公开(公告)号：US5670288A

公开(公告)日：1997-09-23

申请号：US599845

申请日：1996-02-12

申请人： Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Makoto Kanbayashi ,  Tsuyoshi Takiguchi ,  Yasuhiro Ichikawa ,  Wakashi Iida

发明人： Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Makoto Kanbayashi ,  Tsuyoshi Takiguchi ,  Yasuhiro Ichikawa ,  Wakashi Iida

IPC分类号： G03G9/09 ,  G03G9/097 ,  G03G9/10 ,  G03G9/107 ,  G03G13/09

CPC分类号： G03G9/10 ,  G03G9/0918 ,  G03G9/09708 ,  G03G9/09716 ,  G03G9/107

摘要： A carrier for electrophotography has carrier particles. The carrier has a 50% average particle diameter (D.sub.50) of from 15 .mu.m to 45 .mu.m and contains from 1% to 20% of carrier particles with a size smaller than 22 .mu.m, not more than 3% of carrier particles with a size smaller than 16 .mu.m, from 2% to 15% of carrier particles with a size of 62 .mu.m or larger, and not more than 2% of carrier particles with a size of 88 .mu.m or larger. The carrier has a specific surface area S.sub.1 as measured by an air-permeability method and a specific surface area S.sub.2 as calculated by the following expression: S.sub.2 =(6/.rho..multidot.D.sub.50).times.10.sup.4 wherein .rho. is a specific gravity of carrier; satisfying the following condition: 1.2 .ltoreq.S.sub.1 /S.sub.2 .ltoreq.2.0.

摘要翻译： 电子照相用载体具有载体颗粒。 载体具有15μm至45μm的50％平均粒径（D50），并且含有1％至20％的尺寸小于22μm的载体颗粒，不超过载体颗粒的3％ 尺寸小于16μm，尺寸为62μm或更大的载体颗粒的2％至15％，以及不大于2％的尺寸为88μm或更大的载体颗粒。 载体具有通过透气度测定的比表面积S1和通过下式计算的比表面积S2：S2 =（6 / rho×D50）×104其中rho是载体的比重; 满足以下条件：1.2

公开(公告)号：US5512402A

公开(公告)日：1996-04-30

申请号：US246146

申请日：1994-05-19

申请人： Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Makoto Kanbayashi ,  Tsuyoshi Takiguchi ,  Yasuhiro Ichikawa ,  Wakashi Iida

发明人： Kenji Okado ,  Toshiyuki Ugai ,  Ryoichi Fujita ,  Makoto Kanbayashi ,  Tsuyoshi Takiguchi ,  Yasuhiro Ichikawa ,  Wakashi Iida

IPC分类号： G03G9/09 ,  G03G9/097 ,  G03G9/10 ,  G03G9/107 ,  G03G9/08

CPC分类号： G03G9/10 ,  G03G9/0918 ,  G03G9/09708 ,  G03G9/09716 ,  G03G9/107

摘要： A carrier for electrophotography has carrier particles. The carrier has a 50% average particle diameter (D.sub.50) of from 15 .mu.m to 45 .mu.m and contains from 1% to 20% of carrier particles with a size smaller than 22 .mu.m, not more than 3% of carrier particles with a size smaller than 16 .mu.m, from 2% to 15% of carrier particles with a size of 62 .mu.m or larger, and not more than 2% of carrier particles with a size of 88 .mu.m or larger. The carrier has a specific surface area S.sub.1 as measured by an air-permeability method and a specific surface area S.sub.2 as calculated by the following expression:S.sub.2 =(6/.rho..D.sub.50).times.10.sup.4wherein .rho. is a specific gravity of carrier; satisfying the following condition:1.2.ltoreq.S.sub.1 /S.sub.2 .ltoreq.2.0.

摘要翻译： 电子照相用载体具有载体颗粒。 载体具有15μm至45μm的50％平均粒径（D50），并且含有1％至20％的尺寸小于22μm的载体颗粒，不超过载体颗粒的3％ 尺寸小于16μm，尺寸为62μm或更大的载体颗粒的2％至15％，以及不大于2％的尺寸为88μm或更大的载体颗粒。 载体具有通过透气度法测定的比表面积S1和通过下式计算的比表面积S2：S2 =（6 / rho.D50）×104其中rho是载体的比重; 满足以下条件：1.2

公开(公告)号：US5437949A

公开(公告)日：1995-08-01

申请号：US264345

申请日：1994-06-23

申请人： Makoto Kanbayashi ,  Tsuyoshi Takiguchi ,  Wakashi Iida

发明人： Makoto Kanbayashi ,  Tsuyoshi Takiguchi ,  Wakashi Iida

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

CPC分类号： G03G9/0821 ,  G03G9/081 ,  G03G9/0819

摘要： A color toner for developing an electrostatic image contains a binder resin and a colorant. The color toner has a weight average particle diameter of from 3 .mu.m to 7 .mu.m. The color toner contains from 10% to 70% by number of color toner particles with a particle diameter of 4.00 .mu.m or smaller, not less than 40% by number of color toner particles with a particle diameter of 5.04 .mu.m or smaller, from 2% to 20% by volume of color toner particles with a particle diameter of 8.00 .mu.m or larger, and not more than 6% by volume of color toner particles with a particle diameter of 10.08 .mu.m or larger. The color toner has such a coloring power that an image having been fixed on a transfer medium has an image density (D.sub.0.5) of from 1.0 to 1.8 when an unfixed color toner on the transfer medium is in a quantity (M/S) of 0.50 mg/cm.sup.2.

摘要翻译： 用于显影静电图像的彩色调色剂含有粘合剂树脂和着色剂。 彩色调色剂具有3μm至7μm的重均粒径。 彩色调色剂含有10〜70个数量的粒径为4.00μm或更小的彩色调色剂颗粒，不少于40个数量的粒径为5.04μm或更小的彩色调色剂颗粒， 2体积％至20体积％的粒径为8.00微米或更大的彩色调色剂颗粒和不超过6体积％的具有10.08μm或更大粒径的彩色调色剂颗粒。 彩色调色剂具有这样的着色力，当转印介质上的未定影的彩色调色剂的量（M / S）为数量时，固定在转印介质上的图像具有1.0至1.8的图像浓度（D0.5） 为0.50mg / cm 2。