G9/087 ,  G03G9/113

CPC分类号： G03G9/08711 ,  G03G9/1133 ,  Y10S430/105

摘要： The present invention provides an electrophotographic developer comprising (i) a toner containing, as a fixing resin, a styrene-acrylic copolymer presenting a gel permeation chromatogram showing a molecular-weight distribution in which the detection-starting molecular weight and the detection-ending molecular weight are respectively located in specific ranges, and (ii) a carrier coated with a coating resin which is a styrene-acrylic copolymer containing at least 2-hydroxyethyl acrylate.Even though repeatedly agitated in the developing device, the electrophotographic developer of the present invention is not deteriorated and assures good durability and long life-time.

公开(公告)号：US5240804A

公开(公告)日：1993-08-31

申请号：US736436

申请日：1991-07-26

申请人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Seijiro Ishimaru ,  Yoshitake Shimizu

发明人： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Seijiro Ishimaru ,  Yoshitake Shimizu

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/113

CPC分类号： G03G9/09 ,  G03G9/0819 ,  G03G9/08711 ,  G03G9/091 ,  G03G9/1133

摘要： The present invention provides an electrophotographic developer comprising (i) a toner containing a fixing resin in which the content of an acrylic component is limited to a predetermined range, or a toner of which surface dye density is limited to a predetermined range, and (ii) a carrier coated with a coating resin containing, as an acrylic component, dodecyl methacrylate or 2-hydroxyethyl acrylate.In the electrophotographic developer of the present invention, the electric charging characteristics are always stable.

公开(公告)号：US5110704A

公开(公告)日：1992-05-05

申请号：US544632

申请日：1990-06-27

申请人： Masahide Inoue ,  Tetsuya Nakano ,  Naruo Yabe ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Mitsushi Kuroki

发明人： Masahide Inoue ,  Tetsuya Nakano ,  Naruo Yabe ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Mitsushi Kuroki

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

CPC分类号： G03G9/0821 ,  G03G9/08711

摘要： Disclosed is a toner for developing a statically charged image, which comprises a fixing resin and, dispersed therein, a colorant and a charge-controlling dye. This toner is characterized in that the tangent (tan .delta.) of the loss angle is in the range of from 0.95 to 1.25 when the storage modulus of elasticity (G') is 10.sup.4 dyne/cm.sup.2. The toner having such rheological characteristics has an excellent fixing property, a high offset resistance, a capacity of forming an image having a high quality and a good durability.

公开(公告)号：US20070212629A1

公开(公告)日：2007-09-13

申请号：US11714121

申请日：2007-03-06

申请人： Naruo Yabe ,  Kousuke Satou

发明人： Naruo Yabe ,  Kousuke Satou

IPC分类号： G03G9/08

CPC分类号： G03G9/09708 ,  G03G5/08214 ,  G03G9/0819 ,  G03G9/09716

摘要： Disclosed is a toner for use in an image forming apparatus using an amorphous silicon photoconductor as a latent image carrier, and having a cleaning blade for removing the toner remaining on the photoconductor after a transfer step. The toner has a friction coefficient with the photoconductor in a range of 0.3 to 0.6. At least inorganic fine particles such as titanium oxide are externally added to the toner. The inorganic fine particles have a number-average primary particle size of 30 nm or more.

摘要翻译： 公开了一种用于使用非晶硅光电导体作为潜像载体的图像形成装置中的调色剂，并且具有用于在转印步骤之后除去残留在感光体上的调色剂的清洁刮板。 调色剂与光电导体的摩擦系数在0.3至0.6的范围内。 至少在调色剂中外加添加氧化钛等无机细颗粒。 无机微粒的数均一次粒径为30nm以上。