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    Magnetic toner, apparatus unit and image forming method
    11.
    发明授权
    Magnetic toner, apparatus unit and image forming method 失效
    磁性调色剂，设备单元和成像方法

    公开(公告)号：US5858593A

    公开(公告)日：1999-01-12

    申请号：US902323

    申请日：1997-07-29

    申请人： Osamu Tamura ,  Koichi Tomiyama ,  Nobuyuki Okubo ,  Shunji Suzuki ,  Yoshihiro Ogawa ,  Keita Nozawa

    发明人： Osamu Tamura ,  Koichi Tomiyama ,  Nobuyuki Okubo ,  Shunji Suzuki ,  Yoshihiro Ogawa ,  Keita Nozawa

    IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G13/09 ,  G03G15/08 ,  G03G15/09

    CPC分类号： G03G9/0835 ,  G03G13/09 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0833

    摘要： Disclosed are a magnetic toner for developing an electrostatic latent image comprising magnetic toner particles containing a binder resin of 100 parts by weight and a magnetic substance of 20 to 150 parts by weight, and an apparatus unit and an image forming method for employing the magnetic toner. A frictional electrification property is such that the absolute value of the frictional electrification amount relative to an iron powder of 250 mesh-pass to 350 mesh-on is 25 to 40 mc/kg. Assuming that for particle distribution of the magnetic toner a weight-average particle diameter (D.sub.4) for the magnetic toner is X (.mu.m) and that a count % in a count distribution of magnetic toner particles that have a diameter of 3.17 .mu.m or smaller is Y (%), expressions (1) and (2) are satisfied:-5X+35.ltoreq.Y.ltoreq.-25X+180 (1)3.5.ltoreq.X.ltoreq.6.5 (2).Sphericity (.psi.) of particles is equal to or greater than 0.80 and a product (.sigma..sub.r .times.H.sub.c) of remanence �.sigma..sub.r (Am.sup.2 /kg)! and coercive force (H.sub.c (kA/m)! of the magnetic substance in a magnetic field of 795.8 kA/m (10 k oersted) is 10 to 56 (kA.sup.2 m/kg).

    摘要翻译： 公开了一种用于显影静电潜像的磁性调色剂，其包含含有100重量份的粘合剂树脂的磁性调色剂颗粒和20至150重量份的磁性物质，以及用于使用磁性调色剂的装置单元和图像形成方法 。 摩擦带电特性使得相对于250目通过至350目的铁粉的摩擦带电量的绝对值为25〜40mc / kg。 假设对于磁性调色剂的颗粒分布，磁性调色剂的重均粒径（D4）为X（μm），并且磁性调色剂颗粒的计数分布的计数％为直径为3.17μm，或 较小的是Y（％），表达式（1）和（2）满足：-5X + 35

    Toner for developing electrostatic images, detachable apparatus, image forming apparatus and facsimile apparatus
    13.
    发明授权
    Toner for developing electrostatic images, detachable apparatus, image forming apparatus and facsimile apparatus 失效
    用于显影静电图像的调色剂，可拆卸装置，图像形成装置和传真装置

    公开(公告)号：US5422707A

    公开(公告)日：1995-06-06

    申请号：US304823

    申请日：1994-09-13

    申请人： Tsuyoshi Takiguchi ,  Tsutomu Kukimoto ,  Koichi Tomiyama ,  Hiroshi Yusa ,  Tetsuhito Kuwashima

    发明人： Tsuyoshi Takiguchi ,  Tsutomu Kukimoto ,  Koichi Tomiyama ,  Hiroshi Yusa ,  Tetsuhito Kuwashima

    IPC分类号： G03G9/087 ,  G03G9/083 ,  G01D15/06 ,  G03G15/06 ,  H04N1/21

    CPC分类号： G03G9/08728 ,  G03G9/08711 ,  Y10S430/105

    摘要： A toner for developing an electrostatic image, comprises a binder resin and a colorant. The toner has a glass transition temperature (Tg) of 65.degree. C. or lower. The binder resin comprises a styrene-acrylic copolymer formed from at least a styrenic monomer and a mixture of two or more acrylic monomers. The binder resin contains 10% by weight or more of THF insolubles. The amount of the styrenic monomer remaining in the toner is 0.005 part or less by weight based on 100 parts by weight of the binder resin component in the toner (50 ppm), and the amount of the acrylic monomers remaining in said toner is 0.001 part by weight based on 100 parts by weight or less of the binder resin component in the toner (10 ppm). At least one component of the mixture of acrylic monomers has a Q-value of 0.5 to less than 1.0 and the other has a Q-value of 0.3 to less than 0.5.This toner is excellent in the anti-off-set property to a fixing roller surface, good in fixability, giving high image density and little odor.

    摘要翻译： 用于显影静电图像的调色剂包括粘合剂树脂和着色剂。 调色剂的玻璃化转变温度（Tg）为65℃以下。 粘合剂树脂包括由至少苯乙烯单体和两种或更多种丙烯酸单体的混合物形成的苯乙烯 - 丙烯酸共聚物。 粘合剂树脂含有10重量％以上的THF不溶物。 调色剂中剩余的苯乙烯类单体的量相对于调色剂中的粘合剂树脂成分100重量份（50ppm）为0.005重量份，残留在所述调色剂中的丙烯酸类单体的量为0.001份 （10ppm）中的100重量份以下的粘合剂树脂成分。 丙烯酸类单体的混合物的至少一种成分的Q值为0.5〜小于1.0，另外Q值为0.3〜小于0.5。 该调色剂在定影辊表面的防脱离性方面优异，定影性良好，图像密度高，气味少。

    Toner for developing electrostatic image and process for production thereof
    14.
    发明授权
    Toner for developing electrostatic image and process for production thereof 失效
    用于显影静电图像的调色剂及其生产方法

    公开(公告)号：US5338638A

    公开(公告)日：1994-08-16

    申请号：US797992

    申请日：1991-11-26

    申请人： Kiyoko Tsuchiya ,  Koichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Hiroshi Yusa

    发明人： Kiyoko Tsuchiya ,  Koichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Hiroshi Yusa

    IPC分类号： G03G9/087

    CPC分类号： G03G9/08708 ,  G03G9/08706 ,  G03G9/08793 ,  G03G9/08795

    摘要： A toner for developing an electrostatic image is provided as a pulverized mixture including a binder resin and a colorant. The binder resin is characterized by a molecular weight distribution on a GPC chromatogram of its tetrahydrofuran (THF)-soluble resin content including at least 15% and below 35% of a resin component in a molecular weight region of at most 5000 and at least 3 wt. % of a resin component in a molecular weight region of at least 5.times.10.sup.6 and showing a main peak in a molecular weight region of 5000 to 10.sup.5. The binder resin also has an acid value of 2-100 mg KOH/g. The THF-soluble resin component in the molecular weight region of at least 5.times.10.sup.6 is enriched during a melt-kneading step during the toner production.

    摘要翻译： 提供用于显影静电图像的调色剂作为包括粘合剂树脂和着色剂的粉碎混合物。 粘合剂树脂的特征在于其四氢呋喃（THF）可溶性树脂含量的GPC色谱图中的分子量分布，其包含至少15％且低于35％的分子量区域中的树脂组分的至多5000和至少3 重量 ％的分子量区域中的树脂组分为至少5×10 6，并且在5000至105的分子量范围内显示出主峰。粘合剂树脂的酸值为2-100mg KOH / g。 在调色剂生产过程中，在熔融捏合步骤期间富含至少5×10 6分子量的THF可溶性树脂组分。

    Magnetic toner for developing electrostatic images, process for producing it, image forming method and process cartridge
    17.
    发明授权
    Magnetic toner for developing electrostatic images, process for producing it, image forming method and process cartridge 失效
    用于显影静电图像的磁性调色剂，其制造方法，成像方法和处理盒

    公开(公告)号：US06238834B1

    公开(公告)日：2001-05-29

    申请号：US09084993

    申请日：1998-05-28

    申请人： Osamu Tamura ,  Koichi Tomiyama ,  Shunji Suzuki ,  Yoshihiro Ogawa

    发明人： Osamu Tamura ,  Koichi Tomiyama ,  Shunji Suzuki ,  Yoshihiro Ogawa

    IPC分类号： G03G9083

    CPC分类号： G03G9/0819 ,  G03G9/081 ,  G03G9/0821 ,  G03G9/0835 ,  G03G9/09725

    摘要： A magnetic toner for developing an electrostatic image is comprised of magnetic toner particles containing at least a binder resin, a magnetic fine powder and a wax. The magnetic toner particles have a weight-average particle diameter of from 3.5 to 6.5 &mgr;m, and a dispersion prepared by dispersing 15 mg of the magnetic toner particles in 19 ml of an aqueous solution of ethyl alcohol and water in a volume ratio of 27:73 has an absorbance of from 0.2 to 0.7 at a wavelength of 600 nm. A process for producig such a magnetic toner is charcterized by, especially, the melt-kneading step carried out under the following conditions: 2.2×103≦E/&egr;≦2.0×104 E=k&ohgr;2T, &egr;=F/(&pgr;D2L) wherein &ohgr; represents a screw rotational speed (m/min), T represents a preset temperature (K), F represents a feed rate (kg/min) of a mixture of a binder resin, a magnetic fine powder and a wax, D represents a cylinder inner diameter (m), L represents a screw effective length (m), &pgr; represents the circular constant, and k represents (D0/D)2, where D0 is 0.1 m.

    摘要翻译： 用于显影静电图像的磁性调色剂由至少含有粘合剂树脂，磁性细粉和蜡的磁性调色剂颗粒组成。 磁性调色剂颗粒的重均粒径为3.5至6.5μm，并且通过将15mg磁性调色剂颗粒分散在19ml乙醇和水的水溶液中而制得的分散体积比为27： 73在波长600nm处的吸光度为0.2〜0.7。制造这种磁性调色剂的方法特别是在以下条件下进行的熔融捏合步骤：其中ω表示螺杆转速（ m / min），T表示预设温度（K），F表示粘合剂树脂，磁性细粉末和蜡的混合物的进料速度（kg / min），D表示气缸内径（m） L表示螺杆有效长度（m），pi表示圆形常数，k表示（D0 / D）2，其中D0为0.1μm。

    Toner for developing electrostatic images image forming method and process cartridge
    18.
    发明授权
    Toner for developing electrostatic images image forming method and process cartridge 失效
    用于显影静电图像的调色剂，成像方法和处理盒

    公开(公告)号：US6060202A

    公开(公告)日：2000-05-09

    申请号：US046435

    申请日：1998-03-24

    申请人： Yoshihiro Ogawa ,  Koichi Tomiyama ,  Keita Nozawa ,  Shunji Suzuki

    发明人： Yoshihiro Ogawa ,  Koichi Tomiyama ,  Keita Nozawa ,  Shunji Suzuki

    IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G13/08

    CPC分类号： G03G9/0819 ,  G03G9/097

    摘要： An electrophotographic toner including a blend of toner particles, and external additive particles, is provided with characteristic particle size distribution conditions, i.e., (i) a particle size distribution based on a Coulter counter measurement, including a weight-average particle size D4 of X .mu.m and Y % by number of particles having sizes of 2.00-3.17 .mu.m satisfying:-5X+35.ltoreq.Y.ltoreq.-25X+180 (1)3.5.ltoreq.X.ltoreq.6.5 (2), and(ii) a particle size distribution based on a flow particle image analyzer measurement, including A % by number of particles having circle-equivalent diameters of at least 1.00 .mu.m and below 1.03 .mu.m and B % by number of particles having circle-equivalent diameters of at least 2.00 .mu.m and below 2.06 .mu.m satisfying:B-A.ltoreq.0.30 (3).As a result, the toner is provided with a stable developing performance even in a long period of continuous image formation in a high temperature/high humidity environment.

    摘要翻译： 包括调色剂颗粒和外部添加剂颗粒的混合物的电子照相调色剂具有特征粒度分布条件，即（i）基于库尔特计数器测量的粒度分布，包括X的重均粒径D4 μm和Y％，其粒径为2.00-3.17μm，满足：-5X + 35

    Magnetic toner, magnetic developer, apparatus unit, image forming apparatus and facsimile apparatus
    20.
    发明授权
    Magnetic toner, magnetic developer, apparatus unit, image forming apparatus and facsimile apparatus 失效
    磁性调色剂，磁性显影剂，装置单元，图像形成装置和传真装置

    公开(公告)号：US5424810A

    公开(公告)日：1995-06-13

    申请号：US942840

    申请日：1992-09-10

    申请人： Koichi Tomiyama ,  Hiroyuki Suematsu ,  Masayoshi Kato ,  Hiroshi Yusa ,  Takakuni Kobori

    发明人： Koichi Tomiyama ,  Hiroyuki Suematsu ,  Masayoshi Kato ,  Hiroshi Yusa ,  Takakuni Kobori

    IPC分类号： G03G9/083 ,  G03G15/09

    CPC分类号： G03G9/0834

    摘要： A magnetic toner for electrophotography is composed from a binder resin and a silicon-containing magnetic iron oxide. The magnetic toner has a weigh-average particle size o at most 13.5 .mu.m and has a particle size distribution such that it contains o more than 50 wt, % of magnetic toner particles having a particle size of at least 12.7 .mu.m. The magnetic toner is able to show high developing performances because of richness in fine particles and is also provided with an improved environmental stability because the magnetic iron oxide used therein contains 0.5-4 wt, % silicon (based on total iron content) and has a specific silicon distribution such that the magnetic iron oxide has a total silicon content (A), a silicon content (B) dissolved together with the magnetic iron oxide when the magnetic iron oxide is dissolved up to 20 wt, % dissolution of iron, and a superficial silicon content (C), satisfying relations of B/A=44-84% and C/A=10-55%. The performances are enhanced if the magnetic toner is blended with additives such as inorganic fine powder or resin fine particles.

    摘要翻译： 用于电子照相的磁性调色剂由粘合剂树脂和含硅磁性氧化铁组成。 磁性调色剂具有至多13.5μm的重均粒径，并且具有使其含有超过50重量％的粒径至少为12.7μm的磁性调色剂颗粒的粒度分布。 磁性调色剂由于细颗粒的丰富性而能够显示高显影性能，并且由于其中使用的磁性氧化铁含有0.5-4重量％的硅（基于总铁含量）并具有改善的环境稳定性，并且具有 磁性氧化铁具有总硅含量（A），当磁性氧化铁被溶解时与磁性氧化铁溶解在一起的硅含量（B）高达20重量％，铁溶解度高， 表面硅含量（C），满足B / A = 44-84％和C / A = 10-55％的关系。 如果将磁性调色剂与无机细粉或树脂微粒等添加剂混合，则性能得到提高。