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    Image forming method including recycling of untransferred toner collected from image bearing member to developing means
    2.
    发明授权
    Image forming method including recycling of untransferred toner collected from image bearing member to developing means 失效
    图像形成方法，包括将从图像承载部件收集的未转印的调色剂再循环到显影装置

    公开(公告)号：US5849453A

    公开(公告)日：1998-12-15

    申请号：US72950

    申请日：1993-06-08

    申请人： Yushi Mikuriya ,  Masaki Uchiyama ,  Yasutaka Akashi

    发明人： Yushi Mikuriya ,  Masaki Uchiyama ,  Yasutaka Akashi

    IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G13/09 ,  G03G15/08 ,  G03G21/00 ,  G03G21/10

    CPC分类号： G03G13/09 ,  G03G9/0819

    摘要： An image forming method has the steps of forming a toner image by developing through a developing means a latent image formed on a latent image bearing member; transferring the toner image formed, from the latent image bearing member to a transfer medium through a transfer means to which a bias is applied; cleaning the latent image bearing member from which the toner image has been transferred to the transfer medium, to recover and collect the toner remaining on the latent image bearing member; and feeding the toner recovered and collected, to the developing means for reuse in the developing step. The toner has a binder resin and at least one of a magnetic powder and a colorant. The toner has a weight average particle diameter (D.sub.4) of from 4 .mu.m to 11 .mu.m; a coefficient A of variation of number-base distribution, of not more than 40, which is a coefficient represented by the formula: A=S.sub.n /D.sub.1 .times.100 wherein S.sub.n represents a standard deviation of number-base distribution, and D.sub.1 represents a length average particle diameter (.mu.m) on the basis of number; and a coefficient B of variation of volume-base distribution, of not more than 30, which is a coefficient represented by the formula: B=S.sub.W /D.sub.4 .times.100 wherein S.sub.W represents a standard deviation of volume-base distribution, and D.sub.4 represents a weight average particle diameter (.mu.m) on the basis of weight.

    摘要翻译： 图像形成方法具有以下步骤：通过显影装置显影形成在潜像承载部件上形成的潜像来形成调色剂图像; 通过施加偏压的转印装置将形成的调色剂图像从潜像承载部件转印到转印介质上; 清洁调色剂图像已经转印到转印介质上的潜像承载部件，以回收和收集残留在潜像承载部件上的调色剂; 并将回收和收集的调色剂进料到显影装置中以便在显影步骤中重复使用。 调色剂具有粘合剂树脂和磁性粉末和着色剂中的至少一种。 调色剂的重均粒径（D4）为4〜11μm; 数字分布的变化系数A为40以下，其为由下式表示的系数：A = Sn / D1×100，Sn表示数碱基分布的标准偏差，D1表示长度平均粒径 （亩）; 和体积基础分布的变化系数B为30以下，其为由公式B = SW / D4×100表示​​的系数，SW表示体积基础分布的标准偏差，D4表示重均粒子 基于重量的直径（μm）。

    Magnetic toner having defined particle distribution
    4.
    发明授权
    Magnetic toner having defined particle distribution 失效
    具有确定颗粒分布的磁性调色剂

    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。

    Toner for developing electrostatic image
    6.
    发明授权
    Toner for developing electrostatic image 失效
    用于显影静电图像的调色剂

    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。

    Toner for developing electrostatic images, image forming method and image forming apparatus
    7.
    发明授权
    Toner for developing electrostatic images, image forming method and image forming apparatus 失效
    用于静电图像显影的调色剂，成像方法和图像形成装置

    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。

    Monocomponent-type developer for developing electrostatic image and image forming method
    9.
    发明授权
    Monocomponent-type developer for developing electrostatic image and image forming method 失效
    用于显影静电图像和图像形成方法的单组分型显影剂

    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。

    Image forming method with improved development
    10.
    发明授权
    Image forming method with improved development 失效
    具有改进发展的图像形成方法

    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。