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6 条记录 (耗时 0.028 秒)

    Stochastic orientation of magnetic recording media
    3.
    发明授权
    Stochastic orientation of magnetic recording media 失效
    磁记录媒体的定位方向

    公开(公告)号：US5153022A

    公开(公告)日：1992-10-06

    申请号：US772901

    申请日：1991-10-08

    申请人： Ronald J. Veitch ,  Gerhard Soehring ,  Helmut Jakusch ,  Volker Koch

    发明人： Ronald J. Veitch ,  Gerhard Soehring ,  Helmut Jakusch ,  Volker Koch

    IPC分类号： G11B5/845

    CPC分类号： G11B5/845

    摘要： A process for the production of magnetic recording media having stochastic orientation of the magnetic anisotropic particles in the magnetic layer with the aid of a magnetic drum rotating above the still fluid dispersion layer and containing radially arranged permanent magnets of alternating polarity, and a corresponding apparatus for carrying out the process.

    摘要翻译： 一种用于制造磁记录介质的方法，该磁记录介质借助于在静止流体分散层上方旋转的磁鼓并且包含径向排列的交替极性的永久磁铁，在磁性层中具有随机取向的磁性各向异性颗粒，以及相应的装置 进行这个过程。

    Temperature indicator for deep-frozen products
    4.
    发明授权
    Temperature indicator for deep-frozen products 失效
    冷冻产品温度指示器

    公开(公告)号：US5490476A

    公开(公告)日：1996-02-13

    申请号：US286253

    申请日：1994-08-08

    申请人： Ronald J. Veitch ,  Helmut Jakusch ,  Peter Heilmann

    发明人： Ronald J. Veitch ,  Helmut Jakusch ,  Peter Heilmann

    IPC分类号： G01K11/06 ,  G01K1/02 ,  G01K1/14

    CPC分类号： G01K11/06

    摘要： An apparatus for checking deep-frozen food, which irreversibly indicates if an additional storage temperature has been exceeded, is described. A flat plastic bag having transparent walls, into which eutectic mixture having a liquid/solid phase transition in the range from 0.degree. to -50.degree. C. has been introduced, together with a magnetic dispersion consisting of finely divided magnetic pigments, has a heat-conducting connection to the material to be frozen. A magnetic stripe which contains a magnetically recorded pattern and which remains connected to the bag until the indicating apparatus together with the material to be frozen has been cooled below the limiting temperature is stuck to the bag. The magnetic stripe is then removed. If the permissible limiting temperature is exceeded, the optically or magnetically readable structure produced by the magnetic stripe in the indicator bag is eliminated, permitting easy checking of the deep-frozen food. The present invention permits many potential variations by combination of a plurality of applied magnetic stripes.

    摘要翻译： 描述了用于检查深冷食品的装置，其不可逆地指示是否超过额外的存储温度。 已经引入了具有透明壁的扁平塑料袋，其中具有在0至-50℃范围内的液/固相变的共晶混合物与由细分散的磁性颜料组成的磁性分散体一起具有热量 与要冷冻的材料进行连接。 包含磁记录图案并且保持连接到袋子直到指示装置与待冷冻材料一起被冷却到极限温度以下的磁条被卡在袋子上。 然后去除磁条。 如果超过允许的极限温度，则消除由指示袋中的磁条产生的光学或磁性可读结构，从而容易地检查深冷食品。 本发明通过组合多个施加的磁条允许许多潜在的变化。

    Preparation of acicular cobalt-containing magnetic iron oxide
    5.
    发明授权
    Preparation of acicular cobalt-containing magnetic iron oxide 失效
    针状钴磁性氧化铁的制备

    公开(公告)号：US5484628A

    公开(公告)日：1996-01-16

    申请号：US291559

    申请日：1994-08-16

    申请人： Ekkehard Schwab ,  Ronald J. Veitch ,  Reinhard Korner ,  Emil Pfannebecker ,  Bernd Hoppner

    发明人： Ekkehard Schwab ,  Ronald J. Veitch ,  Reinhard Korner ,  Emil Pfannebecker ,  Bernd Hoppner

    IPC分类号： C01G49/00 ,  C09C1/24 ,  C09C3/06 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/84 ,  H01F1/11 ,  B05D7/00

    CPC分类号： G11B5/70657 ,  C09C1/24 ,  C09C3/063 ,  C01P2004/10 ,  C01P2004/80 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/42

    摘要： Acicular cobalt-containing magnetic iron oxides having a high coercive force and a core/shell structure and hence low temperature dependence of the coercive force are prepared by a process in which, in a first stage, surface activation is effected by means of iron(II) and cobalt ions under alkaline conditions on the iron oxide core under an inert gas atmosphere and thereafter, in a second stage, an epitactic coating of cobalt ferrite is applied, which coating is formed oxidatively from iron (II) and cobalt (II) hydroxide, likewise under alkaline reaction conditions. The total amount of cobalt ions used for doping remains unchanged compared with the known doped iron oxides or is even smaller. In the second process stage, the achievable coercive force can be controlled by the proportion of air in the gas mixture during the formation of the epitactic coating.

    摘要翻译： 通过一种方法制备具有高矫顽力和核/壳结构并因此矫顽力的低温依赖性的针状含钴磁性氧化铁，其中在第一阶段中，通过铁（II）进行表面活化 ）和钴离子在碱性条件下在惰性气体气氛下在氧化铁芯上，然后在第二阶段施加钴铁氧体的中空涂层，该涂层由铁（II）和氢氧化钴（II）氧化形成 ，同样在碱性反应条件下。 用于掺杂的钴离子的总量与已知的掺杂的氧化铁相比保持不变，或甚至更小。 在第二工艺阶段，可以通过在形成外延涂层期间气体混合物中的空气比例来控制可实现的矫顽力。

    Acicular cobalt-modified iron oxides and their preparation
    6.
    发明授权
    Acicular cobalt-modified iron oxides and their preparation 失效
    精氨酸改性铁氧化物及其制备

    公开(公告)号：US5183709A

    公开(公告)日：1993-02-02

    申请号：US507765

    申请日：1990-05-21

    申请人： Ekkehard Schwab ,  Ronald J. Veitch ,  Helmut Auweter

    发明人： Ekkehard Schwab ,  Ronald J. Veitch ,  Helmut Auweter

    IPC分类号： C01G49/00 ,  G11B5/706 ,  G11B5/712 ,  H01F1/11

    CPC分类号： G11B5/712 ,  G11B5/70694 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： Acicular, cobalt-modified iron oxides consisting of a core of an iron oxide of the formula FeO.sub.x where x is from 1.33 to 1.5 and a ferrite shell which contains a total amount of from 0.4 to 12% by weight of cobalt ions and not more than 5% by weight of iron(II) ions, the percentages being based on the total amount of the material, which iron oxides have improved aging resistance, particularly with regard to the coercive forces, and a process for their preparation.

    摘要翻译： 针状，由铁FeOx的氧化铁核心组成的钴改性的氧化铁，其中x为1.33至1.5，铁氧体壳含有总计为0.4-12重量％的钴离子且不大于 5重量％的铁（II）离子，其百分比基于材料的总量，其中铁氧化物具有改善的耐老化性，特别是关于矫顽力，以及它们的制备方法。