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    Device for magnetically orienting the magnetizable particles or magnetic recording media in a preferred direction
    1.
    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
    4.
    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
    7.
    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。