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    Image forming method and image forming apparatus
    1.
    发明授权
    Image forming method and image forming apparatus 失效
    图像形成方法和图像形成装置

    公开(公告)号：US5215845A

    公开(公告)日：1993-06-01

    申请号：US779808

    申请日：1991-10-21

    申请人： Hiroshi Yusa ,  Kohichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Kiyoko Tsuchiya

    发明人： Hiroshi Yusa ,  Kohichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Kiyoko Tsuchiya

    IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G13/09 ,  G03G13/26 ,  G03G15/08 ,  G03G15/09

    CPC分类号： G03G9/0823 ,  G03G13/09 ,  G03G15/0928 ,  G03G9/0819 ,  G03G9/0821

    摘要： An electrostatic image supporting member which supports an electrostatic image and a toner carrying member for conveying a magnetic toner are disposed in a development section with a specified gap therebetween. The toner carrying member has a base whose surface has an average surface roughness (Ra) of 1.0 to 3.0 .mu.m. A resin coating containing electrically conductive fine particles is formed on the base surface at a density of 4 to 12 g per 1 m.sup.2. The outer layer of the coating has an Ra from 0.8 to 3.0 .mu.m. The toner carrying member carries an electrically insulating magnetic toner containing at least a binder resin and a magnetic component, and satisfying the conditions of a volumetric average particle size of 4.5 to 8 .mu.m, a BET specific surface area of 1.8 to 3.5 m.sup.2 /g, a charge amount of -20 to -35 .mu.c/g, a loose-state apparent density of 0.40 to 0.52 g/cm.sup.3, and a true specific gravity of 1.45 to 1.8. The magnetic toner is formed into a layer having a thickness smaller than the dimension of the gap by a member for regulating the thickness by pressing the toner against the toner carrying member. The magnetic toner is then conveyed to the development section, in which the toner develops the electrostatic image while an AC electric field is applied.

    摘要翻译： 支撑静电图像的静电图像支撑构件和用于输送磁性调色剂的调色剂承载构件以其间具有特定间隙的方式设置在显影区域中。 调色剂承载构件具有表面的平均表面粗糙度（Ra）为1.0〜3.0μm的基材。 含有导电性微粒的树脂被膜以4〜12g / 1m 2的密度形成在基材表面上。 涂层的外层的Ra为0.8〜3.0μm。 调色剂承载构件承载至少含有粘合剂树脂和磁性组分的电绝缘磁性调色剂，并且满足体积平均粒径为4.5至8μm的条件，BET比表面积为1.8至3.5m 2 / g ，电荷量为-20〜-35μC/ g，松散状态表观密度为0.40〜0.52g / cm 3，真比重为1.45〜1.8。 磁性调色剂通过将调色剂压靠在调色剂承载部件上而调节厚度的部件形成为厚度小于间隙尺寸的层。 然后将磁性调色剂输送到显影部分，其中调色剂在施加AC电场时显影静电图像。

    Toner for developing electrostatic image and process for production thereof
    2.
    发明授权
    Toner for developing electrostatic image and process for production thereof 失效
    用于显影静电图像的调色剂及其生产方法

    公开(公告)号：US5338638A

    公开(公告)日：1994-08-16

    申请号：US797992

    申请日：1991-11-26

    申请人： Kiyoko Tsuchiya ,  Koichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Hiroshi Yusa

    发明人： Kiyoko Tsuchiya ,  Koichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Hiroshi Yusa

    IPC分类号： G03G9/087

    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 at least 15% and below 35% of a resin component in a molecular weight region of at most 5000 and at least 3 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 10.sup.5. The binder resin also has an acid value of 2-100 mg KOH/g. The THF-soluble resin component in the molecular weight region of at least 5.times.10.sup.6 is enriched during a melt-kneading step during the toner production.

    摘要翻译： 提供用于显影静电图像的调色剂作为包括粘合剂树脂和着色剂的粉碎混合物。 粘合剂树脂的特征在于其四氢呋喃（THF）可溶性树脂含量的GPC色谱图中的分子量分布，其包含至少15％且低于35％的分子量区域中的树脂组分的至多5000和至少3 重量 ％的分子量区域中的树脂组分为至少5×10 6，并且在5000至105的分子量范围内显示出主峰。粘合剂树脂的酸值为2-100mg KOH / g。 在调色剂生产过程中，在熔融捏合步骤期间富含至少5×10 6分子量的THF可溶性树脂组分。

    Electrostatic image developing toner and fixing method
    6.
    发明授权
    Electrostatic image developing toner and fixing method 失效
    静电图像显影调色剂和定影方法

    公开(公告)号：US5298354A

    公开(公告)日：1994-03-29

    申请号：US856298

    申请日：1992-03-23

    申请人： Satoshi Matsunaga ,  Takashige Kasuya ,  Hiroaki Kawakami ,  Kiyoko Tsuchiya ,  Yusuke Karami ,  Shinji Doi

    发明人： Satoshi Matsunaga ,  Takashige Kasuya ,  Hiroaki Kawakami ,  Kiyoko Tsuchiya ,  Yusuke Karami ,  Shinji Doi

    IPC分类号： G03G9/087 ,  G03G13/10

    CPC分类号： G03G9/08795 ,  Y10S430/105

    摘要： A toner for developing an electrostatic image, comprises a binder resin and a colorant. Such binder resin contains a THF-insoluble component in an amount of less than 10 wt. % based on the binder resin, and, in the molecular weight distribution measured by GPC (gel permeation chromatography) of a THF-soluble component, has a weight average molecular weight/number average molecular weight (Mw/Mn) of .gtoreq.18, a molecular weight peak MA in the region of a molecular weight of from 3,000 to 20,000, a molecular weight peak MB in the region of a molecular weight of from 380,000 to 1,000,000, a molecular weight minimum Md in the region of a molecular weight of from 20,000 to 380,000, provided that MB/MA is in the range of from 30 to 150, and a molecular weight distribution curve area ratio SA:SB:Sd of 1:0.3 to 0.8:0.35 to 0.8.

    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。 这种粘合剂树脂含有少于10重量％的THF不溶性组分。 ，基于粘合剂树脂的％，通过THF可溶性组分的GPC（凝胶渗透色谱法）测定的分子量分布具有重均分子量/数均分子量（M（OVS）w / M ）n）≥18，分子量为3,000〜20,000的分子量峰值MA，分子量为380,000〜1,000,000的分子量峰值MB，分子量最小值Md在 分子量为20,000〜380,000的区域，条件是MB / MA在30〜150的范围内，分子量分布曲线面积比SA：SB：Sd为1:0.3〜0.8:0.35〜0.8 。