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    Toner, image forming method, and process cartridge
    2.
    发明公开
    Toner, image forming method, and process cartridge 有权
    Toner，Bilderzeugungsverfahren und Prozesskartusche

    公开(公告)号：EP2648045A1

    公开(公告)日：2013-10-09

    申请号：EP13160433.2

    申请日：2013-03-21

    申请人： Ricoh Company, Ltd.

    发明人： NAGAYAMA, Masashi ,  NAKAJIMA, Hisashi ,  YAMADA, Saori ,  HANATANI, Shinya ,  TAKII, Mariko ,  SEKIGUCHI, Yoshitaka

    IPC分类号： G03G9/087 ,  G03G9/08

    CPC分类号： G03G9/08 ,  G03G9/081 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/08755 ,  G03G9/08786 ,  G03G9/08795 ,  G03G9/08797 ,  G03G13/20 ,  G03G21/18

    摘要： A toner including a crystalline polyester resin (A), an amorphous resin (B), and a composite resin (C) having a condensation polymerization resin unit and an addition polymerization resin unit is provided. A molecular weight distribution of the toner based on THF-soluble contents thereof has a main peak within a molecular weight range from 1,000 to 10,000 and a half bandwidth of the main peak is 15,000 or less. The molecular weight distribution is determined by gel permeation chromatography. The toner includes chloroform-insoluble contents. A ratio C/R of the toner is within a range from 0.03 to 0.55. C and R represent heights of spectrum peaks specific to the crystalline polyester resin (A) and the amorphous resin (B), respectively, determined by a Fourier transform infrared spectroscopic attenuation total reflection method after the toner is stored in a thermostatic chamber at 45°C for 12 hours.

    摘要翻译： 提供了包含结晶聚酯树脂（A），无定形树脂（B）和具有缩聚树脂单元和加成聚合树脂单元的复合树脂（C）的调色剂。 基于THF可溶物含量的调色剂的分子量分布具有在1,000至10,000的分子量范围内的主峰，并且主峰的半带宽为15,000或更小。 分子量分布通过凝胶渗透色谱法测定。 该调色剂包括不溶于氯仿的内容物。 调色剂的比例C / R在0.03〜0.55的范围内。 C和R分别表示在将调色剂储存在45度的恒温室中之后，通过傅里叶变换红外光谱衰减全反射法测定的结晶性聚酯树脂（A）和非晶质树脂（B）特有的光谱峰的高度 C 12小时。

    DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
    7.
    发明公开
    DEVELOPING DEVICE AND IMAGE FORMING APPARATUS 审中-公开
    开发设备和图像形成设备

    公开(公告)号：EP3195063A1

    公开(公告)日：2017-07-26

    申请号：EP15842282.4

    申请日：2015-08-31

    申请人： Ricoh Company, Ltd.

    发明人： IWATSUKI, Hitoshi ,  SAKATA, Koichi ,  TOHMATSU, Hiroshi ,  TANO, Toyoaki ,  MASHIKO, Kenichi ,  TAKII, Mariko ,  KISHIDA, Hiroyuki ,  MURASAWA, Yoshihiro ,  KONDOH, Keinosuke ,  KOIKE, Toshio ,  TAKAHASHI, Yutaka

    IPC分类号： G03G15/09 ,  G03G9/10 ,  G03G9/113 ,  G03G15/06 ,  G03G15/08

    CPC分类号： G03G15/0928 ,  G03G9/1136 ,  G03G9/1139 ,  G03G15/065 ,  G03G15/0907

    摘要： A developing device, including: a developer containing toner and carrier; and developer bearer configured to have surface thereof bear the developer and endlessly move, and to develop latent image over surface of latent image bearer by supplying toner in developer to latent image in developing region facing the latent image bearer, wherein carrier contains fine particles, value X in volume resistivity R (=10X) (Ω·cm) of carrier is 11.5-16.0, developer bearer includes: magnetic field generating unit including a plurality of magnetic poles; and developing sleeve having a cylindrical shape enclosing magnetic field generating unit, and configured to bear developer over outer circumferential surface of cylindrical shape by magnetic force of the magnetic field generating unit and perform surface moving by rotating relative to developing device body, and developing device includes developing sleeve voltage applying unit configured to apply AC component-containing voltage to developing sleeve.

    摘要翻译： 一种显影装置，包括：含有调色剂和载体的显影剂; 以及显影剂承载体，其构造为使其表面承载显影剂并且无限移动，并且通过将显影剂中的调色剂供给到面向潜像承载体的显影区域中的潜像而在潜像承载体的表面上显影潜像，其中载体包含微粒， 载体的体积电阻率R（= 10X）（Ω·cm）中的X为11.5-16.0，显影剂载体包括：包括多个磁极的磁场产生单元; 以及显影套筒，其具有包围磁场产生单元的圆筒形状，并且被配置为通过所述磁场产生单元的磁力将显影剂承载在圆筒形状的外周面上，并且通过相对于显影装置本体旋转来执行表面移动，并且显影装置包括 显影套筒电压施加单元，其被配置为向显影套筒施加包含AC分量的电压。