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    Magnetic tape, method of cleaning the same, and apparatus for forming and cleaning optical servo tracks
    1.
    发明申请
    Magnetic tape, method of cleaning the same, and apparatus for forming and cleaning optical servo tracks 审中-公开
    磁带，其清洁方法以及用于形成和清洁光学伺服磁道的装置

    公开(公告)号：US20100319728A1

    公开(公告)日：2010-12-23

    申请号：US12862504

    申请日：2010-08-24

    申请人： Hiroyuki OTA ,  Haruhiko Fujisawa ,  Naoki Mukai ,  Satoru Fukiage ,  Kenji Sano ,  Shigeo Fujitani

    发明人： Hiroyuki OTA ,  Haruhiko Fujisawa ,  Naoki Mukai ,  Satoru Fukiage ,  Kenji Sano ,  Shigeo Fujitani

    IPC分类号： B08B7/00

    CPC分类号： G11B5/735 ,  G11B5/584 ,  G11B5/78 ,  G11B23/502

    摘要： A magnetic tape which comprises a nonmagnetic support, a magnetic layer which is formed on one surface of the nonmagnetic support, and a backcoat layer which comprises a binder and nonmagnetic powder containing carbon black as a component and which is formed on the other surface of the nonmagnetic support, having pits for optical servo formed thereon, characterized in that the average of the reflectance on the flat portion of the backcoat layer is 8.5% or higher, and that the maximum rate of fluctuation of the reflectance on the flat portion, depending on a position of the magnetic tape: [Maximum of absolute value of(Reflectance−Average reflectance)]×100/(Average reflectance) is 10% or lower. This magnetic tape is high in the initial S/N of the servo signal, and also high in the S/N of the servo signal found after the magnetic tape is run twice.

    摘要翻译： 一种磁带，其包括非磁性载体，形成在非磁性载体的一个表面上的磁性层，以及背涂层，其包含粘合剂和含有炭黑作为组分的非磁性粉末，并形成在所述非磁性载体的另一个表面上 非磁性支撑件，其上形成有用于光学伺服的凹坑，其特征在于，背涂层的平坦部分上的反射率的平均值为8.5％以上，平坦部分的反射率的最大波动率取决于 磁带的位置：[反射率平均反射率的绝对值的最大值]×100 /（平均反射率）为10％以下。 该磁带在伺服信号的初始S / N高，并且在磁带运行两次之后发现的伺服信号的S / N也较高。

    Magnetic tape, its cleaning method, and optical servotrack forming/cleaning apparatus
    2.
    发明授权
    Magnetic tape, its cleaning method, and optical servotrack forming/cleaning apparatus 有权
    磁带，其清洁方法和光学伺服轨道成形/清洁装置

    公开(公告)号：US07803471B1

    公开(公告)日：2010-09-28

    申请号：US10343432

    申请日：2001-12-28

    申请人： Hiroyuki Ota ,  Haruhiko Fujisawa ,  Naoki Mukai ,  Satoru Fukiage ,  Kenji Sano ,  Shigeo Fujitani

    发明人： Hiroyuki Ota ,  Haruhiko Fujisawa ,  Naoki Mukai ,  Satoru Fukiage ,  Kenji Sano ,  Shigeo Fujitani

    IPC分类号： G11B5/706

    CPC分类号： G11B5/735 ,  G11B5/584 ,  G11B5/78 ,  G11B23/502

    摘要： A magnetic tape which comprises a nonmagnetic support, a magnetic layer which is formed on one surface of the nonmagnetic support, and a backcoat layer which comprises a binder and nonmagnetic powder containing carbon black as a component and which is formed on the other surface of the nonmagnetic support, having pits for optical servo formed thereon, characterized in that the average of the reflectance on the flat portion of the backcoat layer is 8.5% or higher, and that the maximum rate of fluctuation of the reflectance on the flat portion, depending on a position of the magnetic tape: [Maximum of absolute value of (Reflectance−Average reflectance)]×100/(Average reflectance) is 10% or lower. This magnetic tape is high in the initial S/N of the servo signal, and also high in the S/N of the servo signal found after the magnetic tape is run twice.

    摘要翻译： 一种磁带，其包括非磁性载体，形成在非磁性载体的一个表面上的磁性层，以及背涂层，其包含粘合剂和含有炭黑作为组分的非磁性粉末，并形成在所述非磁性载体的另一个表面上 非磁性支撑件，其上形成有用于光学伺服的凹坑，其特征在于，背涂层的平坦部分上的反射率的平均值为8.5％以上，平坦部分的反射率的最大波动率取决于 磁带的位置：[反射率平均反射率的绝对值的最大值]×100 /（平均反射率）为10％以下。 该磁带在伺服信号的初始S / N高，并且在磁带运行两次之后发现的伺服信号的S / N也较高。