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    • 1. 发明授权
    • Magnetic toner, apparatus unit and image forming method
    • 磁性调色剂,设备单元和成像方法
    • US5858593A
    • 1999-01-12
    • US902323
    • 1997-07-29
    • Osamu TamuraKoichi TomiyamaNobuyuki OkuboShunji SuzukiYoshihiro OgawaKeita Nozawa
    • Osamu TamuraKoichi TomiyamaNobuyuki OkuboShunji SuzukiYoshihiro OgawaKeita Nozawa
    • G03G9/08G03G9/083G03G13/09G03G15/08G03G15/09
    • G03G9/0835G03G13/09G03G9/0819G03G9/0821G03G9/0833
    • 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).
    • 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
    • 3. 发明授权
    • Toner and image forming method
    • 调色剂和成像方法
    • US5976752A
    • 1999-11-02
    • US135167
    • 1998-08-18
    • Satoshi MatsunagaKoichi TomiyamaYuichi MizohKeita NozawaMinekazu EndoTadashi DoujoYoshihiro OgawaNene Shibayama
    • Satoshi MatsunagaKoichi TomiyamaYuichi MizohKeita NozawaMinekazu EndoTadashi DoujoYoshihiro OgawaNene Shibayama
    • G03G9/087G03G9/097G03G13/22
    • G03G9/08755G03G9/087G03G9/08702G03G9/08711G03G9/08728G03G9/08797
    • An electrophotographic toner is composed of at least a binder resin, a colorant, and a wax. The binder resin (a) comprises a polyester resin, a vinyl resin and a hybrid resin component comprising a polyester unit and a vinyl polymer unit, (b) has a THF (tetrahydrofuran)-soluble content (W1) of 50-85 wt. % and a THF-insoluble content (W2) of 5-50 wt. %, an ethyl acetate-soluble content (W3) of 40-98 wt. % and an ethyl acetate-insoluble content (W4) of 2-60 wt. %, a chloroform-soluble content (W5) of 55-90 wt. % and a chloroform-insoluble content (W6) of 10-45 wt. %, respectively after 10 hours of Soxhlet extraction with respective solvents, giving a ratio W4/S6 of 1.1-4.0, and contains a THF-soluble content providing a GPC (gel permeation chromatography) chromatogram exhibiting a main peak in a molecular weight range of 4000-9000, including 35.0-65.0% (A1) of a component haing molecular weights in a range of 500 to below 1.times.10.sup.4, 25.0-45.0% (A2) of a component having molecular weights in a range of 1.times.10.sup.4 to below 1.times.10.sup.5 and 10.0-30.0% (A3) of a component having molecular weights of at least 1.times.10.sup.5 giving a ratio A1/A2 of 1.05-2.00. The binder resin shows good dispersibility of wax and colorant.
    • 电子照相调色剂由至少粘合剂树脂,着色剂和蜡组成。 粘合剂树脂(a)包括聚酯树脂,乙烯基树脂和包含聚酯单元和乙烯基聚合物单元的混合树脂组分,(b)具有50-85重量%的THF(四氢呋喃) - 可溶成分(W1) %和THF不溶物含量(W2)为5-50wt。 %,40-98重量%的乙酸乙酯可溶物含量(W3) %,乙酸乙酯不溶物含量(W4)为2-60wt。 %,55-90重量%的氯仿可溶物含量(W5) %,氯仿不溶物含量(W6)为10-45wt。 %,分别用各自的溶剂提取索氏提取10小时后,得到比例W4 / S6为1.1-4.0,并含有THF可溶性成分,提供在分子量范围内显示主峰的GPC(凝胶渗透色谱)色谱图 4000-9000,包括分子量在500至低于1×10 4范围内的分子量为35.0-65.0%(A1),分子量为1×104至低于1×10 5的组分的25.0-45.0%(A2)和10.0 -30.0%(A3)的分子量为至少1×10 5的组分,其A1 / A2比为1.05-2.00。 粘合剂树脂表现出良好的蜡和着色剂的分散性。
    • 5. 发明授权
    • Magnetic toner for developing electrostatic images, process for producing it, image forming method and process cartridge
    • 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
    • US06238834B1
    • 2001-05-29
    • US09084993
    • 1998-05-28
    • Osamu TamuraKoichi TomiyamaShunji SuzukiYoshihiro Ogawa
    • Osamu TamuraKoichi TomiyamaShunji SuzukiYoshihiro Ogawa
    • G03G9083
    • G03G9/0819G03G9/081G03G9/0821G03G9/0835G03G9/09725
    • 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.
    • 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。
    • 9. 发明授权
    • Seal structure and control valve using said seal structure
    • 密封结构和控制阀采用上述密封结构
    • US07988125B2
    • 2011-08-02
    • US11919240
    • 2006-04-21
    • Ryosuke ChoYoshihiro OgawaKohei Fukudome
    • Ryosuke ChoYoshihiro OgawaKohei Fukudome
    • F16K31/02
    • F16K31/0603F16J15/164F16J15/3204F16J15/3448F16K1/34F16K41/04
    • A seal structure sealing a fitted part between the guide surface of a bearing part and a shaft part to prevent a fluid from flowing in a direction from a high-pressure fluid side to a low-pressure fluid side. The seal structure comprises a seal ring storage part having a radial contact surface surrounding the shaft part which is formed on the high-pressure fluid side of the bearing part and a seal ring disposed in the seal ring storage part, allowing its side surface facing the contact surface to come into contact with the contact surface, and allowing its inner peripheral surface to be fitted to the outer peripheral surface of the shaft part. The seal ring is formed in such a relative dimension that, even if elastically deformed by the pressure of the sealed fluid, the elastically deformed expanded portion thereof is not brought into contact with the peripheral surface of the seal ring storage part.
    • 密封结构,其密封轴承部件的引导面与轴部之间的嵌合部,防止流体从高压流体侧向低压流体侧流动。 该密封结构包括密封环收纳部,该密封环收纳部具有包围形成在轴承部的高压流体侧的轴部的径向接触面和设置在密封环收容部中的密封环,使其侧面朝向 接触面与接触面接触,并且允许其内周面与轴部的外周面嵌合。 密封环形成为相对尺寸,即使被密封流体的压力弹性变形,其弹性变形扩大部分也不会与密封环收纳部的周面接触。