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    MAGNETIC CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS, PROCESS FOR PRODUCTION THEREOF, AND TWO-COMPONENT DEVELOPERS
    1.
    发明授权
    MAGNETIC CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS, PROCESS FOR PRODUCTION THEREOF, AND TWO-COMPONENT DEVELOPERS 有权
    磁体支撑，电力照相显影剂，工艺用于生产和两个组件开发者

    公开(公告)号：EP2439593B1

    公开(公告)日：2016-08-24

    申请号：EP10783459.0

    申请日：2010-06-04

    申请人： Toda Kogyo Corporation

    发明人： IWAMI,Katsuji ,  HARADA,Shigenori ,  KURITA,Eiichi ,  KINOSHITA,Kaori

    IPC分类号： G03G9/107 ,  G03G9/113

    CPC分类号： G03G9/1075 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/0918 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1136

    摘要： The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical magnetic composite particles comprising a phenol resin as a binder and ferromagnetic iron oxide particles bonded to each other through the phenol resin, wherein the spherical magnetic composite particles have a ten-point mean roughness Rz of 0.3 to 2.0 µm. The magnetic carrier for an electrophotographic developer according to the present invention exhibits an excellent durability against peeling-off and abrasion of coating resins formed thereon and a high stability to mechanical stress exerted onto the carrier, is free from occurrence of spent toner, can be stably held over a long period of time without occurrence of fogging and unevenness in density of toner images, and can keep high-quality images with an excellent gradation for a long period of time.

    摘要翻译： 本发明涉及一种用于在电子照相显影剂包含含有酚树脂作为粘合剂，并通过苯酚树脂彼此结合强磁性氧化铁颗粒的球形磁性复合体颗粒，worin球状磁性复合颗粒的磁性载体具有十点平均 的0.3〜2.0微米的粗糙度Rz。 在电子照相显影剂雅丁到本发明表现出抗剥离和在其上形成的涂层树脂的磨损和较高的稳定性，以机械应力的耐久性优异的磁性载体施加到载体上，是从废调色剂的发生游离，能够稳定地 举行了的时间，而不在调色剂图像的密度灰雾和不均匀性的发生期长，并能保持高品质的图像与时间的长期优异的灰度。

    MAGNETIC CARRIERS FOR ELECTROPHOTOGRAPHIC DEVELOPER, PROCESSES FOR PRODUCING SAME, AND TWO-COMPONENT DEVELOPER
    2.
    发明公开
    MAGNETIC CARRIERS FOR ELECTROPHOTOGRAPHIC DEVELOPER, PROCESSES FOR PRODUCING SAME, AND TWO-COMPONENT DEVELOPER 审中-公开
    ，电力照相显影剂，工艺磁性支撑其制造和两个组件开发者

    公开(公告)号：EP2857903A1

    公开(公告)日：2015-04-08

    申请号：EP13796970.5

    申请日：2013-05-30

    申请人： Toda Kogyo Corporation

    发明人： KINOSHITA, Kaori ,  KURITA, Eiichi

    IPC分类号： G03G9/107 ,  G03G9/113

    CPC分类号： G03G9/1135 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1136

    摘要： The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin, and having an average particle diameter of 20 to 60 µ m, the magnetic carrier for an electrophotographic developer satisfying the formula (1): σ 1 - σ 0 = -2 to 0 wherein σ 0 represents a saturation magnetization (Am 2 /kg) of the carrier particles having a particle diameter in the vicinity of the average particle diameter of the magnetic carrier for an electrophotographic developer; and σ 1 represents a saturation magnetization (Am 2 /kg) of the carrier particles having a particle diameter of less than 20 µ m, and a two-component system developer using the magnetic carrier. The two-component system developer of the present invention includes a magnetic carrier used for an electrophotographic developer which can exhibit a good durability, is free from occurrence of carrier adhesion, and can maintain a high quality of images produced for a long period of time, and comprises the magnetic carrier for an electrophotographic developer and a toner.

    摘要翻译： 本发明涉及一种磁性载体，在电子照相显影剂包括含有至少强磁性氧化铁微粒和固化的酚醛树脂的球状复合芯颗粒，并具有上，在20的平均粒径为60μ米，用于电照相的磁性载体 显影剂满足式（1）：方案1 - 具有磁性的平均粒径附近粒径的载体颗粒的0 = -2〜0的worin A 0 darstellt的饱和磁化强度（AM 2 / kg）的 载体在电子照相显影剂; 和A 1 darstellt的饱和磁化强度具有小于20μ米的粒径，以及使用该磁性载体的双组分类显影剂的载体颗粒（AM 2 /千克）。 本发明的双组分体系显影剂包括用于在电子照相显影剂从而可以表现出良好的耐久性的磁性载体，是从载体粘附的发生游离，并能维持一段长周期产生的图像的高质量， 并且包括用于在电子照相显影剂和调色剂的磁性载体。

    MAGNETIC CARRIER FOR ELECTROPHOTOGRAPH-DEVELOPING AGENT, PROCESS FOR PRODUCTION THEREOF, AND TWO-COMPONENT DEVELOPING AGENT
    4.
    发明公开
    MAGNETIC CARRIER FOR ELECTROPHOTOGRAPH-DEVELOPING AGENT, PROCESS FOR PRODUCTION THEREOF, AND TWO-COMPONENT DEVELOPING AGENT 有权
    磁体支撑，电力照相显影基金，工艺用于双组分制备和开发手段

    公开(公告)号：EP2444847A1

    公开(公告)日：2012-04-25

    申请号：EP10789494.1

    申请日：2010-06-15

    申请人： Toda Kogyo Corporation

    发明人： KINOSHITA, Kaori ,  UEMOTO, Shinji ,  KURITA, Eiichi

    IPC分类号： G03G9/107 ,  G03G9/113

    CPC分类号： G03G9/1131 ,  G03G9/107 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1137

    摘要： The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite particles comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin and having an average particle diameter of 1 to 100 µm, and a melamine resin coating layer formed on the respective core particles, wherein a ratio of R 100 to R 300 (R 100 /R 300 ) in which R 100 is an electric resistance value as measured when applying a voltage of 100 V to the magnetic carrier; and R 300 is an electric resistance value as measured when applying a voltage of 300 V to the magnetic carrier, is controlled to lie within the range of 1 to 50. The magnetic carrier according to the present invention is capable of maintaining an adequate electric resistance value upon development, providing images having an excellent image quality, exhibiting a good durability, obtaining a good reproducibility of uniform solid image portions having a high image density, and keeping high quality images having an excellent gradation for a long period of time.

    摘要翻译： 本发明涉及一种磁性载体，在电子照相显影剂，包含球状复合粒子包括含有至少强磁性氧化铁微粒和固化的酚醛树脂和具有在1至100微米的平均粒径的球状复合体芯颗粒，和三聚氰胺树脂 涂布层形成在respectivement芯颗粒，worin - [R 100的比率至R 300（R 100 / R 300），其中R 100是作为测量时施加100V至磁性载体的电压的电阻值; 并且R 300是电阻值作为测量时施加300V的电压施加到磁性载体，被控制成位于1的范围内，以50的磁性载体雅丁到本发明能够适当电阻的维护的 在显影时值，具有优异的图像质量提供图像，显示良好的耐久性，获得具有高图像密度均匀的实心图像部分的再现性良好，并且保持具有用于长时间层次性优异的高品质图像。

    CARRIER, DEVELOPER, IMAGE FORMING METHOD AND PROCESS CARTRIDGE
    5.
    发明公开
    CARRIER, DEVELOPER, IMAGE FORMING METHOD AND PROCESS CARTRIDGE 有权
    CARRIER，开发人员，图像生成法和处理盒

    公开(公告)号：EP1991913A1

    公开(公告)日：2008-11-19

    申请号：EP07715310.4

    申请日：2007-03-06

    申请人： Ricoh Company, Ltd.

    发明人： NAGAYAMA, Masashi ,  YAMAGUCHI, Kimitoshi ,  IMAHASHI, Naoki

    IPC分类号： G03G9/113 ,  G03G9/107

    CPC分类号： G03G9/0819 ,  G03G9/0821 ,  G03G9/0823 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1135 ,  G03G9/1136 ,  G03G9/1137 ,  G03G9/1139 ,  G03G15/20

    摘要： The present invention is to provide a carrier and a developer, which have fewer occurrences of carrier adhesion and background smear, excellent granularity and longer durability. The carrier comprises the core material particles having magnetism and resin coating layer covering the core material particles, and wherein the weight average particle diameters is in the range of 22m to 32m, the proportion of the weight average particle diameters relative to the number average particle diameter is in the range of 1.00 to 1.20, the content of particles having a diameter of 20m or smaller is 7% by mass, the content of carrier particles having a diameter of 36m or smaller is in the range of 90% by mass to 100% by mass, and the proportion of the particle density of the core material particles is in the range of 85% to 100% of the true density of the core material particles.