公开(公告)号：US5702857A

公开(公告)日：1997-12-30

申请号：US808640

申请日：1997-02-28

申请人： Takashi Nagai ,  Nobuyasu Honda ,  Tomohide Iida ,  Toshiaki Akiyama ,  Koji Kuramashi ,  Asao Toda

发明人： Takashi Nagai ,  Nobuyasu Honda ,  Tomohide Iida ,  Toshiaki Akiyama ,  Koji Kuramashi ,  Asao Toda

IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G13/08

CPC分类号： G03G13/08 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/097 ,  G03G9/09708

摘要： The present invention provides a method for impression development which comprises forming a thin layer of a toner on a surface of a developing roller with a plate-like rigid member, and developing an electrostatic latent image formed on a photoconductor by contacting the thin layer with the electrostatic latent image. The toner comprises toner particles, and prescribed amount of inorganic fine particles (mean particle diameter of 0.1 to 1.0 .mu.m on the volume basis), and/or comprises toner particles which have prescribed distribution of the odd-shape degree of the toner particle (mean value of the odd-shape degree and the proportion of the number of toner particles having the odd-shape degree of not more than 0.2). According to the method for impression development, it becomes possible to form an image having no failures and good image quality.

摘要翻译： 本发明提供一种印模发展方法，其包括在具有板状刚性构件的显影辊的表面上形成调色剂薄层，并且通过使薄层与所述薄层接触来显影形成在感光体上的静电潜像 静电潜像。 调色剂包括调色剂颗粒和规定量的无机细颗粒（基于体积的平均粒径为0.1至1.0μm），和/或包括具有规定分布的调色剂颗粒的奇数度的调色剂颗粒（ 异形度的平均值和奇数形状度的调色剂颗粒数的比例不大于0.2）。 根据印象发展的方法，可以形成没有故障和良好图像质量的图像。

公开(公告)号：US6127079A

公开(公告)日：2000-10-03

申请号：US461426

申请日：1999-12-16

申请人： Tadao Sumiyoshi ,  Tomohide Iida

发明人： Tadao Sumiyoshi ,  Tomohide Iida

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

CPC分类号： G03G9/1136 ,  G03G9/10 ,  G03G9/1075

摘要： A two-component-type developing agent comprising a silicone resin-coated carrier and a positively charging toner, the silicone coated carrier having an average particle diameter of from 60 to 110 .mu.m, the silicone resin coating having an average thickness of from 0.1 to 0.3 .mu.m, the carrier having a resistivity of from 1.5.times.10.sup.8 to 1.5.times.10.sup.11 .OMEGA..multidot.cm, the toner concentration being from 3.0 to 5.0 % by weight and the amount of electric charge by friction of the toner based on the suction method being from +10 to +20 .mu.c/g. The silicone resin-coated carrier and the developing agent feature long life without permitting the spent toner to adhere on the carrier surfaces, without permitting the carrier coating to peel off even after repetitively used for extended periods of time, featuring stable amount of electric charge by friction, stable developing properties, and maintaining favorable image quality for extended periods of time developing none of carrier dragging, toner scattering in the machine, background fogging or defective image density.

摘要翻译： 一种双组分型显影剂，其包含有机硅树脂涂覆的载体和带正电的调色剂，所述有机硅涂布载体的平均粒径为60-110μm，有机硅树脂涂层的平均厚度为0.1至 0.3μm，载体的电阻率为1.5×10 8至1.5×10 11欧姆×xcm，调色剂浓度为3.0-5.0％（重量），并且基于抽吸方法调色剂摩擦的电荷量为+10 至+20亩/克。 有机硅树脂涂布的载体和显影剂具有长寿命，而不会使用过的调色剂粘附在载体表面上，而不允许载体涂层即使在重复使用较长时间后也剥离，具有稳定的电荷量， 摩擦，稳定的显影性能，并且延长的时间段保持良好的图像质量，不会发生载体拖曳，机器中的调色剂飞散，背景雾化或图像密度不良。

公开(公告)号：US20150220014A1

公开(公告)日：2015-08-06

申请号：US14423227

申请日：2012-08-30

申请人： Takeshi Kawauchi ,  Tomohide Iida

发明人： Takeshi Kawauchi ,  Tomohide Iida

IPC分类号： G03G9/107 ,  G03G9/08

CPC分类号： G03G9/1075 ,  G03G5/107 ,  G03G9/0815 ,  G03G9/107 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

摘要： This invention is directed to a method for manufacturing carrier core particles for electrophotographic developer containing iron, manganese, and calcium as a core composition. The method includes (A) a mixing step of mixing an iron-containing raw material, a manganese-containing raw material, and a calcium-containing raw material to prepare a mixture thereof, (C) a granulation step of granulating the mixture after the mixing step, and (D) a firing step of firing a powdery material, which is obtained by granulating the mixture in the granulation step, at a predetermined temperature to form a magnetic phase. The calcium-containing raw material is provided in a granular form, and primary particles of the calcium-containing raw material have a volume mean diameter of 1 μm or less.

摘要翻译： 本发明涉及一种用于制造含有铁，锰和钙作为核心组合物的电子照相显影剂的载体芯颗粒的方法。 该方法包括（A）将含铁原料，含锰原料和含钙原料混合以制备其混合物的混合步骤，（C）将混合物制粒后的造粒步骤 混合步骤，和（D）烧制步骤，通过在制粒步骤中制粒混合物在预定温度下烧制粉末状材料，以形成磁性相。 含钙原料以粒状形式提供，含钙原料的一次粒子的体积平均粒径为1μm以下。

公开(公告)号：US20130344431A1

公开(公告)日：2013-12-26

申请号：US13641202

申请日：2012-03-01

申请人： Tomohide Iida ,  Tomoya Yamada ,  Takashi Fujiwara

发明人： Tomohide Iida ,  Tomoya Yamada ,  Takashi Fujiwara

IPC分类号： G03G9/10

CPC分类号： G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1136

摘要： The carrier core particles for electrophotographic developer have a volume size distribution with a median particle size ranging from 30 μm to 40 μm, the ratio of the carrier core particles having a diameter of 22 μm or lower in the volume size distribution is from 1.0% to 2.0%, the ratio of the carrier core particles having a diameter of 22 μm or lower in a number size distribution is 10% or lower, and the magnetization of the carrier core particles in an external magnetic field of 1000 Oe is from 50 emu/g to 75 emu/g.

摘要翻译： 用于电子照相显影剂的载体芯颗粒具有中值粒度范围为30μm至40μm的体积分布，体积尺寸分布中直径为22μm或更小的载体芯颗粒的比例为1.0％至 2.0％时，直径为22μm以下的载体芯颗粒的数量分布的比率为10％以下，并且在1000Oe的外部磁场中的载体芯颗粒的磁化强度为50emu / g至75emu / g。

公开(公告)号：US09651886B2

公开(公告)日：2017-05-16

申请号：US14423227

申请日：2012-08-30

申请人： Takeshi Kawauchi ,  Tomohide Iida

发明人： Takeshi Kawauchi ,  Tomohide Iida

IPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/08 ,  G03G5/10

CPC分类号： G03G9/1075 ,  G03G5/107 ,  G03G9/0815 ,  G03G9/107 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

摘要： This invention is directed to a method for manufacturing carrier core particles for electrophotographic developer containing iron, manganese, and calcium as a core composition. The method includes (A) a mixing step of mixing an iron-containing raw material, a manganese-containing raw material, and a calcium-containing raw material to prepare a mixture thereof, (C) a granulation step of granulating the mixture after the mixing step, and (D) a firing step of firing a powdery material, which is obtained by granulating the mixture in the granulation step, at a predetermined temperature to form a magnetic phase. The calcium-containing raw material is provided in a granular form, and primary particles of the calcium-containing raw material have a volume mean diameter of 1 μm or less.

公开(公告)号：US09034552B2

公开(公告)日：2015-05-19

申请号：US13641202

申请日：2012-03-01

申请人： Tomohide Iida ,  Tomoya Yamada ,  Takashi Fujiwara

发明人： Tomohide Iida ,  Tomoya Yamada ,  Takashi Fujiwara

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

CPC分类号： G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1136

摘要： The carrier core particles for electrophotographic developer have a volume size distribution with a median particle size ranging from 30 μm to 40 μm, the ratio of the carrier core particles having a diameter of 22 μm or lower in the volume size distribution is from 1.0% to 2.0%, the ratio of the carrier core particles having a diameter of 22 μm or lower in a number size distribution is 10% or lower, and the magnetization of the carrier core particles in an external magnetic field of 1000 Oe is from 50 emu/g to 75 emu/g.

摘要翻译： 用于电子照相显影剂的载体芯颗粒具有中值粒度范围为30μm至40μm的体积分布，体积尺寸分布中直径为22μm或更小的载体芯颗粒的比例为1.0％至 2.0％时，数均粒径分布中直径为22μm以下的载体芯颗粒的比率为10％以下，在1000Oe的外部磁场中的载体芯颗粒的磁化强度为50emu / g至75emu / g。

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：US09195157B2

公开(公告)日：2015-11-24

申请号：US13819823

申请日：2012-03-02

申请人： Takeshi Kawauchi ,  Tomohide Iida

发明人： Takeshi Kawauchi ,  Tomohide Iida

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

CPC分类号： G03G9/1075 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113

摘要： A method for manufacturing carrier core particles for electrophotographic developer including a slurrying step (A) of making an iron-containing raw material and a strontium-containing raw material into slurry, a granulation step (B) of granulating the slurry mixture obtained in the slurrying step, and a firing step (C) of firing a powdery material, which is obtained by granulating the slurry mixture in the granulation step, at a predetermined temperature to form a magnetic phase. The slurrying step makes the iron-containing raw material into the slurry containing the iron-containing raw material having a volume diameter D50 of 1.0 to 4.0 μm and a volume diameter D90 of 2.5 to 7.0 μm, and makes the strontium-containing raw material into the slurry so that the carrier core particles for electrophotographic developer contain 0

摘要翻译： 一种制造用于电子照相显影剂的载体芯颗粒的方法，包括将含铁原料和含锶原料制成浆料的浆化步骤（A），造粒步骤（B） 以及通过在造粒步骤中将浆料混合物造粒而获得的粉末状材料的焙烧步骤（C）在预定温度下形成磁性相。 制浆步骤使含铁原料成为含有体积直径D50为1.0〜4.0μm，体积直径D90为2.5〜7.0μm的含铁原料的浆料，使含锶原料成为 使得电子照相显影剂载体芯颗粒含有0

公开(公告)号：US20140017606A1

公开(公告)日：2014-01-16

申请号：US14005715

申请日：2012-03-19

申请人： Tomoya Yamada ,  Tomohide Iida

发明人： Tomoya Yamada ,  Tomohide Iida

IPC分类号： G03G9/107

CPC分类号： G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

摘要： A material expressed as a composition formula MXFe3-XO4 (where M is at least one of Mg and Mn, and 0≦X≦1) is a main component, and as a total amount, 0.1 to 2.5 weight percent of at least one of a Sr element and a Ca element is contained. Here, when ferrite particles are used as a carrier, in terms of obtaining a higher image density, the fluidity of the ferrite particles magnetized under a magnetic field of 1000/(4π) kA/m (1000 oersteds) is preferably 40 seconds or more. The residual magnetization σr is preferably 3 Am2/kg or more.

摘要翻译： 表示为组成式MXFe3-XO4（其中M为Mg和Mn中的至少一种，0≤X≤1）的材料为主要成分，总量为0.1〜2.5重量％ 包含Sr元素和Ca元素。 这里，作为载体使用铁氧体粒子时，为了获得更高的图像密度，在1000 /（4pi）kA / m（1000奥斯特）的磁场下磁化的铁氧体颗粒的流动性优选为40秒以上 。 剩余磁化强度优选为3Am 2 / kg以上。

公开(公告)号：US5143811A

公开(公告)日：1992-09-01

申请号：US597233

申请日：1990-10-15

申请人： Takayuki Itakura ,  Takashi Teshima ,  Tomohide Iida ,  Hirofumi Horio

发明人： Takayuki Itakura ,  Takashi Teshima ,  Tomohide Iida ,  Hirofumi Horio

IPC分类号： G03G9/097

CPC分类号： G03G9/09716

摘要： The present invention provides a toner composition comprising a toner and a hydrophobic silica composed of a fine powder of silica treated with a compound having a polymethylsilyl group in the molecule.