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1. 发明授权

US06534229B2 Developer for electrostatic image development 有权
标题翻译：静电图像开发的开发者
公开(公告)号：US06534229B2
公开(公告)日：2003-03-18
申请号：US09780337
申请日：2001-02-12
申请人： Katsunori Ohba , Katsuyuki Ogura , Masanobu Nakamura , Toshiro Kogawara , Hideki Gambayashi
发明人： Katsunori Ohba , Katsuyuki Ogura , Masanobu Nakamura , Toshiro Kogawara , Hideki Gambayashi
IPC分类号： G03G9087
CPC分类号： G03G9/0819 , G03G9/0823 , G03G9/08755 , G03G9/08797
摘要： An object of the present invention is to provide a developer for electrostatic image development, which exhibits stable charge behavior during printing even when using a polyester resin and does not cause contamination of the inside of the apparatus because of less scattering of the toner, and also facilitates easy maintenance. The developer for electrostatic image development of the present invention comprises colored resin particles comprising at least a binder resin and a colorant, and a magnetic carrier, wherein a proportion of said colored resin particles having a particle diameter in a range of from 12 &mgr;m to 16 &mgr;m, inclusive, in said developer and a specific charge amount of said colored resin particles meet the following expression (1): 5.18+0.12×A
摘要翻译：本发明的目的是提供一种用于静电图像显影的显影剂，其即使在使用聚酯树脂时也在印刷过程中表现出稳定的电荷行为，并且由于调色剂的散射较少而不会使设备的内部受到污染，并且还便于维护。本发明的静电显影显影剂包括至少包含粘合剂树脂和着色剂的着色树脂颗粒和磁性载体，其中一部分所述着色树脂颗粒的粒径在12μm至16μm的范围内包括在内的所述显影剂，并且所述着色树脂颗粒的特定电荷量满足以下表达式（1）:(其中A表示粒径在12范围内的着色树脂颗粒的比例（体积％）〜16μm，B表示粒径在12μm〜16μm的范围内的着色树脂粒子的比电荷量Q / M（μC/ g）。

2. 发明授权

US06455218B2 Developer for electrostatic image development and image forming method using the same 有权
标题翻译：用于静电图像显影的显影剂和使用其的图像形成方法
公开(公告)号：US06455218B2
公开(公告)日：2002-09-24
申请号：US09875176
申请日：2001-06-07
申请人： Takeshi Isonaka , Toshiro Kogawara , Katsunori Ohba , Shinji Amaya
发明人： Takeshi Isonaka , Toshiro Kogawara , Katsunori Ohba , Shinji Amaya
IPC分类号： G03G9113
CPC分类号： G03G9/09733 , G03G9/0906 , G03G9/09741 , G03G9/0975 , G03G9/10 , G03G9/1075 , G03G9/1131 , G03G9/1132 , G03G9/1139
摘要： The present invention relates to a developer for electrostatic image development comprising: a toner for electrostatic image development which comprises a resin and a colorant; and a carrier formed by a carrier core material and a resin layer including a resistance control agent which is formed on the surface of the carrier core material, wherein the resin layer of the carrier has a concentration gradient of the resistance control agent toward the thickness direction of the resin layer, a concentration of the resistance control agent is the highest in the vicinity of the carrier core material, and is gradually lowered toward the surface of the resin layer, and the resistance control agent is present on the surface of the resin layer, as well as relates to an image forming method, wherein it comprises a step of developing an electrostatic image at a developing speed of 20 m/min or higher, by means of employing the developer for electrostatic image development. The developer for electrostatic image development of the invention exhibits a stable development and transfer behavior without any variation of triboelectric charging performance, electric resistance, or the like, even when used as a two-component developer, and in addition, affords a printed image with high image quality and high grade without any fogging.
摘要翻译：本发明涉及一种用于静电图像显影的显影剂，包括：用于静电图像显影的调色剂，其包含树脂和着色剂; 以及由载体芯材形成的载体和形成在载体芯材的表面上的电阻控制剂的树脂层，其中载体的树脂层具有电阻控制剂朝向厚度方向的浓度梯度，电阻控制剂的浓度在载体芯材附近最高，并且朝向树脂层的表面逐渐降低，并且电阻控制剂存在于树脂层的表面上以及涉及一种图像形成方法，其中包括通过使用用于静电图像显影的显影剂来以20m / min或更高的显影速度显影静电图像的步骤。本发明的静电显影显影剂即使用作双组分显影剂也表现出稳定的显影和转印行为，而不会出现摩擦带电性能，电阻等的任何变化，并且还提供具有高图像质量和高档无任何雾化。

3. 发明授权

US06653040B2 Electrophotographic carrier, developer using the same, and developing method 有权
标题翻译：电子照相载体，使用相同的显影剂和显影方法
公开(公告)号：US06653040B2
公开(公告)日：2003-11-25
申请号：US09981786
申请日：2001-10-19
申请人： Katsunori Ohba , Toshiro Kogawara , Takeshi Isonaka , Shinji Amaya
发明人： Katsunori Ohba , Toshiro Kogawara , Takeshi Isonaka , Shinji Amaya
IPC分类号： G03G9113
CPC分类号： G03G9/10 , G03G9/1131 , G03G9/1136 , G03G9/1139
摘要： The present invention provides a carrier for electrophotography, which is capable of charging the toner in the developer very rapidly to a target electrostatic charge and at the same time, is capable of maintaining the target electrostatic charge during printing, so that the chemical fogging related to the slow charging rate can be eliminated and the image density related to the maintenance of the electrostatic charge can be preserved during printing. The charging rate and the charge maintenance of the electrophotographic carrier can be preserved if the carrier composed of magnetic core particles and the resin coat satisfies the following equation (B)>[(−19.4)×(A)+31], wherein (A) represents a carbon content (weight %) of the carrier and (B) represents a ratio of the square root of the number of emitted photoelectrons ((CPS)½) and the photon energy (eV).
摘要翻译：本发明提供了一种用于电子照相的载体，其能够将显影剂中的调色剂非常快速地充电到目标静电电荷，并且同时能够在印刷期间保持目标静电电荷，使得与可以消除缓慢的充电速率，并且在打印期间可以保持与维持静电电荷相关的图像浓度。如果由磁芯颗粒和树脂涂层构成的载体满足下列等式（B）> [（ - 19.4）x（A）+31]，则可以保持电子照相载体的充电速率和电荷维持性，其中（A ）表示载体的碳含量（重量％），（B）表示发射光电子数（（CPS）1/2）的平方根与光子能量（eV）的比率。

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