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78 条记录 (耗时 0.021 秒)

    Magnetic recording medium
    1.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4009111A

    公开(公告)日：1977-02-22

    申请号：US624017

    申请日：1975-10-20

    申请人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    发明人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    IPC分类号： B22F9/24 ,  C22C33/02 ,  G11B5/706 ,  B22F3/00 ,  C22C1/04 ,  H01F1/02

    CPC分类号： G11B5/70621 ,  B22F9/24 ,  C22C33/0285 ,  G11B5/70615

    摘要： A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 1500 orsteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gauses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree. C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

    摘要翻译： 一种用于高密度记录的磁记录介质，包括其上具有磁记录层的载体，所述磁记录层包含Fe-Co-Cr-B系统的铁磁性金属粉末，并且在磁性方向上具有约700至1500埃的矫顽力 物质和剩余磁通密度约为1500高斯或以上，在60℃，90％RH的温度条件下保存160小时后的剩余磁通密度为初始值的85％以上 在这些条件下在粘合剂中储存之前。 磁记录介质特别适用于高密度记录，具有足够的灵敏度和优异的电阻。

    Magnetic recording medium
    2.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US3943012A

    公开(公告)日：1976-03-09

    申请号：US498337

    申请日：1974-08-19

    申请人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    发明人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

    IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/047 ,  H01F1/02

    CPC分类号： G11B5/70615 ,  G11B5/70621

    摘要： A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 500 oersteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gausses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree.C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

    摘要翻译： 一种用于高密度记录的磁记录介质，包括其上具有包含Fe-Co-Cr-B系统的铁磁金属粉末的磁记录层的支撑体，并且在磁性方向上具有约700至500奥斯特的矫顽力 物质和约1500高斯或更高的剩余磁通密度，其在60℃和90％RH的温度条件下储存160小时后的剩余磁通密度为其初始值的85％或更多 在这些条件下在粘合剂中储存之前。 磁记录介质特别适用于高密度记录，具有足够的灵敏度和优异的电阻。

    Magnetic recording member
    3.
    发明授权
    Magnetic recording member 失效
    磁记录部件

    公开(公告)号：US4071654A

    公开(公告)日：1978-01-31

    申请号：US608500

    申请日：1975-08-28

    申请人： Hiroshi Ogawa ,  Kazuhide Ishii ,  Matsuaki Nakamura ,  Yasuo Tamai ,  Goro Akashi

    发明人： Hiroshi Ogawa ,  Kazuhide Ishii ,  Matsuaki Nakamura ,  Yasuo Tamai ,  Goro Akashi

    IPC分类号： G11B5/73 ,  G11B5/70 ,  G11B5/78

    CPC分类号： G11B5/70 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/266 ,  Y10T428/269 ,  Y10T428/31

    摘要： A magnetic recording material comprising a non-magnetic flexible support having thereon a magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, the surface of the non-magnetic flexible support having the magnetic recording layer thereon satisfying an S-factor expressed by the following relationship (I-1) ##EQU1## wherein S.sub.1 is the surface roughness in .mu.m of the surface of the non-magnetic flexible support having the magnetic recording layer thereon and d is the thickness in .mu.m of the magnetic recording layer, with the thickness (d) of the magnetic recording layer being about 5 .mu.m or less, and the back surface of the non-magnetic flexible support opposite that having the magnetic recording layer thereon satisfying an S-factor expressed by the following relationship (I-2) ##EQU2## wherein S.sub.2 is the surface roughness in .mu.m of the back surface of the non-magnetic support opposite that having the magnetic recording layer thereon and d is as described above.

    摘要翻译： 一种磁记录材料，包括非磁性柔性载体，其上具有分散在粘结剂中的铁磁性粉末的磁记录层，所述非磁性柔性载体的表面上具有满足下列条件的S因子 关系（I-1）（I-1）其中S1是其上具有磁记录层的非磁性柔性载体的表面的表面粗糙度，其中d是磁体的厚度 记录层，其磁记录层的厚度（d）为约5μm以下，非磁性柔性支持体的背面与上述磁记录层的背面相当，满足下述S表示的S因子 关系（I-2）（I-2）其中S2是与其上具有磁记录层的非磁性载体的背表面的表面粗糙度（μm），d为 上面有肋。

    Magnetic recording member
    5.
    发明授权
    Magnetic recording member 失效
    磁记录部件

    公开(公告)号：US4154895A

    公开(公告)日：1979-05-15

    申请号：US862330

    申请日：1977-12-20

    申请人： Hiroshi Ogawa ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Yasuo Tamai

    发明人： Hiroshi Ogawa ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Yasuo Tamai

    IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/706 ,  G11B5/708 ,  H01F10/02

    CPC分类号： G11B5/70621 ,  G11B5/7021 ,  G11B5/70615 ,  Y10S428/90 ,  Y10T428/31565 ,  Y10T428/31609

    摘要： In a magnetic recording member comprising a non-magnetic support having provided thereon a magnetic layer comprising finely divided ferromagnetic powders dispersed in a binder, in which the binder comprises about 10 to about 70 wt% of (a) a polyester-polyurethane resin and about 30 to about 90 wt% of (b) a synthetic non-drying oil modified alkyd resin and (c) a polyisocyanate, wherein the molar ratio of the isocyanate groups present in the polyisocyanate (c) to the hydroxyl groups present in the synthetic non-drying oil-modified alkyd resin (b) ranges from about 0.8:1 to about 2.0:1. The binder system in accordance with the present invention provides excellent magnetic properties, particularly improved squareness ratio and 5 MHz output. The binder system of the present invention also enables the use of finely divided ferromagnetic alloy powders, with excellent magnetic properties being maintained when magnetic recording members are produced therefrom.

    摘要翻译： 在包括非磁性载体的磁记录元件中，其上设置有包含分散在粘合剂中的细碎铁磁粉末的磁性层，其中粘合剂包含约10至约70重量％的（a）聚酯 - 聚氨酯树脂和约 30重量％至约90重量％的（b）合成非干性油改性醇酸树脂和（c）多异氰酸酯，其中存在于多异氰酸酯（c）中的异氰酸酯基与存在于合成非离子表面活性剂中的羟基的摩尔比 干燥油改性醇酸树脂（b）的范围为约0.8:1至约2.0:1。 根据本发明的粘结剂体系提供优异的磁性，特别是改进的矩形比和5MHz的输出。 本发明的粘合剂体系还能够使用精细分散的铁磁性合金粉末，当由其制造磁性记录元件时，其具有优异的磁性能。

    Ferromagnetic powder for magnetic recording medium and method for preparation thereof
    7.
    发明授权
    Ferromagnetic powder for magnetic recording medium and method for preparation thereof 失效
    磁记录介质用铁磁粉及其制备方法

    公开(公告)号：US3966510A

    公开(公告)日：1976-06-29

    申请号：US497794

    申请日：1974-08-15

    申请人： Masashi Aonuma ,  Yasuo Tamai ,  Goro Akashi

    发明人： Masashi Aonuma ,  Yasuo Tamai ,  Goro Akashi

    IPC分类号： G11B5/712 ,  C09D5/23 ,  C09D7/12 ,  H01F1/06 ,  H01F1/02

    CPC分类号： H01F1/061

    摘要： A ferromagnetic powder which contains at least Fe--B or Fe--Co--B with the surface of the powder having thereon a layer of Cr or a layer mainly consisting of Cr and a method of preparing the ferromagnetic powder comprising reducing a metal salt capable of forming a ferromagnetic powder containing at least Fe or Fe-Co in an aqueous solution thereof with one or more borohydride compounds or derivatives thereof and after the reduction is initiated adding an aqueous solution containing Cr ion or an anion containing Cr.

    摘要翻译： 一种至少含有Fe-B或Fe-Co-B的铁磁粉末，其中粉末的表面上有一层Cr或主要由Cr组成的层，以及制备铁磁性粉末的方法，包括还原金属盐 在一种或多种硼氢化合物或其衍生物的水溶液中形成至少含有Fe或Fe-Co的铁磁粉末，并且在还原开始后，加入含有Cr离子或含Cr的阴离子的水溶液。

    Magnetic recording and reproducing apparatus
    9.
    发明授权
    Magnetic recording and reproducing apparatus 失效
    磁记录和再现设备

    公开(公告)号：US4135218A

    公开(公告)日：1979-01-16

    申请号：US687821

    申请日：1976-05-19

    申请人： Matsuaki Nakamura ,  Tatsuji Kitamoto ,  Yasuo Tamai ,  Koshu Kurokawa

    发明人： Matsuaki Nakamura ,  Tatsuji Kitamoto ,  Yasuo Tamai ,  Koshu Kurokawa

    IPC分类号： G11B5/48 ,  G11B5/53 ,  G11B5/55 ,  G11B5/14 ,  G11B5/12

    CPC分类号： G11B5/531 ,  G11B5/488 ,  G11B5/5521

    摘要： A magnetic recording and reproducing apparatus provided with a magnetic head device comprising a supporting means having a recording magnetic head made of an alloy system magnetic material and a reproducing magnetic head made of a ferrite system magnetic material. The recording and reproducing heads are fixed relative to one another thereby eliminating the need for completely separate head mechanisms and for complex mechanisms to reliably interchange the positions of the two heads relative to the recording medium.

    摘要翻译： 一种具有磁头装置的磁记录和再现装置，包括具有由合金系磁性材料制成的记录磁头的支撑装置和由铁氧体系磁性材料制成的再现磁头。 记录和再现头相对固定，从而不需要完全分离的头部机构，并且用于复杂的机构可靠地将两个头部相对于记录介质的位置交换。