公开(公告)号：US5480755A

公开(公告)日：1996-01-02

申请号：US293115

申请日：1994-08-19

申请人： Masaki Uchiyama ,  Yoshinobu Jo ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

发明人： Masaki Uchiyama ,  Yoshinobu Jo ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G9/09 ,  G03G9/097

CPC分类号： G03G9/09783 ,  G03G9/091 ,  G03G9/09716

摘要： A magnetic toner has magnetic resin particles containing at least a binder resin, a charge control agent and a magnetic powder. The surface-modified fine silica powder being a fine silica powder has been treated with a hydrophobicizing agent. The fine silica powder has a specific surface area of not less than 180 m.sup.2 /g, a hydrophobicity of from 60% to 95% and a bulk density of from 35 g/lit. to 49 g/lit.

摘要翻译： 磁性调色剂具有至少含有粘合剂树脂，电荷控制剂和磁性粉末的磁性树脂颗粒。 作为二氧化硅微粉末的表面改性微细二氧化硅粉末已经用疏水剂处理。 二氧化硅微粉末的比表面积不小于180m 2 / g，疏水性为60％至95％，堆积密度为35g / l。 至49克/升。

公开(公告)号：US5500318A

公开(公告)日：1996-03-19

申请号：US266478

申请日：1994-06-27

申请人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Yoshinobu Joh ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

发明人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Yoshinobu Joh ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G13/20 ,  G03G15/20

CPC分类号： G03G9/0821 ,  G03G9/08797

摘要： A toner for developing an electrostatic image is constituted by a binder resin and a colorant The binder resin is characterized by containing at least 20 wt. % of an extraction residue after 6 hours of extraction and below 20 wt. % of an extraction residue after 72 hours of extraction respectively by Soxhlet extraction with tetrahydrofuran. The toner shows a dynamic modulus and a loss modulus, respectively at 200.degree. C. and 0.1 Hz, which are substantially unchanging with time. The properties provide the toner with a harmonization of anti-offset characteristic and fixability as well as stable viscoelasticity under heating.

摘要翻译： 用于显影静电图像的调色剂由粘合剂树脂和着色剂构成。粘合剂树脂的特征在于含有至少20重量％ 提取6小时后的提取残留物的％和低于20wt。 通过索氏提取用四氢呋喃分别提取72小时后的提取残留物的％。 调色剂分别在200℃和0.1Hz下分别显示出动态模量和损耗模量，其随时间基本上不变。 这些特性为调色剂提供了抗补偿特性和定影性的一致性以及在加热下的稳定的粘弹性。

公开(公告)号：US5504272A

公开(公告)日：1996-04-02

申请号：US246754

申请日：1994-05-20

申请人： Masaki Uchiyama ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

发明人： Masaki Uchiyama ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G13/09 ,  G03G15/09 ,  G03G15/08

CPC分类号： G03G13/09 ,  G03G15/0907 ,  G03G9/0819 ,  G03G9/08795

摘要： An image forming method in which a toner-carrying member for carrying a specific magnetic toner is placed adjacent a latent image-bearing member for carrying an electrostatic latent image so as to form a developing region of a predetermined gap size. The magnetic toner on the toner-carrying member forms a toner layer of a regulated thickness smaller than the above-mentioned gap. An asymmetric bias is applied to the magnetic toner so as to cause the magnetic toner from the toner-carrying member to be conveyed to the latent image-bearing member thereby to develop the electrostatic latent image.

摘要翻译： 一种图像形成方法，其中用于承载特定磁性调色剂的调色剂承载构件邻近用于承载静电潜像的潜像承载构件放置以形成预定间隙尺寸的显影区域。 调色剂承载构件上的磁性调色剂形成的调色剂层的厚度小于上述间隙。 对磁性调色剂施加不对称偏压，使得来自调色剂承载构件的磁性调色剂被输送到潜像承载部件，从而显影静电潜像。

公开(公告)号：US5330871A

公开(公告)日：1994-07-19

申请号：US797915

申请日：1991-11-26

申请人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Yoshinobu Joh ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

发明人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Yoshinobu Joh ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G13/20 ,  G03G15/20 ,  G03G9/00

CPC分类号： G03G9/0821 ,  G03G9/08797

摘要： A toner for developing an electrostatic image is constituted by a binder resin and a colorant. The binder resin is characterized by containing at least 20 wt. % of an extraction residue after 6 hours of extraction and below 20 wt. % of an extraction residue after 72 hours of extraction respectively by Soxhlet extraction with tetrahydrofuran. The toner shows a dynamic modulus and a loss modulus, respectively at 200.degree. C. and 0.1 Hz, which are substantially unchanging with time. The properties provide the toner with a harmonization of anti-offset characteristic and fixability as well as stable viscoelasticity under heating.

摘要翻译： 用于显影静电图像的调色剂由粘合剂树脂和着色剂构成。 粘合剂树脂的特征在于含有至少20wt。 提取6小时后的提取残留物的％和低于20wt。 通过索氏提取用四氢呋喃分别提取72小时后的提取残留物的％。 调色剂分别在200℃和0.1Hz下分别显示出动态模量和损耗模量，其随时间基本上不变。 这些特性为调色剂提供了抗补偿特性和定影性的一致性，以及在加热下的稳定的粘弹性。

公开(公告)号：US5268248A

公开(公告)日：1993-12-07

申请号：US798643

申请日：1991-11-26

申请人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Yoshinobu Joh ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno ,  Kazuyoshi Hagiwara

发明人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Yoshinobu Joh ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno ,  Kazuyoshi Hagiwara

IPC分类号： G03G9/087 ,  G03G9/09 ,  G03G9/097

CPC分类号： G03G9/08708 ,  G03G9/08706 ,  G03G9/08793 ,  G03G9/08795

摘要： A toner for developing an electrostatic image is provided as a pulverized mixture including a binder resin and a colorant. The binder resin is characterized by a molecular weight distribution on a GPC chromatogram of its tetrahydrofuran (THF)-soluble resin content including below 15% of a resin component in a molecular weight region of at most 5000 and at least 5 wt. % of a resin component in a molecular weight region of at least 5.times.10.sup.6 and showing a main peak in a molecular weight region of 5000 to 5.times.10.sup.6. The THF-soluble resin component in the molecular weight region of at least 5.times.10.sup.6 is extremely enriched during a melt-kneading step during the toner production, so as to effectively prevent toner flowout from a member for cleaning a fixing roller.

公开(公告)号：US5212524A

公开(公告)日：1993-05-18

申请号：US937114

申请日：1992-08-31

申请人： Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaki Uchiyama ,  Makoto Unno ,  Masaaki Taya

发明人： Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaki Uchiyama ,  Makoto Unno ,  Masaaki Taya

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087

CPC分类号： G03G9/0819 ,  G03G9/0835 ,  G03G9/0838 ,  G03G9/08733

摘要： A toner for developing electrostatic images, comprises a binder resin and a colorant, wherein the binder resin comprises a vinyl copolymer having an acid anhydride group, and the binder resin has a total acid value (A) of 2-100 mgKOH/g and a total acid value (B) attributable to acid anhydride group of below 6 mgKOH/g so that [(B)/(A)].times.100 is 60% or less. Because the binder resin has a specified acid value partly attributable to acid anhydride group, the toner is provided with an adequate balance between chargeability and dischargeability, so that the toner shows a stable performance under various environmental conditions. The toner is particularly advantageously constituted as a magnetic toner of fine particle sizes suitably used under application of unsymmetrical alternating bias electric field.

摘要翻译： 用于显影静电图像的调色剂包括粘合剂树脂和着色剂，其中粘合剂树脂包括具有酸酐基的乙烯基共聚物，并且粘合剂树脂的总酸值（A）为2-100mgKOH / g，和 归因于酸酐基团的总酸值（B）低于6mgKOH / g，使得[（B）/（A）]×100为60％以下。 由于粘合剂树脂具有部分归因于酸酐基团的特定酸值，因此调色剂在带电性和放电性之间具有足够的平衡，使得调色剂在各种环境条件下显示出稳定的性能。 调色剂特别有利地构成为适用于不对称交流偏压电场的细粒度的磁性调色剂。

公开(公告)号：US5169738A

公开(公告)日：1992-12-08

申请号：US604207

申请日：1990-10-29

申请人： Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaki Uchiyama ,  Makoto Unno ,  Masaaki Taya

发明人： Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaki Uchiyama ,  Makoto Unno ,  Masaaki Taya

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087

CPC分类号： G03G9/0819 ,  G03G9/0835 ,  G03G9/0838 ,  G03G9/08733

摘要： A toner for developing electrostatic images, comprises a binder resin and a colorant, wherein the binder resin comprises a vinyl copolymer having an acid anhydride group, and the binder resin has a total acid value (A) of 2-100 mgKOH/g and a total acid value (B) attributable to acid anhydride group of below 6 mgKOH/g so that [(B)/(A)].times.100 is 60% or less. Because the binder resin has a specified acid value partly attributable to acid anhydride group, the toner is provided with an adequate balance between chargeability and dischargeability, so that the toner shows a stable performance under various environmental conditions. The toner is particularly advantageously constituted as a magnetic toner of fine particle sizes suitably used under application of unsymmetrical alternating bias electric field.

公开(公告)号：US5348829A

公开(公告)日：1994-09-20

申请号：US972540

申请日：1992-11-06

申请人： Masaki Uchiyama ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

发明人： Masaki Uchiyama ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G13/09 ,  G03G9/083

CPC分类号： G03G13/09 ,  G03G9/0819 ,  G03G9/09708

摘要： A monocomponent-type developer for developing electrostatic images, includes a magnetic toner containing at least a binder resin and magnetic powder, and 0.5-10 wt. % (based on the magnetic toner) of inorganic fine powder having a length-average particle size of 0.1-5 .mu.m. The developer has a number-basis particle size distribution such that particles of 4 .mu.m or smaller are contained at 5-18% by number and particles of 4-10 .mu.m are contained at at least 60% by number. The developer has a volume basis particle size distribution such that particles of 12.7 .mu.m or larger are contained at at most 10% by volume. The developer has a weight-average particle size of 7-11 .mu.m. The developer is particularly useful for development under application of a DC-superposed asymmetric AC bias electric field including a development-side voltage component with a larger magnitude and a shorter duration than a reverse development-side voltage component.

摘要翻译： 用于显影静电图像的单组分型显影剂包括至少含有粘合剂树脂和磁性粉末的磁性调色剂，和0.5-10重量％ ％（基于磁性调色剂）的无机细粉末，其长度平均粒径为0.1-5μm。 显影剂具有数量的粒度分布，使得4μm或更小的颗粒以5-18％数量包含，并且至少60％的数量包含4-10μm的颗粒。 显影剂的体积基础粒径分布使得12.7μm或更大的颗粒的含量至多为10体积％。 显影剂的重均粒径为7-11μm。 显影剂对于在施加直流叠加非对称AC偏置电场下的开发特别有用，该电场包括具有比反向显影侧电压分量更大的幅度和更短持续时间的显影侧电压分量。

公开(公告)号：US5338894A

公开(公告)日：1994-08-16

申请号：US763253

申请日：1991-09-20

申请人： Masaki Uchiyama ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

发明人： Masaki Uchiyama ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G13/09 ,  G03G15/09 ,  G03G15/08

CPC分类号： G03G13/09 ,  G03G15/0907 ,  G03G9/0819 ,  G03G9/08795

摘要： An image forming method in which a toner-carrying member for carrying a specific magnetic toner is placed adjacent a latent image-bearing member for carrying an electrostatic latent image so as to form a developing region of a predetermined gap size. The magnetic toner on the toner-carrying member forms a toner layer of a regulated thickness smaller than the above-mentioned gap. An asymmetric bias is applied to the magnetic toner so as to cause the magnetic toner from the toner-carrying member to be conveyed to the latent image-bearing member thereby to develop the electrostatic latent image.

摘要翻译： 一种图像形成方法，其中用于承载特定磁性调色剂的调色剂承载构件邻近用于承载静电潜像的潜像承载构件放置以形成预定间隙尺寸的显影区域。 调色剂承载构件上的磁性调色剂形成的调色剂层的厚度小于上述间隙。 对磁性调色剂施加不对称偏压，使得来自调色剂承载构件的磁性调色剂被输送到潜像承载部件，从而显影静电潜像。

公开(公告)号：US5296326A

公开(公告)日：1994-03-22

申请号：US994473

申请日：1992-12-21

申请人： Masaaki Taya ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Makoto Unno ,  Masaki Uchiyama ,  Kiichiro Sakashita

发明人： Masaaki Taya ,  Hirohide Tanikawa ,  Yasutaka Akashi ,  Makoto Unno ,  Masaki Uchiyama ,  Kiichiro Sakashita

IPC分类号： G03G9/083

CPC分类号： G03G9/0833

摘要： A magnetic toner for electrophotography having stable triboelectric chargeability under various environmental conditions may be provided by using magnetic iron oxide particles having a moderately high surface Feo content, specified by the following conditions: (a) a dissolved Fe (II) content in dissolved total iron of 14-33.3 wt. % at a dissolved total iron percentage of 5.+-.1 wt. %, (b) a dissolved Fe (II) content in dissolved total iron of 17-33.3 wt. % at a dissolved total iron percentage of 10.+-.1 wt. %, and (c) a dissolved Fe (II) content in dissolved total iron of 18-33.3 wt. % at a dissolved total iron percentage of 15.+-.1 wt.

摘要翻译： 可以通过使用具有适度高的表面Feo含量的磁性氧化铁颗粒来提供在各种环境条件下具有稳定的摩擦带电性的电子照相用磁性调色剂，其特征在于以下条件：（a）溶解的总铁中溶解的Fe（II）含量 为14-33.3重量％ ％的溶解总铁百分比为5 + -1wt。 ％，（b）溶解的总铁中溶解的Fe（II）含量为17-33.3wt。 ％的溶解总铁百分比为10 + 1wt。 ％，和（c）溶解的总铁中溶解的Fe（II）含量为18-33.3wt。 ％的溶解总铁百分比为15 + 1重量％。