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％。

公开(公告)号：US5219946A

公开(公告)日：1993-06-15

申请号：US611705

申请日：1990-11-08

申请人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Tsutomu Kukimoto ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno ,  Seiichi Takagi

发明人： Hirohide Tanikawa ,  Masaki Uchiyama ,  Tsutomu Kukimoto ,  Yasutaka Akashi ,  Masaaki Taya ,  Makoto Unno ,  Seiichi Takagi

IPC分类号： G03G9/087

CPC分类号： G03G9/08733 ,  G03G9/08726

摘要： A binder resin comprises a vinyl copolymer, a mixture of vinyl copolymers, or a mixture of a vinyl copolymer and a vinyl polymer. A resin component with a molecular weight of not more than 10,000 is contained in an amount of from 5 to 50% by weight based on the whole resin. The vinyl copolymer or the mixture of vinyl copolymers has an acid anhydride group and a carboxyl group.

摘要翻译： 粘合剂树脂包括乙烯基共聚物，乙烯基共聚物的混合物或乙烯基共聚物和乙烯基聚合物的混合物。 基于整个树脂，分子量不超过10,000的树脂组分的含量为5-50重量％。 乙烯基共聚物或乙烯基共聚物的混合物具有酸酐基和羧基。

公开(公告)号：US06316157B1

公开(公告)日：2001-11-13

申请号：US09610914

申请日：2000-07-05

申请人： Junko Yoshikawa ,  Kenji Okado ,  Masaaki Taya ,  Yushi Mikuriya ,  Kazumi Yoshizaki ,  Yasushi Katsuta ,  Kenichi Nakayama

发明人： Junko Yoshikawa ,  Kenji Okado ,  Masaaki Taya ,  Yushi Mikuriya ,  Kazumi Yoshizaki ,  Yasushi Katsuta ,  Kenichi Nakayama

IPC分类号： G03G9097

CPC分类号： G03G9/09708 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/09783

摘要： A non-metallic black toner is disclosed. The toner has toner particles containing at least a binder resin, a carbon black and an organometallic compound, and an external additive. The toner particles contain 10 to 200 ppm of at least one kind of alkali metal element and at least one kind of organometallic compound. The toner particles further contain a polyester resin. The non-metallic black toner has a weight-average particle diameter of 4 to 11 &mgr;m, the following loss tangents tan &dgr; shown by dielectric loss factor ∈″/dielectric constant ∈′ at frequencies of 5×104 Hz and 105 Hz: tan &dgr; (5×104 Hz)≦0.0125 tan &dgr; (105 Hz)≦0.0105, a Carr's flowability index of 50 or more, and a Carr's floodability index of 65 or more. Also, an image forming method is disclose using the black toner.

摘要翻译： 公开了一种非金属黑色调色剂。 调色剂具有至少含有粘合剂树脂，炭黑和有机金属化合物的调色剂颗粒和外部添加剂。 调色剂颗粒含有10-200ppm的至少一种碱金属元素和至少一种有机金属化合物。 调色剂颗粒还含有聚酯树脂。 非金属黑色调色剂的重均粒径为4〜11μm，频率为5×104Hz，105Hz时的介电损耗因子∈“/介电常数ε'表示的以下损耗正切tanδ：卡尔的流动性 指数为50以上，卡尔的防洪指数为65以上。 此外，使用黑色调色剂公开了图像形成方法。

公开(公告)号：US06187490B1

公开(公告)日：2001-02-13

申请号：US09526473

申请日：2000-03-15

申请人： Masaaki Taya ,  Takaaki Kohtaki ,  Yasuhiro Ichikawa

发明人： Masaaki Taya ,  Takaaki Kohtaki ,  Yasuhiro Ichikawa

IPC分类号： G03G1301

CPC分类号： G03G9/10 ,  G03G9/107

摘要： A two-component developer suitable for electrophotography is formed of a toner and a resin-coated carrier. The resin-coated carrier is formed of carrier core particles and 0.01-2.0 wt. % based on the carrier core particles of a resin coating layer coating the carrier core particles. The resin-coated carrier has an average particle size of 25-55 &mgr;m and the carrier core particles comprise a ferrite component represented by formula (I) below: (Fe2O3)a(MnO)b(MgO)c(A)d  (I), wherein A represents a mixture of SrO, CaO and Al2O3, and a, b, c and d are numbers representing mol fractions of associated components and satisfying: 0.4

摘要翻译： 适用于电子照相术的双组分显影剂由调色剂和树脂涂布载体形成。 树脂涂层载体由载体芯颗粒和0.01-2.0重量％ 基于载体芯颗粒的载体芯颗粒涂覆载体芯颗粒。 树脂涂布载体的平均粒径为25-55μm，载体芯粒子包含由下式（I）表示的铁氧体组分：其中A表示SrO，CaO和Al 2 O 3的混合物，a，b，c d表示相关成分的摩尔分数，满足：0.4

公开(公告)号：US5578409A

公开(公告)日：1996-11-26

申请号：US543871

申请日：1995-11-15

申请人： Takaaki Kotaki ,  Masaaki Taya ,  Makoto Unno ,  Yushi Mikuriya ,  Tadashi Dojyo

发明人： Takaaki Kotaki ,  Masaaki Taya ,  Makoto Unno ,  Yushi Mikuriya ,  Tadashi Dojyo

IPC分类号： G03G9/087

CPC分类号： G03G9/08755 ,  G03G9/08793 ,  Y10S430/104

摘要： A toner for developing an electrostatic image has a binder resin and a colorant.The binder resin contains a polyester resin at least part of which has a long-chain alkyl group having 22 to carbon atoms and has a hydroxyl group or a carboxyl group at its terminal.

摘要翻译： 用于显影静电图像的调色剂具有粘合剂树脂和着色剂。 粘合剂树脂含有至少一部分具有22个碳原子的长链烷基并在其末端具有羟基或羧基的聚酯树脂。

公开(公告)号：US5547796A

公开(公告)日：1996-08-20

申请号：US276509

申请日：1994-07-18

申请人： Takaaki Kohtaki ,  Masaaki Taya ,  Masami Fujimoto

发明人： Takaaki Kohtaki ,  Masaaki Taya ,  Masami Fujimoto

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/097 ,  G03G9/083 ,  G03G9/00 ,  G03G9/10 ,  G03G9/107

CPC分类号： G03G9/0819 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09708 ,  Y10S430/104

摘要： A developer for developing an electrostatic image is constituted by an insulating magnetic toner, inorganic fine powder and a flowability-improving agent having a BET specific surface area of at least 30 m.sup.2 /g. The insulating magnetic toner has a weight-average particle size (t-D.sub.4) of 4-14 .mu.m, a number-average particle size (t-D.sub.1) of 1-10 .mu.m, and a ratio (t-D.sub.4)/(t-D.sub.1) of 1.01-2. The inorganic fine powder has a weight-average particle size (m-D.sub.4) of 0.6-5 .mu.m, a number-average particle size (m-D.sub.1) of 0.5-4 .mu.m, and a ratio (m-D.sub.4)/(m-D.sub.1) which is in the range of 1.0-2.4 and is equal to or larger than the ratio (t-D.sub.4)/(t-D.sub.1). The inorganic fine powder is contained in an amount which is 2-8 times that of the flowability-improving agent by weight. The developer is able to retain stable developing performances by effecting suppressing preferential consumption of a particular particle size fraction in a long term of successive copying.

摘要翻译： 用于显影静电图像的显影剂由绝缘磁性调色剂，无机细粉末和BET比表面积至少为30m 2 / g的流动性改进剂构成。 绝缘磁性调色剂的重均粒径（t-D4）为4〜14μm，数均粒径（t-D1）为1-10μm，比例（t-D4）/ （t-D1）为1.01-2。 无机细粉末的重均粒径（m-D4）为0.6〜5μm，数均粒径（m-D1）为0.5〜4μm，比率（m-D4）/ （m-D1）在1.0-2.4的范围内，并且等于或大于比率（t-D4）/（t-D1）。 无机细粉末的含量为流动性改进剂重量的2-8倍。 显影剂能够通过在长时间连续复制中抑制特定粒度分数的优先消耗来保持稳定的显影性能。

公开(公告)号：US5483327A

公开(公告)日：1996-01-09

申请号：US398791

申请日：1995-03-06

申请人： Masaaki Taya ,  Takaaki Kohtaki ,  Makoto Unno ,  Tadashi Doujo

发明人： Masaaki Taya ,  Takaaki Kohtaki ,  Makoto Unno ,  Tadashi Doujo

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G15/06

CPC分类号： G03G9/08755 ,  G03G9/0819 ,  G03G9/091

摘要： An image forming apparatus and a process cartridge includes a toner for developing an electrostatic image that is constituted by at least a binder resin and a charge control agent. The binder resin has an acid value of 5-50. The charge control agent includes an iron complex represented by the following formula: ##STR1## wherein X.sub.1 and X.sub.2 independently denote hydrogen atom, lower alkyl group, lower alkoxy group, nitro group or halogen atom; m and m' denote an integer of 1-3; R.sub.1 and R.sub.3 independently denote hydrogen atom, C.sub.1-18 alkyl or alkenyl, sufonamide, mesyl, sulfonic acid group, carboxy ester group, hydroxy, C.sub.1-18 alkoxy, acetylamino, benzoylamino or halogen atom; n and n' denote an integer of 1-3; R.sub.2 and R.sub.4 denote hydrogen atom or nitro group; and A.sup.+ denotes hydrogen ion, sodium ion, potassium ion or ammonium ion. The toner has a weight-average particle size (D.sub.4) of 4-9 .mu.m and including toner particles having a particle size of 5 .mu.m or smaller at 3-90% by number, toner particles having a particle size of 6.35-10.08 .mu.m at 1-80% by number and toner particles having a particle size of 12.7 .mu.m or larger at a percentage by volume of at most 2.0%, wherein the toner particles having a particle size of 5.0 .mu.m or smaller are contained at N % by number and at V % by volume satisfying a relationship:N/V=0.05N+k,wherein k is a positive number in the range of 3.0-7.5.

摘要翻译： 图像形成装置和处理盒包括用于显影由至少粘合剂树脂和电荷控制剂构成的静电图像的调色剂。 粘合剂树脂的酸值为5-50。 电荷控制剂包括由下式表示的铁络合物：其中X1和X2独立地表示氢原子，低级烷基，低级烷氧基，硝基或卤原子; m和m'表示1-3的整数; R1和R3独立地表示氢原子，C1-18烷基或烯基，磺酰胺，甲磺酰基，磺酸基，羧基酯基，羟基，C1-18烷氧基，乙酰氨基，苯甲酰氨基或卤素原子; n和n'表示1-3的整数; R2和R4表示氢原子或硝基; A +表示氢离子，钠离子，钾离子或铵离子。 调色剂的重均粒径（D4）为4-9μm，包括粒径为5μm以下的调色剂颗粒为3-90％，调色剂颗粒的粒径为6.35-10.08 以数量为1-80％的粒径和粒径为12.7μm或更大的调色剂颗粒，其体积百分比至多为2.0％，其中粒径为5.0μm或更小的调色剂颗粒包含在 N％数，体积V％满足关系：N / V = 0.05N + k，其中k为3.0-7.5范围内的正数。

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：US5202731A

公开(公告)日：1993-04-13

申请号：US935431

申请日：1992-08-26

申请人： Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaaki Taya ,  Kuniko Kobayashi ,  Masaki Uchiyama

发明人： Hirohide Tanikawa ,  Yasutaka Akashi ,  Masaaki Taya ,  Kuniko Kobayashi ,  Masaki Uchiyama

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

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

摘要： An image forming apparatus is formed by providing a latent image-bearing member for holding an electrostatic image thereon and a toner-carrying member for carrying a prescribed magnetic toner comprising a binder resin and magnetic powder and having a particle size distribution including 12% by number or more of magnetic toner particles of 5 microns or smaller, 33% by number or less of magnetic toner particles of 8-12.7 microns and 2% by volume or less of magnetic toner particles of 16 microns or larger so as to provide a volume-average particle size of 4-10 microns. At the developing station, an alternating bias voltage comprising a DC voltage and an unsymmetrical AC voltage in superposition is applied between the toner-carrying member and the latent image-bearing member to provide an alternating bias electric field comprising a development-side voltage component and a reverse-development side voltage component. The development-side voltage component has a magnitude equal to or larger than that of the reverse development-side voltage component and a duration smaller than that of the reverse-development side voltage component, so that the magnetic toner on the toner-carrying member, particularly fine powdery fraction thereof effective for high-quality development, is effectively transferred to the latent image-bearing member to develop the electrostatic image thereon at the developing station.

摘要翻译： 通过在其上提供用于保持静电图像的潜像承载部件和用于承载包含粘合剂树脂和磁粉的规定的磁性调色剂的调色剂承载部件形成图像形成装置，其粒度分布包括12数量级 或更多的8微米或更小的磁性调色剂颗粒，8-12.7微米的磁性调色剂颗粒的数量少于33％，以及16微米或更大的磁性调色剂颗粒的2体积％以下的磁性调色剂颗粒， 平均粒径为4-10微米。 在显影站，在调色剂承载构件和潜像承载构件之间施加包括直流电压和不对称交流电压的交替偏置电压，以提供包括显影侧电压分量的交流偏置电场和 反向显影侧电压分量。 显影侧电压分量的幅度等于或大于反显影侧电压分量的幅度，并且持续时间小于反向显影侧电压分量的幅度，使得调色剂承载元件上的磁性调色剂， 特别是对于高质量显影有效的细粉末级分有效地转移到潜像承载部件，以在显影站上显影静电图像。