利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

37 条记录 (耗时 0.044 秒)

    Magnetic recording disc comprising a non-magnetic underlayer and a magnetic layer comprising ferromagnetic particles and a binder
    25.
    发明授权
    Magnetic recording disc comprising a non-magnetic underlayer and a magnetic layer comprising ferromagnetic particles and a binder 失效
    磁记录盘包括非磁性底层和包含铁磁颗粒和粘合剂的磁性层

    公开(公告)号：US5384175A

    公开(公告)日：1995-01-24

    申请号：US959795

    申请日：1992-10-13

    申请人： Masaya Kojima ,  Kazuhiro Niitsuma ,  Satoru Hayakawa ,  Toshio Kawamata ,  Yasushi Endo

    发明人： Masaya Kojima ,  Kazuhiro Niitsuma ,  Satoru Hayakawa ,  Toshio Kawamata ,  Yasushi Endo

    IPC分类号： G11B5/706 ,  G11B5/738 ,  G11B23/00

    CPC分类号： G11B5/70605 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/30

    摘要： A novel magnetic recording disc is provided comprising, a nonmagnetic support having thereon a nonmagnetic layer comprising nonmagnetic particles and a binder resin, and a magnetic layer comprising ferromagnetic particles and a binder resin, in this order. The nonmagnetic particles in the nonmagnetic layer are partially or entirely electrically conductive particles, the thickness of the magnetic layer is in the range of 0.5 .mu.m or less, and the orientation ratio of the ferromagnetic particles in the magnetic layer is 0.85 or more.A novel process for preparing the magnetic recording disc is provided. Further, a novel process for recording and reproduction of a signal having a shortest recordable wavelength of 1.5 .mu.m or less is provided, which utilizes the magnetic recording disc in conjunction with a magnetic head having a gap length (.delta.) of 0.50 .mu.m or less.

    摘要翻译： 提供了一种新颖的磁记录盘，其包括：非磁性载体，其上具有包含非磁性颗粒和粘合剂树脂的非磁性层，以及包含铁磁颗粒和粘合剂树脂的磁性层。 非磁性层中的非磁性颗粒是部分或全部是导电颗粒，磁性层的厚度在0.5μm或更小的范围内，并且磁性层中铁磁性颗粒的取向比为0.85以上。 提供了一种制备磁记录盘的新颖方法。 另外，提供了一种用于记录和再现具有最小可记录波长为1.5μm或更小的信号的新颖方法，其利用磁记录盘与间隙长度（delta）为0.50μm的磁头或 减。

    Magnetic recording medium comprising an underlayer of non magnetic powder and binder resin and a magnetic layer with a specified Young's modulus
    26.
    发明授权
    Magnetic recording medium comprising an underlayer of non magnetic powder and binder resin and a magnetic layer with a specified Young's modulus 失效
    磁记录介质包括非磁性粉末和粘合剂树脂的底层和具有特定杨氏模量的磁性层

    公开(公告)号：US5358777A

    公开(公告)日：1994-10-25

    申请号：US19257

    申请日：1993-02-18

    申请人： Masaya Kojima ,  Satoru Hayakawa ,  Toshio Kawamata

    发明人： Masaya Kojima ,  Satoru Hayakawa ,  Toshio Kawamata

    IPC分类号： G11B5/82 ,  C09D5/23 ,  C09D7/12 ,  G11B5/70 ,  G11B5/73 ,  G11B5/733 ,  G11B5/738 ,  G11B5/842 ,  G11B5/00

    CPC分类号： G11B5/738 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/265

    摘要： A magnetic recording medium comprising (A) a non-magnetic support; (B) a non-magnetic layer comprising mainly a non-magnetic powder and a binder resin; and (C) a magnetic layer comprising mainly a ferromagnetic powder and a binder resin, wherein said non-magnetic layer is coated on said non-magnetic support; and said magnetic layer is coated over the previously formed non-magnetic layer while the previously formed non-magnetic layer is still wet; the thickness of the magnetic layer is 0.6 .mu.m or less; the Young's Modulus of the magnetic layer is from 50% to 95% of the Young's Modulus of the non-magnetic layer, and the glass transition temperature of the magnetic layer is lower than that of the non-magnetic layer. The magnetic recording medium has good electromagnetic characteristics and excellent running stability and running durability. It is suitable as a disc medium for high-density recording at a shortest recording wavelength of 1.5 .mu.m or less, displaying excellent overwriting characteristic in high-density recording. The running reliability of the magnetic recording medium is good.

    摘要翻译： 一种磁记录介质，包括（A）非磁性载体; （B）主要包含非磁性粉末和粘合剂树脂的非磁性层; 和（C）主要包含铁磁性粉末和粘合剂树脂的磁性层，其中所述非磁性层涂覆在所述非磁性载体上; 并且所述磁性层涂覆在先前形成的非磁性层上，同时先前形成的非磁性层仍然是湿的; 磁性层的厚度为0.6μm以下; 磁性层的杨氏模量是非磁性层的杨氏模量的50％至95％，并且磁性层的玻璃化转变温度低于非磁性层的玻璃化转变温度。 磁记录介质具有良好的电磁特性和良好的运行稳定性和运行耐久性。 适合于在1.5μm以下的最短记录波长下进行高密度记录的盘式介质，在高密度记录中显示优异的重写特性。 磁记录介质的运行可靠性好。

    Magnetic tape processing method and magnetic tape processing apparatus having an optical system
    28.
    发明授权
    Magnetic tape processing method and magnetic tape processing apparatus having an optical system 失效
    磁带处理方法和具有光学系统的磁带处理装置

    公开(公告)号：US06429411B1

    公开(公告)日：2002-08-06

    申请号：US09456811

    申请日：1999-12-08

    申请人： Osamu Iwasaki ,  Satoru Hayakawa ,  Hiroo Inaba ,  Takeshi Nagata

    发明人： Osamu Iwasaki ,  Satoru Hayakawa ,  Hiroo Inaba ,  Takeshi Nagata

    IPC分类号： G02B704

    CPC分类号： G11B5/84 ,  B23K26/066 ,  B23K26/067 ,  B23K26/082 ,  B23K26/0846 ,  B23K2101/16 ,  G11B5/78 ,  G11B23/113

    摘要： The magnetic tape processing method and apparatus allow at least one of a laser beam or laser beams in a visible region and a laser beam or laser beams in an ultraviolet region to be incident on a backing layer of a magnetic tape while transporting the magnetic tape in a lengthwise direction of the magnetic tape and process the backing layer by means of the laser beam or laser beams to form recesses on the backing layer. The processed magnetic tape is composed of a base layer, a magnetic layer formed on one surface of the base layer and the backing layer formed on another surface of the base layer and having recesses which are formed by processing the backing layer by means of the laser beam or laser beams. The method and apparatus can efficiently manufacture the magnetic tape having excellent characteristics such that the occurrence of the slip of the magnetic tape is not caused on a capstan roller and the like, even if the transportation speed of the tape is increased in a magnetic tape manufacturing apparatus, and furthermore a size of cupping of the magnetic tape is small.

    摘要翻译： 磁带处理方法和装置允许可视区域中的激光束或激光束中的至少一个以及紫外线区域中的激光束或激光束入射到磁带的背衬层上，同时将磁带传送到 磁带的长度方向，并通过激光束或激光束处理背衬层，以在背衬层上形成凹陷。 处理后的磁带由基底层，形成在基底层的一个表面上的磁性层和形成在基底层的另一个表面上的背衬层组成，具有通过激光加工背衬层形成的凹部 光束或激光束。 该方法和装置可以有效地制造具有优异特性的磁带，即使在磁带制造中磁带的传送速度增加也不会在绞盘辊等上引起磁带滑动的发生 装置，此外，磁带的拔罐尺寸很小。