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公开(公告)号：US5202730A
公开(公告)日：1993-04-13
申请号：US723212
申请日：1991-06-28
申请人： Kazuo Fuji , Akira Nakakuma , Noriaki Tsubota , Masahiko Kubo , Kazuhisa Edahiro
发明人： Kazuo Fuji , Akira Nakakuma , Noriaki Tsubota , Masahiko Kubo , Kazuhisa Edahiro
摘要： Disclosed is a developing process using a two-component type magnetic developer, where the main pole of developing magnetic poles in the developing sleeve is arranged upstream of the position, where a photosensitive drum becomes closest to the developing sleeve, in the rotation direction of the developing sleeve, this closest position between the drum and the developing sleeve is included in a region where the flux density in the magnetic force distribution of the main pole decreases toward the downstream side in the rotation direction of the sleeve, an alternating current voltage is applied between the developing sleeve and the drum to form an alternating electric field between the highest voltage and lowest voltage of the electrostatic latent image and in this state the development is carried out. According to this process, the conditions required for the supply of the developer are considerably moderated and an image having a high quality can be advantageously obtained.
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公开(公告)号：US5212033A
公开(公告)日：1993-05-18
申请号：US798742
申请日：1991-11-27
CPC分类号： G03G9/09741 , G03G9/08726 , G03G9/08791
摘要： The electrophotographic toner for negative charging according to the present invention is characterized in that an acrylamide copolymer-containing sulfonic acid group is used as a charge-controlling agent for negative charging and a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with the charge-controlling agent. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.
摘要翻译： 根据本发明的用于负带电的电子照相调色剂的特征在于，使用含丙烯酰胺共聚物的磺酸基作为负电荷的电荷控制剂，并且使用具有含氧酸阴离子的季铵盐作为电荷控制 助剂与电荷控制剂组合使用。 用作助剂的季铵盐与固定树脂不相容，但可分散在其中。 因此，本发明的调色剂提供了电荷量的急剧分布，并且可以有效地防止形成对显影无贡献的高度充电的调色剂或导致调色剂飞散的低电荷调色剂。
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公开(公告)号：US5209999A
公开(公告)日：1993-05-11
申请号：US798746
申请日：1991-11-27
IPC分类号： G03G9/097
CPC分类号： G03G9/09741 , G03G9/097 , G03G9/09783
摘要： The electrophotographic toner for negative charging according to the present invention is characterized in that a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with a charge-controlling agent for negative charging. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.
摘要翻译： 根据本发明的用于负电荷的电子照相调色剂的特征在于，具有含氧酸阴离子的季铵盐用作负电荷控制剂的电荷控制助剂。 用作助剂的季铵盐与固定树脂不相容，但可分散在其中。 因此，本发明的调色剂提供了电荷量的急剧分布，并且可以有效地防止形成对显影无贡献的高度充电的调色剂或导致调色剂飞散的低电荷调色剂。
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公开(公告)号：US5296328A
公开(公告)日：1994-03-22
申请号：US738554
申请日：1991-07-31
申请人： Kazuo Fuji , Akira Nakakuma , Naruo Yabe , Akihiro Watanabe , Yoshihisa Kuramae , Toshio Nishio , Noriaki Tsubota , Masahiko Kubo , Kazuhisa Edahiro
发明人： Kazuo Fuji , Akira Nakakuma , Naruo Yabe , Akihiro Watanabe , Yoshihisa Kuramae , Toshio Nishio , Noriaki Tsubota , Masahiko Kubo , Kazuhisa Edahiro
摘要： The present invention provides a magnetic brush developing method using a two-component developer, characterized in that the development is carried out under such conditions that at the position where the sliding contact of the magnetic brush with the surface of the photosensitive material drum terminates, the following requirement is satisfied:P.sub.x .gtoreq.430, orP.sub.x
摘要翻译： 本发明提供一种使用双组分显影剂的磁刷显影方法，其特征在于，在磁刷与感光鼓的表面的滑动接触终止的位置， 满足以下要求：Px> = 430或Px <430且Py> = -Px + 800，其中Px表示在显影套筒表面上沿切线方向作用的磁力（Gauss），Py表示磁 力（高斯）在显影套筒的表面上沿法线方向作用。
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公开(公告)号：US5225300A
公开(公告)日：1993-07-06
申请号：US798745
申请日：1991-11-27
IPC分类号： G03G9/097
CPC分类号： G03G9/09783 , G03G9/09741
摘要： The electrophotographic toner for negative charging according to the present invention is characterized in that a metal compound of an aromatic hydroxycarboxylic acid is used as a charge-controlling agent for negative charging and a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with the charge-controlling agent. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.
摘要翻译： 根据本发明的用于负电荷的电子照相调色剂的特征在于，使用芳族羟基羧酸的金属化合物作为负电荷的电荷控制剂，并且使用具有含氧酸阴离子的季铵盐作为电荷控制 助剂与电荷控制剂组合使用。 用作助剂的季铵盐与固定树脂不相容，但可分散在其中。 因此，本发明的调色剂提供了电荷量的急剧分布，并且可以有效地防止形成对显影无贡献的高度充电的调色剂或导致调色剂飞散的低电荷调色剂。
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公开(公告)号：US4849318A
公开(公告)日：1989-07-18
申请号：US114593
申请日：1987-10-30
申请人： Noriaki Tsubota , Toshiro Tokuno
发明人： Noriaki Tsubota , Toshiro Tokuno
CPC分类号： G03G9/08702 , C08F2/44 , G03G9/0806 , Y10S524/904 , Y10S525/934 , Y10S526/934
摘要： A process for producing an electrophotographic toner in one step by suspension polymerization of monomers capable of forming a fixing resin. In a first embodiment, the suspension polymerization is carried out in the presence of a specific suspension stabilizer and a radical polymerization initiator. In a second embodiment, the suspension polymerization is carried out while applying ultrasonic radiation of a fixed frequency. The process gives a toner having a uniform particle size distribution.
摘要翻译： 通过使能够形成固定树脂的单体的悬浮聚合在一个步骤中制造电子照相调色剂的方法。 在第一实施方案中，悬浮聚合在特定悬浮稳定剂和自由基聚合引发剂的存在下进行。 在第二实施方式中，在施加固定频率的超声波的同时进行悬浮聚合。 该方法得到具有均匀粒度分布的调色剂。
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公开(公告)号：US5300383A
公开(公告)日：1994-04-05
申请号：US095697
申请日：1993-07-22
申请人： Noriaki Tsubota , Masahiko Kubo , Kazuo Fuji , Kazuhisa Edahiro
发明人： Noriaki Tsubota , Masahiko Kubo , Kazuo Fuji , Kazuhisa Edahiro
CPC分类号： G03G9/0926 , G03G9/09
摘要： Disclosed is a toner having an excellent transparency for full color development, which comprises a binder resin and a magenta coloring dispersed therein wherein (i) said magenta coloring agent is a quinacridone pigment, (ii) said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 40 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 20, and (iii) the binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm). The critical quantities of these dispersed particles having the above sizes differ among magenta, cyan and yellow toners. Each of these color toners has an excellent light-transmitting property, and therefore, these toners can be valuably used for the full color development where these toners are developed in the overlapped state on a transfer material to form a full color image.
摘要翻译： 公开了一种具有优异的全色显影透明度的调色剂，其包含分散在其中的粘合剂树脂和品红色，其中（i）所述品红色着色剂是喹吖啶酮颜料，（ii）所述颜料分散在粘合剂树脂中 形式的细颗粒，并且当调色剂形成厚度为0.9（my）m的层时，分散颜料占形成表面面积的78万（m 2）m 2的面积为 尺寸为10至12.5（my）m2的分散颜料颗粒小于40，尺寸为12.5至15.0（my）m2的分散颜料颗粒数小于20，（iii）粘合剂树脂具有 电导率为1.0×10 -9〜5.0×10 -9（s / cm）。 具有上述尺寸的这些分散颗粒的临界量在品红色，青色和黄色调色剂之间不同。 这些彩色调色剂中的每一种具有优异的透光性，因此，这些调色剂可以用于全色显影，其中这些调色剂在重叠状态下在转印材料上显影以形成全色图像。
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公开(公告)号：US5215850A
公开(公告)日：1993-06-01
申请号：US801503
申请日：1991-11-27
CPC分类号： G03G9/097 , G03G9/08755 , G03G9/091 , G03G9/09741
摘要： The electrophotographic toner for negative charging according to the present invention is characterized in that a polyester resin is used as a fixing resin and a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with a charge-controlling agent for negative charging. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.
摘要翻译： 根据本发明的负电荷用电子照相调色剂的特征在于，使用聚酯树脂作为固定树脂，并且使用具有含氧酸阴离子的季铵盐作为电荷控制助剂与电荷控制剂 负电荷。 用作助剂的季铵盐与固定树脂不相容，但可分散在其中。 因此，本发明的调色剂提供了电荷量的急剧分布，并且可以有效地防止形成对显影无贡献的高度充电的调色剂或导致调色剂飞散的低电荷调色剂。
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公开(公告)号：US5212038A
公开(公告)日：1993-05-18
申请号：US565142
申请日：1990-08-10
IPC分类号： G03G9/08
CPC分类号： G03G9/0823
摘要： Disclosed are a two-component type developer for use in the electrophotography or electrostatic printing, which comprises a magnetic carrier and a toner, and a process for the preparation thereof. This developer has a dynamic resistivity (Rd) lower than the dynamic resistivity (Rc) of the magnetic carrier. This developer is prepared by mixing a toner with a magnetic carrier so that the dynamic resistivity (Rd) of the formed developer is lower than the dynamic resistivity (Rc) of the magnetic carrier. This developer is capable of realizing an excellent reproducibility of a fine line image and a high density of a solid image area simultaneously.
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