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    Magnetic tape apparatus for controlling a back tension of a magnetic tape running on a rotary drum
    2.
    发明公开
    Magnetic tape apparatus for controlling a back tension of a magnetic tape running on a rotary drum 失效
    Magnetbandgerätzur Steuerung der Gegenspannung eines auf einer Drehtrommel laufenden Magnetbandes

    公开(公告)号：EP0782136A1

    公开(公告)日：1997-07-02

    申请号：EP96309539.3

    申请日：1996-12-27

    申请人： Mitsumi Electric Company Ltd. ,  Hewlett-Packard Company

    发明人： Annen, Ryoichi, c/o Mitsumi Elec. Co., Ltd. ,  Setsumasa, Keiichi, c/o Mitsumi Elec. Co., Ltd. ,  Ode, Naoki, c/o Mitsumi Elec. Co., Ltd. ,  Maule, Hugo William ,  Steven, Peter J.

    IPC分类号： G11B15/43

    CPC分类号： G11B15/43

    摘要： A magnetic tape apparatus includes a head (31) which reproduces data from or records data onto a magnetic tape (62), taken out from a cassette (60), when the tape is running. A supply reel shaft (33) rotates a supply reel to supply the tape from the cassette to the head. A take-up reel shaft (34) rotates a take-up reel to wind the tape from the head around the take-up reel. A back tension applying mechanism (36) has a brake part (53) which presses the supply reel shaft to produce a braking force on the supply reel shaft, the back tension applying mechanism applying a back tension to the tape when the braking force is produced. A pressing force varying mechanism (80) controls a pressing force of the brake part on the supply reel shaft such that the pressing force is maintained at an appropriate level for a type of the cassette.

    摘要翻译： 磁带装置包括当磁带运行时从磁带（60）中取出数据或将数据记录到磁带（62）上的磁头（31）。 供带盘轴（33）使供带盘旋转以将带从盒带提供到头部。 收纸卷轴（34）旋转收纸卷轴，使卷带头绕卷绕卷轴卷起。 背张力施加机构（36）具有制动部（53），该制动部（53）按压供带盘轴以在供带盘轴上产生制动力，当制动力产生时，背张力施加机构向带施加反张力 。 按压力变化机构（80）控制制动部件在供带盘轴上的按压力，使得对于一种类型的盒子，按压力保持在适当的水平。