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：US6159648A

公开(公告)日：2000-12-12

申请号：US373751

申请日：1999-08-13

申请人： Yoshinobu Baba ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Yuzo Tokunaga

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

CPC分类号： G03G9/0819 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G13/09

摘要： A two-component type developer for developing an electrostatic image is constituted by at least a toner and a magnetic carrier. The toner has a weight-average particle size D4 of at most 10 .mu.m and a number-average particle size D1 satisfying D4/D1.ltoreq.1.5. The magnetic carrier comprises composite particles comprising magnetic iron compound particles, non-magnetic metal oxide particles, and a binder comprising a phenolic resin. The composite particles contain the magnetic iron compound and the non-magnetic metal oxide in a total proportion of 80-99 wt. %. The magnetic iron compound particles have a number-average particle size ra, and the non-magnetic metal oxide particles have a number-average particle size r.sub.b satisfying r.sub.b /r.sub.a >1.0.

公开(公告)号：US5712069A

公开(公告)日：1998-01-27

申请号：US536782

申请日：1995-09-29

申请人： Yoshinobu Baba ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Yuzo Tokunaga

IPC分类号： G03G9/08 ,  G03G9/10 ,  G03G9/107 ,  G03G13/01 ,  G03G13/09 ,  G03G9/083

CPC分类号： G03G13/013 ,  G03G13/09 ,  G03G9/0819 ,  G03G9/10 ,  G03G9/107

摘要： A two-component type developer for developing an electrostatic image is constituted by at least a toner and a magnetic carrier. The toner has a weight-average particle size D4 of 1-10 .mu.m, a number-average particle size D1 and such a particle size distribution that particles having size of at most D1/2 occupy at most 20% by number and particles having sizes of at least D4.times.2 occupy at most 10% by volume. The magnetic carrier has a number-average particle size of 1-100 .mu.m and contains at most 20% by number of particles having sizes in the range of at most a half of the number-average particle size, the magnetic carrier has a resistivity of at least 1.times.10.sup.12 ohm.cm and has a core having a resistivity of at least 1.times.10.sup.10 ohm.cm, and the magnetic carrier has a magnetization at 1 kilo-oersted of 30-150 emu/g.

摘要翻译： 用于显影静电图像的双组分型显影剂由至少调色剂和磁性载体构成。 调色剂的重均粒径D4为1-10μm，数均粒径D1，粒径至多为D + E，最大为1/2 + EE的粒子的粒径分布最多占用 20数量％，尺寸至少为D4x2的颗粒占体积的至多10体积％。 磁性载体的数均粒径为1-100μm，并且含有至多20个数量的粒径在数均粒径的至多一半范围内的粒子，磁性载体具有电阻率 至少为1×10 12欧姆·厘米，并且具有至少1×10 10欧姆·厘米的电阻率的芯，并且磁性载体的磁化强度为1千奥斯特，为30-150埃姆/克。

公开(公告)号：US6010811A

公开(公告)日：2000-01-04

申请号：US910211

申请日：1997-08-13

申请人： Yoshinobu Baba ,  Yuzo Tokunaga

发明人： Yoshinobu Baba ,  Yuzo Tokunaga

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

CPC分类号： G03G9/0819 ,  G03G13/09 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1075

摘要： A two-component type developer for developing an electrostatic image is constituted by at least a toner and a magnetic carrier. The toner has a weight-average particle size D4 of at most 10 .mu.m and a number-average particle size D1 satisfying D4/D1.ltoreq.1.5. The magnetic carrier comprises composite particles comprising magnetic iron compound particles, non-magnetic metal oxide particles, and a binder comprising a phenolic resin. The composite particles contain the magnetic iron compound and the non-magnetic metal oxide in a total proportion of 80-99 wt. %. The magnetic iron compound particles have a number-average particle size ra, and the non-magnetic metal oxide particles have a number-average particle size r.sub.b satisfying r.sub.b /r.sub.a >1.0.

摘要翻译： 用于显影静电图像的双组分型显影剂由至少调色剂和磁性载体构成。 调色剂的重均粒径D4至多为10μm，数均粒径D1满足D4 / D1 <1.5。 磁性载体包括包含磁性铁化合物颗粒，非磁性金属氧化物颗粒和包含酚醛树脂的粘合剂的复合颗粒。 复合颗粒含有总重量为80-99重量％的磁性铁化合物和非磁性金属氧化物。 ％。 磁性铁化合物颗粒具有数均粒径ra，非磁性金属氧化物颗粒的数均粒径rb满足rb / ra> 1.0。