公开(公告)号：US07070899B2

公开(公告)日：2006-07-04

申请号：US10606776

申请日：2003-06-27

Applicant: Kazuhiko Yanagida ,  Nobumasa Furuya ,  Takashi Yukutake

Inventor： Kazuhiko Yanagida ,  Nobumasa Furuya ,  Takashi Yukutake

IPC: G03G9/08

CPC classification number: G03G9/1138 ,  G03G9/0819 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1139 ,  G03G15/0928

Abstract: An electrophotographic developer is provided for realizing high-quality images and superior reproducibility of laser dots in a low coverage region and reduced unevenness of color in halftone solid images. The electrophotographic developer includes a toner and a carrier. The toner has a shape factor of 140 or less and a volume average particle size distribution GSDv of 1.3 or less. The carrier has a coat resin layer on a core material, the coat resin layer containing a conductive powder. The core material has a dynamic electric resistivity of 1 Ω·cm or less under an electric field of 104 V/cm in a form of a magnetic brush. The conductive powder has an electric resistivity of 101 Ω·cm or greater and 106 Ω·cm or less. The carrier has an electric resistivity in a range between 10 and 1×108 Ω·cm. An image forming method is also provided wherein the electrophotographic developer is used for development in a developing stage.

Abstract translation: 提供一种电子照相显影剂，用于在低覆盖区域实现高质量图像和优异的激光点再现性，并减少了半色调实心图像中颜色的不均匀性。 电子照相显影剂包括调色剂和载体。 调色剂的形状因子为140以下，体积平均粒径分布GSDv为1.3以下。 载体在芯材上具有涂层树脂层，涂层树脂层含有导电粉末。 在磁刷形式的10V / cm的电场下，芯材料具有1Ω·cm以下的动态电阻率。 导电粉末的电阻率为10±1cm以上且10〜6Ω·cm以下。 载体的电阻率在10和1×10 8Ωcm之间的范围内。 还提供了一种图像形成方法，其中电子照相显影剂用于显影阶段的显影。

公开(公告)号：US07033719B2

公开(公告)日：2006-04-25

申请号：US10627801

申请日：2003-07-28

Applicant: Manabu Serizawa ,  Kazuhiko Yanagida ,  Hidekazu Yaguchi ,  Takahisa Fujii ,  Emi Takahashi ,  Yasuo Matsumura

Inventor： Manabu Serizawa ,  Kazuhiko Yanagida ,  Hidekazu Yaguchi ,  Takahisa Fujii ,  Emi Takahashi ,  Yasuo Matsumura

IPC: G03G9/087

CPC classification number: G03G9/08793 ,  G03G9/08702 ,  G03G9/08711 ,  G03G9/08795 ,  G03G9/09775

Abstract: The present invention provides a toner, comprising a binder resin and a colorant, and having a plurality of absorption peaks in a wave number range of 400 to 4,000 cm−1 in an infrared absorption spectrum, wherein among the plurality of absorption peaks, a maximum absorption peak appears at wave number ranging from 500 to 800 cm−1 and, given that the intensity of the maximum absorption peak is P1 and that the intensity of a second greatest absorption peak is P2, P1 and P2 satisfy the following equation (1), a developer comprising this toner, an image forming method using this toner, and an image forming apparatus using this toner. 1.6≦P1/P2≦6.0   Equation (1)

Abstract translation: 本发明提供了一种调色剂，其包含粘合剂树脂和着色剂，并且在红外吸收光谱中具有多个在400至4000cm -1的波数范围内的吸收峰，其中 多个吸收峰，最大吸收峰出现在范围为500至800cm -1的波数，并且假定最大吸收峰的强度为P1，并且第二最大吸收强度 峰值为P2，P1和P2满足以下等式（1），包含该调色剂的显影剂，使用该调色剂的图像形成方法和使用该调色剂的图像形成装置。 <？in-line-formula description =“In-line Formulas”end =“lead”？> 1.6 <= P 1 / P 2 <= 6.0等式（1）<？in-line-formula description =“In-line 公式“end =”tail“？>

公开(公告)号：US20050147912A1

公开(公告)日：2005-07-07

申请号：US11067900

申请日：2005-03-01

Applicant: Masahiro Takagi ,  Kazuhiko Yanagida

Inventor： Masahiro Takagi ,  Kazuhiko Yanagida

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G15/00 ,  G03G15/01 ,  G03G21/00 ,  G03G15/08 ,  G03G15/20

CPC classification number: G03G9/0926 ,  G03G9/0902

Abstract: The present invention provides an electrophotographic toner comprising at least a binder resin and a near-infrared light absorbing material containing inorganic material particles, wherein the rate of absorption in the visible region of the electrophotographic toner is 15% or less and the average dispersion diameter of the near-infrared light absorbing material is in a range from 50 nm to 800 nm. The invention also provides an electrophotographic developer comprising the above photographic toner and a carrier. Further, the invention provides an image forming method using the above electrophotographic toner.

公开(公告)号：US20050058923A1

公开(公告)日：2005-03-17

申请号：US10972484

申请日：2004-10-26

Applicant: Takahisa Fujii ,  Yasuo Matsumura ,  Kazuhiko Yanagida ,  Manabu Serizawa ,  Hidekazu Yaguchi ,  Masaki Nakamura ,  Daisuke Ishizuka

Inventor： Takahisa Fujii ,  Yasuo Matsumura ,  Kazuhiko Yanagida ,  Manabu Serizawa ,  Hidekazu Yaguchi ,  Masaki Nakamura ,  Daisuke Ishizuka

IPC: G03G5/05 ,  G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/113

CPC classification number: G03G5/0517 ,  G03G9/0821 ,  G03G9/08795

Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan δ of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G″) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.

Abstract translation: 本发明公开了一种提供高光泽图像的彩色调色剂和具有优异的长期保存性的文件; 静电潜像显影剂; 和图像形成方法。 公开了包含粘合剂树脂和着色剂的彩色调色剂，其中粘合剂树脂的重均分子量为6000至45000，调色剂的玻璃化转变温度（Tg）为40至70℃，损耗角正切tanδ 动态粘弹性在从调色剂的玻璃化转变温度（Tg）到损耗模量（G“）为1×10 5 Pa的温度的温度下为0.1至2.5，并且调色剂包含3至20％的 具有1个以上羧基的脂环族化合物的酯衍生物的质量，以及使用该彩色调色剂的静电潜像显影剂和图像形成方法。

公开(公告)号：US20050008960A1

公开(公告)日：2005-01-13

申请号：US10793736

申请日：2004-03-08

Applicant: Hidekazu Yaguchi ,  Yasuo Matsumura ,  Kazuhiko Yanagida ,  Manabu Serizawa ,  Tsutomu Kubo ,  Shigeru Seitoku

Inventor： Hidekazu Yaguchi ,  Yasuo Matsumura ,  Kazuhiko Yanagida ,  Manabu Serizawa ,  Tsutomu Kubo ,  Shigeru Seitoku

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09

CPC classification number: G03G9/09 ,  G03G9/0804 ,  G03G9/0819 ,  G03G9/0906 ,  G03G9/091 ,  G03G9/092 ,  G03G9/0926

Abstract: A magenta toner for developing electrostatic images provided which contains a binder resin and a colorant, wherein the colorant includes a mixed crystal of two or more colorants and when a solid patch is fixed on art paper complying with the ISO standard by using this toner, a resulting fixed image color satisfies at least one of the following formulae (b*) −7.94(a*)+591.85. The color difference ΔE between the color of the fixed image and the color characterized by L*: 46.6, a*: 75.1 and b*: −4.4 is preferably less than 6. The colorant is preferably a mixed crystal of a quinacridone colorant and a monoazo colorant. Moreover, the invention provides a method for producing the magenta toner, a developer containing the magenta toner, and an image-forming method using the magenta toner.

Abstract translation: 用于显影静电图像的品红色调色剂包含粘合剂树脂和着色剂，其中着色剂包括两种或更多种着色剂的混合晶体，并且当通过使用该调色剂将固体贴片固定在符合ISO标准的工艺纸上时， 得到的固定图像颜色满足以下公式（b *）<0.85（a *）-67.92中的至少一个; 和（b *）> - 7.94（a *）+ 591.85。 固定图像的颜色与以L *：46.6，a *：75.1和b *：-4.4为特征的颜色之间的色差ΔE优选小于6.着色剂优选为喹吖啶酮着色剂和 单偶氮染料。 此外，本发明提供了生产品红色调色剂的方法，含有品红色调色剂的显影剂和使用品红色调色剂的图像形成方法。

公开(公告)号：US06416919B1

公开(公告)日：2002-07-09

申请号：US09676817

申请日：2000-10-02

Applicant: Kazuhiko Yanagida ,  Suk Kim ,  Shigeru Inaba ,  Taku Fukuhara ,  Yasuhiro Oda

Inventor： Kazuhiko Yanagida ,  Suk Kim ,  Shigeru Inaba ,  Taku Fukuhara ,  Yasuhiro Oda

IPC: G03G1309

CPC classification number: G03G9/1075 ,  G03G9/113 ,  G03G9/1133 ,  G03G9/1139

Abstract: The present invention discloses a carrier, which comprises a core and a resin coating layer formed thereon containing electroconductive powder, wherein, when the magnetic brush is formed only of the core, the dynamic electrical resistance of the core forming the magnetic brush under an electric field of 104 V/cm is 1 &OHgr;·cm or less and the electrical resistance of the resin coating layer is from 10 to 1×108 &OHgr;·cm, a developer using the carrier, and an image-forming method using the developer. Owing to the present invention, a superior solid image, which is free of brush marks and carrier beads carry over, can be obtained.

Abstract translation: 本发明公开了一种载体，其包含芯和形成有导电粉末的树脂涂层，其中，当磁刷仅由芯形成时，在电场下形成磁刷的芯的动态电阻 为104欧姆/厘米2，OMEGA·cm以下，树脂被覆层的电阻为10〜1×10 8欧姆计，使用该载体的显影剂，使用该显影剂的成像方法。 由于本发明，可以获得不含刷痕和载体珠的优良固体图像。

公开(公告)号：US5672455A

公开(公告)日：1997-09-30

申请号：US768441

申请日：1996-12-18

Applicant: Kazuhiko Yanagida ,  Susumu Yoshino ,  Takashi Imai ,  Koichi Takahashi ,  Suk Kim

Inventor： Kazuhiko Yanagida ,  Susumu Yoshino ,  Takashi Imai ,  Koichi Takahashi ,  Suk Kim

IPC: G03G9/10 ,  G03G9/113 ,  G03G13/22

CPC classification number: G03G9/1139 ,  G03G9/1133

Abstract: A carrier for an electrostatic latent-image developer, comprising a core material having thereon a coating layer comprising a resin and fine electroconductive particles, the resin having a work function of 4.5 eV or lower. An electrostatic latent-image developer comprising the carrier and a toner and an image forming process are also disclosed. The carrier is capable of maintaining a high build-up speed of electrification and a proper electrification level even when a charge control agent is omitted or used in a slight amount or when the addition amount of an additive such as silica and titanium oxide is reduced so as to prevent carrier fouling with a charge control agent or an external additive and to inhibit a decrease in developer life.

Abstract translation: 一种用于静电潜像显影剂的载体，包括其上具有包含树脂的涂层和细导电颗粒的芯材料，该功能的功函数为4.5eV或更低。 还公开了包含载体和调色剂的静电潜像显影剂和图像形成方法。 即使当少量或少量使用电荷控制剂时，或当二氧化硅和二氧化钛等添加剂的添加量减少时，载体能够保持高电荷积聚速度和合适的充电水平 以防止载体用电荷控制剂或外部添加剂污染并抑制显影剂寿命的降低。