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    Magnetic recording medium
    21.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4423453A

    公开(公告)日：1983-12-27

    申请号：US283099

    申请日：1981-07-13

    Applicant: Hiroshi Kawahara ,  Hitoshi Azegami ,  Eiji Horigome

    Inventor： Hiroshi Kawahara ,  Hitoshi Azegami ,  Eiji Horigome

    IPC: C09D5/23 ,  C09D7/12 ,  G11B5/716 ,  G11B23/00 ,  B32B7/02

    CPC classification number: G11B5/716 ,  Y10S428/90 ,  Y10T428/24942

    Abstract: A magnetic recording medium having two coated magnetic layers of a first magnetic layer and a second magnetic layer on a non-magnetic substrate. The first magnetic layer has a coercive force of 400 to 590 Oe and a thickness of 2.1 to 2.8.mu. and said second magnetic layer has a coercive force of 590 to 800 Oe and a thickness of at least 2.1.mu..

    Abstract translation: 一种在非磁性基板上具有第一磁性层和第二磁性层的两个涂覆磁性层的磁记录介质。 第一磁性层的矫顽力为400〜590Oe，厚度为2.1〜2.8μm，第二磁性层的矫顽力为590〜800Oe，厚度为2.1μm以上。

    Magnetic tape cassette
    23.
    发明授权
    Magnetic tape cassette 失效
    磁带盒

    公开(公告)号：US4380035A

    公开(公告)日：1983-04-12

    申请号：US184063

    申请日：1980-09-04

    Applicant: Hiroshi Ota ,  Eiji Horigome ,  Hitoshi Azegami

    Inventor： Hiroshi Ota ,  Eiji Horigome ,  Hitoshi Azegami

    IPC: G11B23/087 ,  G11B23/04

    CPC classification number: G11B23/08771

    Abstract: A magnetic tape cassette comprises a pad support membrane made of a metal alloy such as bronze and nickel silver. The pad support membrane is coated with a synthetic resin layer containing a rust inhibitor.

    Abstract translation: 磁带盒包括由诸如青铜和镍银之类的金属合金制成的衬垫支撑膜。 衬垫支撑膜涂有含防锈剂的合成树脂层。

    Magnetic recording medium and process
    24.
    发明授权
    Magnetic recording medium and process 失效
    磁记录介质和工艺

    公开(公告)号：US4289828A

    公开(公告)日：1981-09-15

    申请号：US98242

    申请日：1979-11-28

    Applicant: Hiroshi Ota ,  Eiji Horigome ,  Hitoshi Azegami

    Inventor： Hiroshi Ota ,  Eiji Horigome ,  Hitoshi Azegami

    IPC: G11B5/71 ,  C09D5/23 ,  G11B5/70 ,  B32B27/40

    CPC classification number: G11B5/7013 ,  Y10S428/90 ,  Y10T428/31565 ,  Y10T428/31609 ,  Y10T428/31794 ,  Y10T428/31935

    Abstract: A magnetic recording medium made by coating a base with a magnetic coating material which is a dispersion of magnetic particles in a binder of synthetic resins using a polyfunctional aromatic isocyanate as a curing agent, characterized by the addition of a sorbitan stearate type surface active agent which has a sorbitol derivative in the hydrophilic group. The present magnetic recording medium has superior mechanical properties, especially a superior running quality as well as superior electromagnetic properties.

    Abstract translation: 使用多官能芳族异氰酸酯作为固化剂的磁性涂料将磁性粒子分散在合成树脂的粘合剂中的磁性涂料进行涂布而成的磁记录介质，其特征在于添加脱水山梨糖醇硬脂酸酯型表面活性剂，其中， 在亲水基团中具有山梨糖醇衍生物。 本磁记录介质具有优异的机械性能，特别是优越的运行质量以及优异的电磁特性。

    Magnetic recording medium
    27.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4615949A

    公开(公告)日：1986-10-07

    申请号：US755630

    申请日：1985-07-12

    Applicant: Kuniichi Yoda ,  Yuji Ishihara ,  Hitoshi Azegami

    Inventor： Kuniichi Yoda ,  Yuji Ishihara ,  Hitoshi Azegami

    IPC: G11B5/84 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/70

    CPC classification number: G11B5/7022 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/31609 ,  Y10T428/31935

    Abstract: A magnetic recording medium comprises a magnetic coating material, or a dispersion of magnetic particles in a resinous binder, and a base to which the coating material is solidly applied, the resinous binder comprising as its ingredients a copolymer composed of vinyl chloride, vinylidene chloride, a vinyl alkylcarboxylate, another monomer copolymerizable with vinyl chloride, and a saponified vinyl alkylcarboxylate and having an OH/CH absorption ratio according to the infrared absorption spectrum of at least 0.2, a polyurethane resin having in its molecule a --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyisocyanate.

    Abstract translation: 磁记录介质包括磁性涂层材料，或者在树脂粘合剂中的磁性颗粒的分散体和固体涂覆材料的基底，该树脂粘合剂包括由氯乙烯，偏二氯乙烯， 乙烯基烷基羧酸酯，可与氯乙烯共聚的另一种单体，以及皂化的乙烯基烷基羧酸酯，并且具有至少0.2的红外吸收光谱的OH / CH吸收比，在其分子中具有-SO 3 M基团的聚氨酯树脂，其中M表示 碱金属原子和多异氰酸酯。

    Magnetic recording medium
    29.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4464433A

    公开(公告)日：1984-08-07

    申请号：US357300

    申请日：1982-03-11

    Applicant: Kenji Hirabayashi ,  Hitoshi Azegami

    Inventor： Kenji Hirabayashi ,  Hitoshi Azegami

    IPC: G11B5/70 ,  G11B5/706 ,  B32B15/00 ,  B05D5/12

    CPC classification number: G11B5/70 ,  G11B5/70673 ,  Y10T428/263 ,  Y10T428/265

    Abstract: A magnetic recording medium which has dynamic range (I) of 70 dB or more and dynamic range (II) of 45 dB or more in control of a thickness of a magnetic layer and magnetic characteristics wherein said dynamic range (I) is given as a difference between an output at 3% input level of third harmonic wave output at a wavelength of 237.5 .mu.m in the optimum bias recording by a head having a recorded width of 1 to 1.1 mm based on an output of the original signal and a reproduced output calibrated by auditory sense calibration at non-signal recording in the bias and said dynamic range (II) is given as a difference between a saturated output at a wavelength of 4.75 .mu.m under the same condition and the reproduced output calibrated by the A-curve calibration at non-signal recording in the bias.

    Abstract translation: 具有70dB以上的动态范围（I）和45dB或更大的动态范围（II）的磁记录介质，用于控制磁性层的厚度和磁特性，其中所述动态范围（I）被给定为 基于原始信号的输出，记录宽度为1〜1.1mm的磁头在最佳偏置记录中，波长为237.5μm的三次谐波输出的3％输入电平的输出之间的差值，再生输出 通过在偏置下的非信号记录下的听觉校准校准，并且所述动态范围（II）被给定为在相同条件下波长4.75μm的饱和输出与通过A曲线校准的再现输出之间的差 校准在非信号记录的偏差。

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