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    Magnetic toner, magnetic developer, apparatus unit, image forming apparatus and facsimile apparatus
    1.
    发明授权
    Magnetic toner, magnetic developer, apparatus unit, image forming apparatus and facsimile apparatus 失效
    磁性调色剂，磁性显影剂，装置单元，图像形成装置和传真装置

    公开(公告)号：US5424810A

    公开(公告)日：1995-06-13

    申请号：US942840

    申请日：1992-09-10

    申请人： Koichi Tomiyama ,  Hiroyuki Suematsu ,  Masayoshi Kato ,  Hiroshi Yusa ,  Takakuni Kobori

    发明人： Koichi Tomiyama ,  Hiroyuki Suematsu ,  Masayoshi Kato ,  Hiroshi Yusa ,  Takakuni Kobori

    IPC分类号： G03G9/083 ,  G03G15/09

    CPC分类号： G03G9/0834

    摘要： A magnetic toner for electrophotography is composed from a binder resin and a silicon-containing magnetic iron oxide. The magnetic toner has a weigh-average particle size o at most 13.5 .mu.m and has a particle size distribution such that it contains o more than 50 wt, % of magnetic toner particles having a particle size of at least 12.7 .mu.m. The magnetic toner is able to show high developing performances because of richness in fine particles and is also provided with an improved environmental stability because the magnetic iron oxide used therein contains 0.5-4 wt, % silicon (based on total iron content) and has a specific silicon distribution such that the magnetic iron oxide has a total silicon content (A), a silicon content (B) dissolved together with the magnetic iron oxide when the magnetic iron oxide is dissolved up to 20 wt, % dissolution of iron, and a superficial silicon content (C), satisfying relations of B/A=44-84% and C/A=10-55%. The performances are enhanced if the magnetic toner is blended with additives such as inorganic fine powder or resin fine particles.

    摘要翻译： 用于电子照相的磁性调色剂由粘合剂树脂和含硅磁性氧化铁组成。 磁性调色剂具有至多13.5μm的重均粒径，并且具有使其含有超过50重量％的粒径至少为12.7μm的磁性调色剂颗粒的粒度分布。 磁性调色剂由于细颗粒的丰富性而能够显示高显影性能，并且由于其中使用的磁性氧化铁含有0.5-4重量％的硅（基于总铁含量）并具有改善的环境稳定性，并且具有 磁性氧化铁具有总硅含量（A），当磁性氧化铁被溶解时与磁性氧化铁溶解在一起的硅含量（B）高达20重量％，铁溶解度高， 表面硅含量（C），满足B / A = 44-84％和C / A = 10-55％的关系。 如果将磁性调色剂与无机细粉或树脂微粒等添加剂混合，则性能得到提高。

    Process cartridge
    2.
    发明授权
    Process cartridge 失效
    处理墨盒

    公开(公告)号：US6002895A

    公开(公告)日：1999-12-14

    申请号：US892913

    申请日：1997-07-15

    申请人： Takashige Kasuya ,  Hiroyuki Suematsu ,  Koichi Tomiyama ,  Hiroshi Yusa ,  Takakuni Kobori ,  Masaichiro Katada

    发明人： Takashige Kasuya ,  Hiroyuki Suematsu ,  Koichi Tomiyama ,  Hiroshi Yusa ,  Takakuni Kobori ,  Masaichiro Katada

    IPC分类号： G03G9/083 ,  G03G9/087 ,  G03G21/16

    CPC分类号： G03G9/0834 ,  G03G9/08795

    摘要： A toner is comprised of a composition containing at least a polymer component and a charge control agent. The polymer component contains substantially no tetrahydrofuran (THF)-insoluble matter. The polymer component THF-soluble has a major peak and a minor peak in the specific molecular weight regions in gel permeation chromatography (GPC). The low molecular weight component and high molecular weight component of the polymer component, each of which shows the specific molecular weight region in GPC, have the specific acid values, respectively. The difference between the acid values is in the specific range.

    摘要翻译： 调色剂由至少含有聚合物组分和电荷控制剂的组合物组成。 聚合物组分基本上不含四氢呋喃（THF） - 不溶物质。 在凝胶渗透色谱（GPC）中，可溶于THF的聚合物组分在特定分子量区域具有主峰和次峰。 聚合物组分的低分子量组分和高分子量组分分别具有特定的酸值，分别表示GPC中的特定分子量区域。 酸值之间的差异在特定范围内。

    Production of toner for developing electrostatic images
    5.
    发明授权
    Production of toner for developing electrostatic images 失效
    生产用于显影静电图像的调色剂

    公开(公告)号：US5464722A

    公开(公告)日：1995-11-07

    申请号：US176231

    申请日：1994-01-03

    申请人： Koichi Tomiyama ,  Hiroshi Yusa ,  Takakuni Kobori

    发明人： Koichi Tomiyama ,  Hiroshi Yusa ,  Takakuni Kobori

    IPC分类号： C09C1/30 ,  C09C1/36 ,  G03G9/08 ,  G03G9/087

    CPC分类号： C09C1/3081 ,  C09C1/3684 ,  G03G9/081 ,  G03G9/0817 ,  C01P2004/61

    摘要： A toner for developing electrostatic images is produced through a process including the steps of: pre-mixing binder resin particles carrying or containing inorganic fine powder to prepare a premix; melt-kneading the premix to obtain a kneaded product; cooling the kneaded product to obtain a colored resinous solid; pulverizing the colored resinous solid to obtain a pulverized product; and classifying the pulverized product to obtain toner particles. The inclusion of the resin particles carrying or containing inorganic fine powder improves the performance of the pre-mixing to provide an improved dispersion of toner materials within the product toner particles. A fine powder fraction from the classifying step can also be recycled to the premixing step. The resin particles can be toner particles per se. The inorganic fine powder may preferably be silica fine powder treated with silicone oil.

    摘要翻译： 通过包括以下步骤的方法生产用于静电图像显影的调色剂：预先混合携带或含有无机细粉末的粘合剂树脂颗粒以制备预混物; 熔融捏合预混物以获得捏合产物; 冷却捏合产物得到有色树脂固体; 粉碎着色树脂固体，得到粉碎物; 并对粉碎产物进行分级以获得调色剂颗粒。 携带或含有无机细粉末的树脂颗粒的包含改善了预混合的性能，以提供调色剂材料在产品调色剂颗粒内的改进的分散体。 来自分级步骤的细粉末部分也可以再循环到预混合步骤。 树脂颗粒本身可以是调色剂颗粒。 无机细粉末优选为用硅油处理的二氧化硅细粉末。