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    Method of producing magnetic recording medium
    3.
    发明授权
    Method of producing magnetic recording medium 失效
    制造磁记录介质的方法

    公开(公告)号：US4260466A

    公开(公告)日：1981-04-07

    申请号：US771583

    申请日：1977-02-24

    申请人： Ryuji Shirahata ,  Tatsuji Kitamoto ,  Yasuyuki Yamada ,  Goro Akashi

    发明人： Ryuji Shirahata ,  Tatsuji Kitamoto ,  Yasuyuki Yamada ,  Goro Akashi

    IPC分类号： G11B5/85 ,  C09D5/23 ,  C23C14/06 ,  C23C14/24 ,  C23C14/34 ,  G11B5/84 ,  G11B5/851 ,  H01F10/02

    CPC分类号： G11B5/8416 ,  C23C14/06 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/31721

    摘要： A method of producing a magnetic recording layer on a support comprising simultaneously depositing a ferromagnetic material and a polymer on a support using a vapor deposition technique such as vacuum deposition, sputtering, etc., thereby to produce thereon a magnetic recording layer of a composite film of the ferromagnetic material and the polymer. A further embodiment for producing a magnetic recording layer comprises simultaneously depositing a ferromagnetic material and a monomer or oligomer on the support using a vapor deposition technique, polymerizing the deposited layer, e.g., using a polymerization catalyst or by applying ionizing or electromagnetic rays thereto, to form a composite film of the ferromagnetic material and the polymer. The magnetic recording layer thus obtained in either embodiment can be used for high density recording.

    摘要翻译： 一种在支撑体上制造磁记录层的方法，包括使用诸如真空沉积，溅射等的气相沉积技术在载体上同时沉积铁磁材料和聚合物，从而在其上制备复合膜的磁记录层 的铁磁材料和聚合物。 用于制造磁记录层的另一实施例包括使用气相沉积技术同时在支撑体上沉积铁磁材料和单体或低聚物，使沉积层聚合，例如使用聚合催化剂或通过向其施加电离或电磁辐射至 形成铁磁材料和聚合物的复合膜。 这样获得的磁记录层可用于高密度记录。

    Process for producing magnetic recording device
    5.
    发明授权
    Process for producing magnetic recording device 失效
    磁记录装置的制造方法

    公开(公告)号：US4368237A

    公开(公告)日：1983-01-11

    申请号：US38620

    申请日：1979-05-14

    申请人： Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    发明人： Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

    CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31511 ,  Y10T428/31609 ,  Y10T428/31725 ,  Y10T428/31935

    摘要： A magnetic recording material having superior abrasion resistance and thermal stability is produced by coating a magnetic coating composition consisting essentially of aqueous emulsions of at least two resin binders capable of reacting with each other upon mixing, and being present therein in the separated state, and a ferromagnetic powder on a non-magnetic support, drying the coating, and curing the resulting magnetic recording layer where drying is insufficient to effect curing. Hazards ascribable to the use of organic solvents in conventional techniques can be obviated by this invention.

    摘要翻译： 具有优异的耐磨性和热稳定性的磁记录材料通过涂覆基本上由至少两种混合后能够彼此反应并且以分离状态存在的树脂粘合剂的水乳液组成的磁性涂料组合物， 铁磁粉末在非磁性载体上，干燥涂层，并固化所得到的磁记录层，其中干燥不足以实现固化。 本发明可以避免归因于常规技术中使用有机溶剂的危害。

    Process for stabilization of ferromagnetic material and magnetic recording member
    6.
    发明授权
    Process for stabilization of ferromagnetic material and magnetic recording member 失效
    强磁性材料和磁记录元件的稳定化工艺

    公开(公告)号：US4015030A

    公开(公告)日：1977-03-29

    申请号：US591681

    申请日：1975-06-30

    申请人： Koji Sasazawa ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    发明人： Koji Sasazawa ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： H01F1/11 ,  C09D5/23 ,  C09D7/12 ,  G11B5/62 ,  G11B5/706 ,  H01F10/02

    CPC分类号： G11B5/70694

    摘要： A process for stabilizing a ferromagnetic material comprising heat-treating a needle-like ferromagnetic material represented by the formula MO.sub.x wherein M is a ferromagnetic metal ion or a ferromagnetic non-metal ion and another metal ion, and x is the degree of oxidation which ranges from 1.36 to 1.47, and containing at least 0.5 atom % Co, at a temperature of at least about 40.degree. C, and a process for stabilizing a magnetic recording member comprising heat-treating a magnetic recording member produced by providing a ferromagnetic recording layer comprising (a) a ferromagnetic material represented by the formula MO.sub.x wherein M and x are the same as defined above, and containing at least 0.5 atom % Co, and (b) a binder, on a support, at a temperature of at least about 40.degree. C.

    摘要翻译： 一种用于稳定铁磁材料的方法，包括热处理由式MOx表示的针状铁磁材料，其中M是铁磁金属离子或铁磁性非金属离子和另一种金属离子，x是氧化程度 1.36至1.47，并且在至少约40℃的温度下含有至少0.5原子％的Co，以及用于稳定磁性记录元件的方法，该方法包括热处理通过提供铁磁性记录层产生的磁性记录元件，所述磁性记录元件包括 （a）由式MOx表示的铁磁材料，其中M和x与上述定义相同，并且在载体上至少包含至少约40的温度下含有至少0.5原子％的Co和（b）粘合剂 DEG C.

    Magnetic recording medium
    7.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4666773A

    公开(公告)日：1987-05-19

    申请号：US585023

    申请日：1984-03-05

    申请人： Tatsuji Kitamoto ,  Goro Akashi

    发明人： Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： G11B5/70 ,  G11B5/845 ,  G11B5/852 ,  H01F10/02

    CPC分类号： G11B5/70 ,  G11B5/845 ,  G11B5/852 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/31678

    摘要： In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a binder, the ferromagnetic particles are given a magnetic anisotropy by a magnetic annealing treatment and the direction of the magnetic anisotropy is vertical mainly to the recording surface. Thus, the vertical magnetization recording is improved.

    摘要翻译： 在包含非磁性载体和涂覆有磁性体的磁记录层的磁记录介质中，铁磁颗粒分散在粘合剂中，铁磁颗粒通过磁性退火处理被赋予磁各向异性，并且磁各向异性方向垂直 主要是记录面。 因此，提高了垂直磁化记录。

    Magnetic recording medium
    8.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4520069A

    公开(公告)日：1985-05-28

    申请号：US375691

    申请日：1982-05-06

    申请人： Tatsuji Kitamoto ,  Goro Akashi

    发明人： Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： G11B5/706 ,  C09D5/23 ,  C09D7/12 ,  G11B5/714 ,  G11B5/845 ,  G11B5/852 ,  G11B5/70 ,  B32B5/30

    CPC分类号： G11B5/714 ,  G11B5/845 ,  G11B5/852 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

    摘要： In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a non-magnetic binder, an improvement consists in that the ferromagnetic particles have a mean particle length of at most 0.3 microns with a length to width ratio of more than 1 but at most 3 and optionally are subjected to an orientation treatment in a magnetic field in the vertical direction to the recording surface.

    摘要翻译： 在包含非磁性载体和涂覆有磁性颗粒的非磁性粘结剂中的磁记录层的磁记录介质中，其改进在于，铁磁性颗粒的平均颗粒长度至多为0.3微米， 长宽比大于1但大于3，并且任选地在与记录表面垂直的方向上的磁场中进行取向处理。

    Process for producing magnetic recording medium
    9.
    发明授权
    Process for producing magnetic recording medium 失效
    磁记录介质的制造方法

    公开(公告)号：US4678682A

    公开(公告)日：1987-07-07

    申请号：US496734

    申请日：1983-05-20

    申请人： Takamitsu Asai ,  Goro Akashi ,  Tatsuji Kitamoto ,  Hiroshi Chikamasa ,  Tsunehiko Sato

    发明人： Takamitsu Asai ,  Goro Akashi ,  Tatsuji Kitamoto ,  Hiroshi Chikamasa ,  Tsunehiko Sato

    IPC分类号： G11B5/845 ,  B05D3/14

    CPC分类号： G11B5/845

    摘要： The perpendicular magnetic orientation of a magnetic layer containing platelet-form ferromagnetic particles coated on a web support is effectively performed by passing a web having thereon the coated magnetic layer in an undried state through a magnetic field formed by plural pairs of opposite pole type magnets disposed in the travelling direction of the web with a gap between adjacent pairs of magnets, while supplying drying air through each gap onto the surface of the travelling web to substantially complete the drying of the coated layer while the web is in the magnetic field. A partition may be inserted in each gap so that the lower end of the partition is close to the upper surface of the travelling web to divide the gap into a front section and a back section, and the drying air may be passed through these sections.

    摘要翻译： 通过使其上具有涂覆的磁性层的卷材在未干燥状态下通过由多对成对的相对极型磁体形成的磁场而使包含在片状载体上的含有片状铁磁颗粒的磁性层的磁性层的垂直磁性取向 在相邻成对的磁体之间具有间隙的幅材的行进方向上，同时通过每个间隙将干燥空气提供到行进幅材的表面上，以在幅材处于磁场的同时基本上完成涂覆层的干燥。 可以在每个间隙中插入隔板，使得隔板的下端靠近行进网的上表面，以将间隙分成前部和后部，并且干燥空气可以通过这些部分。