利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.026 秒)

    Method and device for determining the homogeneity of magnetic dispersions
    3.
    发明授权
    Method and device for determining the homogeneity of magnetic dispersions 失效
    用于确定磁性分散体的均匀性的方法和装置

    公开(公告)号：US4243059A

    公开(公告)日：1981-01-06

    申请号：US908446

    申请日：1978-05-22

    申请人： Fritz Hammon ,  Manfred Ohlinger ,  Job-Werner Hartmann

    发明人： Fritz Hammon ,  Manfred Ohlinger ,  Job-Werner Hartmann

    IPC分类号： G01R33/00 ,  G01N27/72 ,  G01N27/74 ,  G01R33/12 ,  G11B5/84 ,  G11B5/845

    CPC分类号： G11B5/845 ,  G01R33/1207 ,  Y10T137/0324 ,  Y10T137/2579

    摘要： In order to determine the homogeneity of a magnetic dispersion, part of the dispersion is conducted through a measuring cell prior to its application to a base, the size, number and type of those regions of the magnetic dispersion which interfere with the homogeneity being determined with the aid of magnetic measurements. The measuring cell contains a magnetic head, a magnetic dispersion is made to flow in a stream of constant cross section past the air gap of the magnetic head, and a magnetic field at least partially penetrating the magnetic dispersion is produced. From the characteristics of the amplified output voltage of the magnetic head the various parameters of the inhomogeneities in the magnetic dispersion can then be ascertained.

    摘要翻译： 为了确定磁性分散体的均匀性，分散体的一部分在施加到基底之前通过测量单元进行，磁性分散体的干扰均匀性的区域的尺寸，数量和类型由 辅助磁测量。 测量单元包含磁头，使磁性分散体以恒定横截面流过磁头的气隙，产生至少部分穿透磁性分散体的磁场。 根据磁头的放大输出电压的特性，可以确定磁性色散中的不均匀性的各种参数。

    Magnetic recording media
    4.
    发明授权
    Magnetic recording media 失效
    磁记录媒体

    公开(公告)号：US3996407A

    公开(公告)日：1976-12-07

    申请号：US533973

    申请日：1974-12-18

    申请人： Egon Von Gross ,  Heinz Stritzinger ,  Job-Werner Hartmann ,  Manfred Steuerwald ,  Ursula Klein ,  Dieter Schaefer

    发明人： Egon Von Gross ,  Heinz Stritzinger ,  Job-Werner Hartmann ,  Manfred Steuerwald ,  Ursula Klein ,  Dieter Schaefer

    IPC分类号： C09D5/23 ,  G11B5/702 ,  B32B5/16 ,  B32B9/04

    CPC分类号： G11B5/7023 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/31663 ,  Y10T428/31667

    摘要： Magnetic recording media comprising a non-magnetizable flexible base and a firmly adhering magnetic coating based on a dispersion, containing a silane, of a magnetic pigment in a polymeric binder, and a process for their manufacture. The silane is an aminoalkylsilane R.sub.n Si(OR').sub.4-n, wherein n is 1, 2 or 3, R' is alkyl of 1 to 8 carbon atoms and R is aminoalkyl of the formula with one or more primary and/or secondary amino groups and from 3 to 11 carbon atoms. Magnetic recording media comprising a magnetic coating containing such a silane exhibit better abrasion resistance and better electromagnetic properties than comparable coatings.

    摘要翻译： 磁性记录介质包括不可磁化的柔性基底和基于包含硅烷的分散体的牢固粘附的磁性涂层，所述分散体包含聚合物粘合剂中的磁性颜料及其制造方法。 硅烷是氨基烷基硅烷RnSi（OR'）4-n，其中n是1,2或3，R'是1至8个碳原子的烷基，R是具有一个或多个伯和/或仲氨基的氨基烷基 基团和3至11个碳原子。 包含含有这种硅烷的磁性涂层的磁记录介质比同类涂层表现出更好的耐磨性和更好的电磁特性。

    Device for the magnetic orientation of magnetic recording media
    5.
    发明授权
    Device for the magnetic orientation of magnetic recording media 失效
    磁记录介质的磁性定向装置

    公开(公告)号：US4043297A

    公开(公告)日：1977-08-23

    申请号：US731140

    申请日：1976-10-12

    申请人： Job-Werner Hartmann ,  Roland Falk ,  Aribert Krug ,  Georg Huber ,  Werner Balz ,  Karl Mahler

    发明人： Job-Werner Hartmann ,  Roland Falk ,  Aribert Krug ,  Georg Huber ,  Werner Balz ,  Karl Mahler

    IPC分类号： G11B5/845 ,  B05C11/00

    CPC分类号： G11B5/845

    摘要： A process and apparatus for producing magnetic discs in which the preferred direction of orientation of the anisotropic magnetic particles, contained in an organic binder system, is tangential to the circumference of the disc. Orientation is effected, prior to solidification of the magnetic layer, by the action of a magnetic field which is formed in the plane of symmetry between at least two pairs of magnetic poles, the poles of each pair being of the same polarity and opposite each other. One pair of poles flares out in cross section toward the plane of symmetry between the pairs of poles, whereas the other pair or pairs of poles of opposite polarity, when viewed in cross section, taper toward the said plane of symmetry to a point, the distance between the poles of such pair(s) being greater than that between the flared poles, and the plane of symmetry of the pairs of poles being in the plane of the disc. Using this process and apparatus, magnetic discs with a non-magnetic metallic base are obtained, in which the anisotropic magnetic particles in the layer of fluid binder applied to the base are oriented tangentially to the circumference of the disc during spin-coating.

    摘要翻译： 用于制造磁盘的方法和装置，其中包含在有机粘合剂系统中的各向异性磁性颗粒的优选取向方向与盘的圆周相切。 在磁性层凝固之前，通过在至少两对磁极之间的对称平面中形成的磁场的作用来实现取向，每对磁极具有相同的极性并且彼此相对 。 一对电极的横截面向着两对极之间的对称平面展开，而相反极性的另一对或两对磁极在横截面看时，朝向所述对称平面逐渐变细为一点。 这些对的极之间的距离大于扩张的极之间的距离，并且磁极对的对称平面在盘的平面中。 使用该方法和装置，获得具有非磁性金属基底的磁盘，其中施加到基底的流体粘合剂层中的各向异性磁性颗粒在旋转涂覆期间与盘的圆周相切地定向。

    Magnetic discs having a multi-component binder
    7.
    发明授权
    Magnetic discs having a multi-component binder 失效
    具有多组分粘合剂的磁盘

    公开(公告)号：US3955037A

    公开(公告)日：1976-05-04

    申请号：US521459

    申请日：1974-11-06

    申请人： Matthias Marx ,  Job-Werner Hartmann ,  Werner Ostertag

    发明人： Matthias Marx ,  Job-Werner Hartmann ,  Werner Ostertag

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

    CPC分类号： G11B5/7022 ,  G11B5/7023 ,  Y10S428/90 ,  Y10T428/31529 ,  Y10T428/31688

    摘要： A process for the manufacture of improved magnetic discs by applying a thin layer of a fluid dispersion of magnetic pigments and optional non-magnetic pigments in a binder mixture to a non-magnetic rigid base and curing the magnetic layer which has been applied. The binder consists essentially of from 60 to 90 percent by weight of a solid curable polycondensate of 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin having an epoxide equivalent weight of approximately 400 to 5,000, from 5 to 25 percent by weight of a curable allyloxybenzene-formaldehyde condensate of the resol type with free or alcohol-etherified methylol groups and a molecular weight of less thah 1,000, and from 5 to 30 percent by weight of a curable melamine-formaldehyde condensate with more than two alcohol-etherified methylol groups and a molecular weight of less than 3,000, from 10 to 35 percent by weight of the above epoxy resin being replaced by a reaction product of an epoxy group-containing polycondensate of 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin with the N-methylolamide of a copolymerizable olefinically unsaturated carboxylic acid of 3 to 5 carbon atoms. The magnetic layers thus produced adhere firmly to the base, can be readily ground and polished and are particularly resistant to wear when the magnetic discs are in use.

    摘要翻译： 通过将粘合剂混合物中的磁性颜料和任选的非磁性颜料的流体分散体的薄层施加到非磁性刚性基底并固化已经施加的磁性层来制造改进的磁盘的方法。 粘合剂基本上由60至90重量％的2,2-双 - （4-羟基苯基） - 丙烷和表氯醇的固体可固化缩聚物，其环氧当量为约400至5,000，按重量计为5至25％ 具有游离或醇醚化的羟甲基的分解型甲醛型可固化的烯丙氧基苯 - 甲醛缩合物的重量和分子量小于1,000的可固化的烯丙氧基苯 - 甲醛缩合物和5至30重量％的可固化的三聚氰胺 - 甲醛缩合物与多于两个的醇 - 醚化的羟甲基和小于3,000的分子量，10至35重量％的上述环氧树脂被2,2-双（4-羟基苯基） - （4-羟基苯基） - 环氧基的环氧基缩聚物的反应产物代替， 丙烷和表氯醇与3-羟甲基酰胺的可共聚的烯属不饱和羧酸的3至5个碳原子。 由此产生的磁性层牢固地粘附到基底上，可容易地研磨和抛光，并且当使用磁盘时特别耐磨损。