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    Device for the non-destructive measurement of the remanent flux density of magnetic recording media, especially magnetic discs
    1.
    发明授权
    Device for the non-destructive measurement of the remanent flux density of magnetic recording media, especially magnetic discs 失效
    用于无损测量磁记录介质，特别是磁盘的剩磁通密度的装置

    公开(公告)号：US3984763A

    公开(公告)日：1976-10-05

    申请号：US618041

    申请日：1975-09-30

    申请人： Eberhard Koester ,  Paul Deigner ,  Roland Falk ,  Georg Huber ,  Karl Uhl

    发明人： Eberhard Koester ,  Paul Deigner ,  Roland Falk ,  Georg Huber ,  Karl Uhl

    IPC分类号： G01R33/12 ,  G11B5/00 ,  G11B5/84

    CPC分类号： G01R33/1207

    摘要： The invention concerns a device for the non-destructive measurement of the remanent flux density of magnetic recording media, by recording a specific signal and reproducing the recorded signal by means of two pairs of magnetic recording and playback heads arranged opposite one another and perpendicular to the plane of the recording medium, the ratio of the distance between the individual magnetic heads of each pair of heads to the wavelength of the recorded signal being within a specific range, and the said distance being such that a magnetic recording medium is movable symmetrically between the pair of heads, a common measuring unit being associated with the playback pair. Further features of the device relate to the design of the magnetic recording and playback heads, the measuring unit and the rate at which the particular magnetic recording medium being tested moves between the pairs of heads.

    摘要翻译： 本发明涉及用于通过记录特定信号和通过两对磁记录和重放头相互重叠并垂直于磁记录介质的磁记录和重放头对磁记录介质的剩余通量密度进行非破坏性测量的装置。 记录介质的平面，每对磁头的各个磁头与记录信号的波长之间的距离的比例在特定范围内，并且所述距离使得磁记录介质在 一对头，与播放对相关联的公共测量单元。 该装置的其他特征涉及磁记录和重放头，测量单元的设计以及被测试的特定磁记录介质在两对磁头之间移动的速率。

    Device for magnetically orienting the magnetizable particles or magnetic recording media in a preferred direction
    4.
    发明授权
    Device for magnetically orienting the magnetizable particles or magnetic recording media in a preferred direction 失效
    用于在优选方向上磁化定向可磁化颗粒或磁记录介质的装置

    公开(公告)号：US4382244A

    公开(公告)日：1983-05-03

    申请号：US242560

    申请日：1981-03-11

    申请人： Eberhard Koester ,  Paul Deigner ,  Dieter Schaefer ,  Karl Uhl ,  Roland Falk

    发明人： Eberhard Koester ,  Paul Deigner ,  Dieter Schaefer ,  Karl Uhl ,  Roland Falk

    IPC分类号： G11B5/845 ,  H01F7/20

    CPC分类号： G11B5/845

    摘要： A device for magnetically orienting the magnetizable particles of magnetic recording media in a preferred direction, which media are obtained by applying a coating of anisotropically magnetic particles finely dispersed in a solution of an organic binder system and conventional additives to a non-magnetic base, and subsequently solidifying the coating, by the action, on the still fluid coating, of the magnetic fields produced by two E-shaped electromagnets arranged symmetrically with respect to, and in mirror-image relationship to, the plane of the said coating.

    摘要翻译： 一种用于沿优选方向磁性取向磁记录介质的可磁化颗粒的装置，所述介质通过将微分散在有机粘合剂体系和常规添加剂的溶液中的各向异性磁性颗粒的涂层施加到非磁性基底而获得，以及 随后通过对所述涂层的平面相对于所述涂层的平面和镜像关系对称地布置的两个E形电磁体产生的磁场，在静止流体涂层上固化涂层。

    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：US4003336A

    公开(公告)日：1977-01-18

    申请号：US604129

    申请日：1975-08-13

    申请人： Eberhard Koester ,  Paul Deigner ,  Roland Falk ,  Karl Uhl ,  Dieter Schaefer

    发明人： Eberhard Koester ,  Paul Deigner ,  Roland Falk ,  Karl Uhl ,  Dieter Schaefer

    IPC分类号： G11B5/845 ,  B05C11/00

    CPC分类号： G11B5/845

    摘要： A device for manufacturing magnetic recording media in which the magnetic particles in the recording layer are oriented in a preferred direction, the fluid coating applied to the base being subjected to the action of a magnetic field produced in the air gaps between the spaced apart poles of two magnetic circuits, one on each side of the coated face, arranged symmetrically with respect to the plane of the coated base, the edges of the poles adjacent to the coated base terminating in screening elements shaped in such a way that the distance between the surfaces of the screening elements facing the coated base and the coated base itself increases as the screening elements extend away from the edges of the poles. A high degree of magnetic anisotropy in the recording layer can also be obtained when the magnetic circuits are at a relatively large distance from the still fluid magnetic coating.

    摘要翻译： 一种用于制造磁记录介质的装置，其中记录层中的磁性颗粒沿优选方向取向，施加到基底的流体涂层受到在间隔开的极间的空隙中产生的磁场的作用 相对于被涂覆的基体的平面对称地布置有两个磁路，一个在涂覆面的每一侧上，与被涂覆的基底相邻的极点的边缘终止于以这样的方式成形的屏蔽元件： 面向涂覆的基底的筛选元件和涂覆的基底本身随着筛分元件远离极的边缘而增加。 当磁路距离静止流体磁性涂层相对较大的距离时，也可以获得记录层中的高度的磁各向异性。

    Magnetic recording discs
    8.
    发明授权
    Magnetic recording discs 失效
    磁记录盘

    公开(公告)号：US4046932A

    公开(公告)日：1977-09-06

    申请号：US656182

    申请日：1976-02-09

    申请人： Hans-Joerg Hartmann ,  Roland Falk ,  Peter Gawlik ,  Werner Balz ,  Karl Uhl ,  Dieter Schaefer ,  Herbert Motz

    发明人： Hans-Joerg Hartmann ,  Roland Falk ,  Peter Gawlik ,  Werner Balz ,  Karl Uhl ,  Dieter Schaefer ,  Herbert Motz

    IPC分类号： G11B5/702 ,  H01F10/02

    CPC分类号： G11B5/7023 ,  Y10S428/90 ,  Y10T428/254 ,  Y10T428/257 ,  Y10T428/269 ,  Y10T428/31529

    摘要： The invention relates to a process for the manufacture of improved magnetic discs by applying a thin layer of a liquid dispersion of magnetic pigments and optionally further, non-magnetic, pigments in a binder mixture to a non-magnetic rigid base, and curing the magnetic coating which has been applied. The binder used is a mixture of polycondensates comprising 60 to 70% by weight of a solid curable polycondensate of 2,2-bis(4-hydroxyphenyl)-propane and epichlorohydrin having an epoxy equivalent weight from about 400 to 2,500 and a melting point from about 50.degree. to 150.degree. C, 10 to 30% by weight of a curable allyloxybenzene-formaldehyde condensate of the resol type with free methylol groups or with methylol groups etherified with a lower alcohol, and having a molecular weight of less than 1,000, and 10 to 30% by weight of a curable melamine-formaldehyde condensate with more than two methylol groups etherified with n-butanol or iso-butanol, and having a molecular weight of less than 2,500. A magnetic dispersion using such a binder allows the application of a firmly adhering magnetic coating, even in thicknesses of less than 4 .mu., to aluminum discs or pre-coated aluminum discs, and the magnetic coating produced has high resistance to mechanical wear.

    摘要翻译： 本发明涉及通过将粘性混合物中的磁性颜料和任选的另外的非磁性颜料的液体分散体的薄层施加到非磁性刚性基底上来制造改进的磁盘的方法，以及固化磁性 已涂覆的涂层。 使用的粘合剂是包含60至70重量％的环氧当量为约400至2,500的2,2-双（4-羟基苯基） - 丙烷和表氯醇的固体可固化缩聚物的缩聚物混合物，熔点为 约50〜150℃，10〜30重量％的甲阶型固化性烯丙氧基苯 - 甲醛缩合物与游离羟甲基或与低级醇醚化的羟甲基，分子量小于1,000，以及 10至30重量％的可固化的三聚氰胺 - 甲醛缩合物，其具有用正丁醇或异丁醇醚化的两个以上羟甲基，分子量小于2500。 使用这种粘合剂的磁性分散体允许对铝盘或预涂铝盘施加甚至厚度小于4微米的牢固粘附的磁性涂层，并且所产生的磁性涂层具有高的耐机械磨损性。

    Device for the magnetic orientation of magnetic recording media
    9.
    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。

    Preparation of magnetic recording media
    10.
    发明授权
    Preparation of magnetic recording media 失效
    磁记录介质的制备

    公开(公告)号：US4597990A

    公开(公告)日：1986-07-01

    申请号：US769979

    申请日：1985-08-27

    申请人： Hermann Roller ,  Joachim Hack ,  Uwe Woweries ,  August Lehner ,  Werner Grau ,  Peter Nagel ,  Roland Falk

    发明人： Hermann Roller ,  Joachim Hack ,  Uwe Woweries ,  August Lehner ,  Werner Grau ,  Peter Nagel ,  Roland Falk

    IPC分类号： C08J7/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  C10M105/56 ,  C10N40/18 ,  C10N70/00 ,  G11B5/702 ,  G11B5/842

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

    摘要： A process for the preparation of a magnetic recording medium by dispersing pulverulent magnetic material in a binder mixture which is dissolved in an organic solvent and essentially consists of an elastomeric polyurethane and a high molecular weight hydroxyl-containing polymer, with addition of dispersing assistants and conventional additives, applying a layer of the dispersion, to which a diisocyanate and/or polyisocyanate has first been added, to a base material and the solidifying the layer and crosslinking the binder matrix, wherein the diisocyanate and/or polyisocyanate is added to the dispersion and, before applying the dispersion to the base, from 15 to 55% of the NCO groups present react with the hydroxyl-containing polymer of the binder mixture.

    摘要翻译： 一种通过将粉状磁性材料分散在溶解在有机溶剂中并且基本上由弹性体聚氨酯和高分子量含羟基聚合物组成的粘合剂混合物中制备磁记录介质的方法，加入分散助剂和常规的 添加剂，将首先加入二异氰酸酯和/或多异氰酸酯的分散体层分别加入到基材中，并固化该层并交联粘合剂基质，其中将二异氰酸酯和/或多异氰酸酯加入到分散体中， 在将分散体施加到基材之前，存在15〜55％的NCO基团与粘合剂混合物的含羟基聚合物反应。