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    • 61. 发明授权
    • Device for the magnetic orientation of magnetic recording media
    • 磁记录介质的磁性定向装置
    • US4003336A
    • 1977-01-18
    • US604129
    • 1975-08-13
    • Eberhard KoesterPaul DeignerRoland FalkKarl UhlDieter Schaefer
    • Eberhard KoesterPaul DeignerRoland FalkKarl UhlDieter Schaefer
    • G11B5/845B05C11/00
    • G11B5/845
    • 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.
    • 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。
    • 70. 发明公开
    • Magnetic recording medium manufacturing method
    • 磁记录介质的制造方法
    • EP0696028A1
    • 1996-02-07
    • EP95115342.8
    • 1992-08-21
    • FUJI PHOTO FILM CO., LTD.
    • Komatsu, Kazunori, c/o Fuji Photo Film Co., Ltd.Tomaru, Mikio, c/o Fuji Photo Film Co., Ltd.
    • G11B5/845G11B5/704
    • G11B5/845G11B5/738G11B5/842G11B5/848
    • The present invention forms non-magnetic particles in a acicular shape as dispersed in a dispersoid liquid, forms a lower non-magnetic layer by coating the above-mentioned dispersoid liquid on a continually transported non-magnetic supporting base, forms an upper magnetic layer by coating the above-mentioned magnetic coating liquid in dual layers either consecutively or at the same time while the lower layer is still in its wet state, and performs an orientation of the magnetic particles by exposing the particles to a magnetic field while the dual layers as thus formed are still in their undried state. The orientation effect is achieved by making the specific gravity of the non-magnetic particles equal to or greater than that of the magnetic particles. The orientation effect is further enhanced by making the particle size of the non-magnetic particles equal to or less than that of the magnetic particles as measured along the long axis of the magnetic particles.
    • 本发明通过将分散在分散质液体中的非磁性颗粒形成为针状,通过将上述分散液涂布在连续输送的非磁性支撑基体上形成下部非磁性层, 在下层仍处于湿态的同时连续地或同时地将上述磁性涂布液涂布成双层,并且通过将粒子暴露于磁场而执行磁性粒子的取向,而双层作为 这样形成的仍然处于未干燥的状态。 取向效果是通过使非磁性颗粒的比重等于或大于磁性颗粒的比重来实现的。 通过使非磁性颗粒的粒径等于或小于沿着磁性颗粒的长轴测量的磁性颗粒的颗粒尺寸,进一步增强取向效果。