公开(公告)号：EP0431737B1

公开(公告)日：1997-01-02

申请号：EP90311329.8

申请日：1990-10-16

Applicant: MITA INDUSTRIAL CO., LTD.

Inventor： Itakura, Takayuki ,  Teshima, Takashi ,  Iida, Tomohide ,  Horio, Hirofumi

IPC: G03G9/097

CPC classification number: G03G9/09716

公开(公告)号：EP0704767A1

公开(公告)日：1996-04-03

申请号：EP95305606.6

申请日：1995-08-11

Applicant: MITA INDUSTRIAL CO., LTD.

Inventor： Funato, Masatomi, c/o Mita Industrial Co., Ltd. ,  Ishimaru, Seijiro, c/o Mita Industrial Co., Ltd. ,  Shimizu, Yoshitake, c/o Mita Industrial Co., Ltd. ,  Kubo, Norio, c/o Mita Industrial Co., Ltd. ,  Nagao, Kazuya ,  Kato, Mamoru ,  Asano, Terumichi ,  Iida, Tomohide ,  Kawata, Hideaki ,  Kawano, Nobuaki ,  Hatase, Yoshiteru ,  Tamura, Hidekazu ,  Fujii, Kazuhiko

IPC: G03G9/087 ,  G03G9/083 ,  G03G9/107 ,  G03G9/113

CPC classification number: G03G9/1136 ,  G03G9/083 ,  G03G9/08791 ,  G03G9/107 ,  G03G9/1133 ,  G03G9/1135 ,  G03G9/1137

Abstract: The invention provides a two-component type developer including toner and a carrier. The toner particles in the toner includes a binder resin and magnetic powder dispersed in the binder resin. The binder resin is made of a composition including a resin having an anionic group. The magnetic powder is included in the toner particles at a proportion of 0.1 through 5 parts by weight per 100 parts by weight of the binder resin. Each of the carrier particles in the carrier has a core particle and a coating layer covering the core particle, and the core particle is made of a magnetic material represented by the following Formula (A):

        Formula (A)   MOFe₂O₃


wherein M indicates at least one metal selected from the group consisting of Cu, Zn, Fe, Ba, Ni, Mg, Mn, Al and Co.

Abstract translation: 本发明提供一种包括调色剂和载体的双组分型显影剂。 调色剂中的调色剂颗粒包括粘合剂树脂和分散在粘合剂树脂中的磁性粉末。 粘合剂树脂由包含具有阴离子基团的树脂的组合物制成。 相对于100重量份的粘合剂树脂，磁粉以0.1至5重量份的比例包含在调色剂颗粒中。 载体中的载体颗粒中的每一个具有芯颗粒和覆盖芯颗粒的涂层，芯颗粒由以下式（A）表示的磁性材料制成：式（A）MOFe 2 O 3其中M表示至少 选自由Cu，Zn，Fe，Ba，Ni，Mg，Mn，Al和Co组成的组中的一种金属

公开(公告)号：EP1014206A1

公开(公告)日：2000-06-28

申请号：EP99310370.4

申请日：1999-12-21

Applicant: MITA INDUSTRIAL CO. LTD.

Inventor： Sumiyoshi, Tadao ,  Iida, Tomohide

IPC: G03G9/113

CPC classification number: G03G9/1136 ,  G03G9/10 ,  G03G9/1075

Abstract: A two-component-type developing agent comprising a silicone resin-coated carrier and a positively charging toner, the silicone coated carrier having an average particle diameter of from 60 to 110 µm, the silicone resin coating having an average thickness of from 0.1 to 0.3 µm, the carrier having a resistivity of from 1.5 x 10 8 to 1.5 x 10 11 Ω·cm, the toner concentration being from 3.0 to 5.0 % by weight and the amount of electric charge by friction of the toner based on the suction method being from +10 to +20 µc/g. The silicone resin-coated carrier and the developing agent feature long life without permitting the spent toner to adhere on the carrier surfaces, without permitting the carrier coating to peel off even after repetitively used for extended periods of time, featuring stable amount of electric charge by friction, stable developing properties, and maintaining favorable image quality for extended periods of time developing none of carrier dragging, toner scattering in the machine, background fogging or defective image density.

Abstract translation: 含有有机硅树脂涂覆的载体和正带电性的调色剂的双组分型显影剂，其具有上的60至110微米平均粒径的有机硅涂覆的载体中，具有从0.1至的平均厚度的有机硅树脂涂层 0.3微米，具有的电阻率的载体从1.5×10 <8>至1.5×10 <11> OMEGA·cm的范围，调色剂浓度由调色剂的摩擦是从3.0％至5.0％（重量），电荷的量 基于吸入方法是从10到20微米C / G。 有机硅树脂涂覆的载体和显影剂设有长寿命，而不允许所述废调色剂附着在载体表面上，而不允许所述载体涂层剥落即使反复用于延长的时间段，由设有电荷的稳定量 摩擦，稳定的显影性能，并维护用于开发无载体拖动，调色剂飞散的在机器中，背景雾化或有缺陷的图像密度长时间良好的图像质量。

公开(公告)号：EP0431737A1

公开(公告)日：1991-06-12

申请号：EP90311329.8

申请日：1990-10-16

Applicant: MITA INDUSTRIAL CO., LTD.

Inventor： Itakura, Takayuki ,  Teshima, Takashi ,  Iida, Tomohide ,  Horio, Hirofumi

IPC: G03G9/097

CPC classification number: G03G9/09716

Abstract: A toner composition for the development of an electrostatic latent image comprises a toner and a hydrophobic silica composed of a fine powder of silica treated with a compound having a polymethylsilyl group in the molecule.

Abstract translation: 用于显影静电潜像的调色剂组合物包括调色剂和由在分子中用具有聚甲基甲硅烷基的化合物处理的二氧化硅的细粉末组成的疏水性二氧化硅。