公开(公告)号：US6083655A

公开(公告)日：2000-07-04

申请号：US353840

申请日：1999-07-15

申请人： Hitoshi Itabashi ,  Yuko Sato ,  Yoshinobu Baba ,  Yuzo Tokunaga

发明人： Hitoshi Itabashi ,  Yuko Sato ,  Yoshinobu Baba ,  Yuzo Tokunaga

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

CPC分类号： G03G15/0928 ,  G03G9/107 ,  G03G2215/0609

摘要： A developing method including the steps of: stirring a two component-type developer which contains a toner and a carrier; conveying the developer to a developing section with a conveying screw and a developer carrying member; and developing an electrostatic latent image on an image holding member by forming a magnetic brush on a developing magnetic pole, wherein the carrier is a magnetic material dispersion-type resin carrier containing a binder resin and a metal oxide, has a low coercive force and has been previously exposed and magnetized in a specific magnetic field and has stable residual magnetization, thereby imparting a high durability to the developer and making it usable for a long time to reproduce a large number of images having stable qualities.

摘要翻译： 一种显影方法，包括以下步骤：搅拌含有调色剂和载体的双组分型显影剂; 使用输送螺杆和显影剂承载构件将显影剂输送到显影部分; 以及通过在显影磁极上形成磁刷而在图像保持部件上显影静电潜像，其中载体是含有粘合剂树脂和金属氧化物的磁性材料分散型树脂载体，具有低的矫顽力，并具有 先前在特定磁场中暴露并磁化，并且具有稳定的剩余磁化强度，从而赋予显影剂高的耐久性，并使得其可以长时间地再现大量具有稳定品质的图像。

公开(公告)号：US5573880A

公开(公告)日：1996-11-12

申请号：US363959

申请日：1994-12-27

申请人： Shinya Mayama ,  Takeshi Ikeda ,  Yuko Sato ,  Yoshinobu Baba ,  Hiroshi Aoto ,  Yasuko Hayashi ,  Hitoshi Itabashi ,  Yuzo Tokunaga

发明人： Shinya Mayama ,  Takeshi Ikeda ,  Yuko Sato ,  Yoshinobu Baba ,  Hiroshi Aoto ,  Yasuko Hayashi ,  Hitoshi Itabashi ,  Yuzo Tokunaga

IPC分类号： G03G9/08 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113 ,  G03G15/08 ,  G03G15/09

CPC分类号： G03G9/1075 ,  G03G9/10 ,  G03G9/1132

摘要： A carrier for use in electrophotography has carrier particles. The carrier particles each comprise a carrier core particle and a resin for coating the carrier core particle and having a resistivity of 10.sup.10 .OMEGA..multidot.cm or above under conditions of a temperature of 23.degree. C. and a humidity of 50% RH. The carrier particles have an average particle diameter of not larger than 100 .mu.m and a resistivity of 10.sup.10 .OMEGA..multidot.cm or above. The carrier particles comprise not less than 80% by number of resin-coated carrier particles whose carrier core particles are each coated with a resin in a coverage of not less than 90%.

摘要翻译： 用于电子照相术的载体具有载体颗粒。 载体颗粒各自包含载体芯颗粒和用于涂覆载体芯颗粒的树脂，并且在23℃和50％RH的湿度的条件下具有1010ΩEGAxcm或更高的电阻率。 载体颗粒的平均粒径不大于100μm，电阻率为1010欧米伽×厘米或以上。 载体颗粒包含不少于80个数量的树脂涂覆的载体颗粒，其载体芯颗粒各自以不低于90％的覆盖率覆盖树脂。

公开(公告)号：US6165663A

公开(公告)日：2000-12-26

申请号：US422105

申请日：1999-10-20

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

IPC分类号： G03G9/08 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113 ,  G03G13/09

CPC分类号： G03G9/0827 ,  G03G9/0821 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1132 ,  G03G9/1136

摘要： A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic coated carrier particles comprising magnetic carrier core particles each comprising a binder resin and metal oxide particles, and a coating layer surface-coating each carrier core particle. The metal oxide particles have been subjected to a surface lipophilicity-imparting treatment. The magnetic carrier core particles have a resistivity of at least 1.times.10.sup.10 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1.times.10.sup.12 ohm.cm. The magnetic coated carrier has a particle size distribution such that (i) it has a number-average particle size Dn of 5-100 .mu.m, (ii) it satisfies a relationship of Dn/.sigma..gtoreq.3.5, wherein .sigma. denotes a standard deviation of number-basis particle size distribution of the carrier, and (iii) it contains at most 25% by number of particles having particle sizes of at most Dn.times.2/3.

摘要翻译： 适用于构成用于电子照相术的双组分型显影剂的磁性涂层载体由包括磁性涂覆载体颗粒的磁性涂覆载体颗粒组成，所述磁性涂覆载体颗粒包括各自包含粘合剂树脂和金属氧化物颗粒的磁性载体芯颗粒，以及涂层表面 - 涂覆每个载体芯颗粒。 金属氧化物颗粒已进行表面亲油性赋予处理。 磁性载体芯颗粒具有至少1×10 10欧姆·厘米的电阻率，并且磁性涂覆载体的电阻率至少为1×10 12欧姆·厘米。 磁性涂层载体具有如下的粒度分布：（i）其数均粒径Dn为5-100μm，（ii）满足Dn / sigma = 3.5的关系，其中σ表示 载体的基于数量的粒度分布的标准偏差，和（iii）其含有至多25％数量的粒径至多Dnx + E，fra 2/3 + EE的颗粒。

公开(公告)号：US5766814A

公开(公告)日：1998-06-16

申请号：US826678

申请日：1997-04-07

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yuko Sato ,  Hitoshi Itabashi ,  Yuzo Tokunaga

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

CPC分类号： G03G9/1136 ,  G03G9/10 ,  G03G9/107

摘要： A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic carrier core particles and a resinous surface coated layer coating the magnetic carrier core particles. The carrier is suitably constituted so as to satisfy the condition of: (a) the magnetic carrier core particles has a resistivity of at least 1.times.10.sup.10 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1.times.10.sup.12 ohm.cm, (b) the magnetic coated carrier has a number-average particle size of 1-100 .mu.m and has such a particle size distribution that particles having particle sizes of at most a half of the number-average particle size occupy an accumulative percentage of at most 20% by number, (c) the magnetic coated carrier has a shape factor SF-1 of 100-130, (d) the magnetic coated carrier has a magnetization at 1 kilo-oersted of 40-250 emu/cm.sup.3, and (e) the resinous surface coating layer comprises a coating resin composition which in turn comprises a straight silicone resin and a coupling agent. The straight silicone resin includes trifunctional silicon and difunctional silicon in an atomic ratio of 100:0-40:60.

摘要翻译： 适用于构成用于电子照相术的双组分型显影剂的磁性涂层载体由包括磁性载体芯颗粒的磁性涂覆载体颗粒和涂覆磁性载体芯颗粒的树脂表面涂层组成。 载体适当地构成为满足以下条件：（a）磁性载体芯颗粒具有至少1×10 10欧姆·厘米的电阻率，并且磁性涂覆载体的电阻率至少为1×10 12欧姆·厘米，（b ）磁性涂布载体的数均粒径为1-100μm，并且具有这样的粒度分布，使得粒径至多为数均粒径的一半的颗粒占累积百分比至多为20 （c）磁性涂层载体的形状因子SF-1为100-130，（d）磁性涂层载体的磁化强度为1千奥斯特值为40-250emu / cm3，（e） 树脂表面涂层包括涂层树脂组合物，其又包含直的有机硅树脂和偶联剂。 直的有机硅树脂包括原子比为100:0-40:60的三官能硅和二官能硅。

公开(公告)号：US06358658B1

公开(公告)日：2002-03-19

申请号：US09443133

申请日：1999-11-18

申请人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

发明人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

IPC分类号： G03G900

CPC分类号： G03G9/0825 ,  G03G9/08773 ,  G03G9/097 ,  G03G9/09775

摘要： A toner is comprised of toner particles composed of at least a binder resin and a clorant, wherein the toner particles each have a coating layer formed on their surfaces in a state of particulate matters being stuck to one another. The particulate matters contains at least a silicon compound.

公开(公告)号：US06566028B2

公开(公告)日：2003-05-20

申请号：US09819067

申请日：2001-07-16

申请人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

发明人： Yayoi Tazawa ,  Takeshi Ikeda ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

IPC分类号： G03G500

CPC分类号： G03G9/0825 ,  G03G9/08773 ,  G03G9/097 ,  G03G9/09775

摘要： A toner is comprised of toner particles composed of at least a binder resin and a clorant, wherein the toner particles each have a coating layer formed on their surfaces in a state of particulate matters being stuck to one another. The particulate matters contains at least a silicon compound.

公开(公告)号：US6106990A

公开(公告)日：2000-08-22

申请号：US362885

申请日：1999-07-29

申请人： Yayoi Tazawa ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

发明人： Yayoi Tazawa ,  Yoshinobu Baba ,  Hitoshi Itabashi ,  Yuzo Tokunaga ,  Yasukazu Ayaki

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/0804

摘要： A process for producing toner particles is conducted by:preparing toner precursor particles containing at least binder resin and coloring agent; andspherizing the toner precursor particles to obtain toner particles;wherein spherizing steps include;(1) dispersing the toner precursor particles in an aqueous medium containing a dispersant, thereby preparing a disperse system (a);(2) dispersing oil droplet particles containing a softening agent into an aqueous medium, thereby preparing a disperse system (b);(3) preparing a mixed disperse system (c) by adding the disperse system (a) to the disperse system (b), and causing the softening agent to be absorbed by the toner precursor particles in the mixed disperse system (c); and(4) removing the softening agent from the toner precursor particles.

摘要翻译： 制造调色剂颗粒的方法是：制备至少含有粘合剂树脂和着色剂的调色剂前体颗粒; 并调色调色剂前体颗粒以获得调色剂颗粒; 其中包括步骤包括： （1）将调色剂前体颗粒分散在含有分散剂的水性介质中，从而制备分散体系（a）; （2）将含有软化剂的油滴颗粒分散在水性介质中，从而制备分散体系（b）; （3）通过向分散系统（b）中加入分散体系（a）制备混合分散系统（c），并使软化剂被混合分散系统（c）中的调色剂前体颗粒吸收; 和（4）从调色剂前体颗粒中除去软化剂。

公开(公告)号：US5576133A

公开(公告)日：1996-11-19

申请号：US502182

申请日：1995-07-13

申请人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yasuko Amano ,  Hitoshi Itabashi

发明人： Yoshinobu Baba ,  Takeshi Ikeda ,  Yasuko Amano ,  Hitoshi Itabashi

IPC分类号： G03G9/107

CPC分类号： G03G9/1075

摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 30 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, a magnetization (residual magnetization .sigma..sub.r) of at least 25 emu/cm.sup.3 under a magnetic field strength of zero oersted, a coercive force of less than 300 oersted, and a relationship of:.vertline..sigma..sub.1000 -.sigma..sub.300 .vertline./.sigma..sub.1000 .ltoreq.0.40wherein .sigma..sub.1000 and .sigma..sub.300 denote magnetizations under magnetic field strength of 1000 oersted and 300 oersted, respectively.

摘要翻译： 通过使用粒径为5-100μm的磁性载体，构成了电子照相显示改善的电子照相性能并且不含载体粘附性（不希望的载体转移到感光构件和记录材料）的双组分型显影剂。 载体的体积密度至多为30g / cm 3，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm 3，磁化强度（剩余磁化σr）至少为25emu / cm3，磁场强度为零奥斯特，矫顽力小于300奥斯特，关系为：| 西格玛1000西格玛300 | /西格玛1000

公开(公告)号：US5985502A

公开(公告)日：1999-11-16

申请号：US994030

申请日：1997-12-18

申请人： Yasukazu Ayaki ,  Takeshi Ikeda ,  Tetsuro Fukui ,  Yoshinobu Baba ,  Hitoshi Itabashi

发明人： Yasukazu Ayaki ,  Takeshi Ikeda ,  Tetsuro Fukui ,  Yoshinobu Baba ,  Hitoshi Itabashi

IPC分类号： G03G9/08 ,  G03G9/087

CPC分类号： G03G9/0806 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08795

摘要： A toner has at least 100 parts by weight of binder resin and 0.1 to 15 parts by weight of colorant. The toner has a number average particle size (Dn) of 0.5 to 6.0 .mu.m, a particle size distribution coefficient (volume average particle size (Dv) / number average particle size (Dn)) of 1.0 to 1.3 and a variation coefficient of particle number distribution of 20% or less.The toner contains 0.1 to 5.0% by weight of methanol-soluble resin component extracted by the first Soxhlet extraction with methanol and 50 to 99% by weight of THF-soluble resin component extracted by a second Soxhlet extraction with tetrahydrofuran (THF) after the Soxhlet extraction with methanol, wherein the maximum glass transition point (Tg.sub.2) of the methanol-soluble resin component and the glass transition point (Tg.sub.1) of the THF-soluble resin component satisfies the following relation;0 (.degree. C.)

摘要翻译： 调色剂具有至少100重量份的粘合剂树脂和0.1至15重量份的着色剂。 调色剂的数均粒径（Dn）为0.5〜6.0μm，粒径分布系数（体积平均粒径（Dv）/数均粒径（Dn））为1.0〜1.3，粒子的变异系数 数量分布在20％以下。 调色剂含有0.1至5.0重量％的甲醇可溶性树脂组分，通过第一次索格利特甲醇萃取提取甲醇溶解树脂组分，以及50至99重量％的THF可溶性树脂组分，经索氏提取后通过第四次索格利特萃取 用甲醇萃取，其中甲醇可溶性树脂组分的最大玻璃化转变温度（Tg2）和THF可溶性树脂组分的玻璃化转变温度（Tg1）满足以下关系： 0（℃）

公开(公告)号：US5439771A

公开(公告)日：1995-08-08

申请号：US103034

申请日：1993-07-28

申请人： Yoshinobu Baba ,  Yasuko Amano ,  Hitoshi Itabashi

发明人： Yoshinobu Baba ,  Yasuko Amano ,  Hitoshi Itabashi

IPC分类号： G03G9/10 ,  G03G9/107

CPC分类号： G03G9/10 ,  G03G9/1075

摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier comprising a soft magnetic material of 5-100 .mu.m in particle size. The carrier has a bulk density of at most 3.0 g/cm.sup.3, and magnetic properties including: a magnetization of 30-150 emu/cm.sup.3 under a magnetic field strength of 1000 oersted, and relationships (1) and (2):.vertline..sigma..sub.1000 -.sigma..sub.300 .vertline./.sigma..sub.1000 .ltoreq.0.40 (1)wherein .sigma..sub.1000 and .sigma..sub.300 denote magnetizations (emu/cm.sup.3) under magnetic field strengths of 1000 oersted (Oe) and 300 oersted (Oe), respectively, and0.15 (emu/cm.sup.3.Oe).ltoreq..vertline..sigma..sub.100 -.sigma..sub.r .vertline./100 (Oe) (2)wherein .sigma..sub.100 and .sigma..sub.r denote magnetizations (emu/cm.sup.3) under magnetic field strengths of 100 (Oe) and zero (Oe), respectively.

摘要翻译： 用于电子照相的双组分型显影剂通过使用包含5-100μm的软磁性材料的磁性载体构成，其显示改进的电子照相性能并且不含载体粘附（对感光构件和记录材料的不良载体转移） 尺寸。 载体的体积密度为3.0g / cm 3以下，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm3，以及（1）和（2）： sigma 1000-sigma 300 | / sigma 1000