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102 条记录 (耗时 0.032 秒)

    Magnetic recording and reproduction method
    21.
    发明申请
    Magnetic recording and reproduction method 失效
    磁记录和再现方法

    公开(公告)号：US20050013046A1

    公开(公告)日：2005-01-20

    申请号：US10890090

    申请日：2004-07-14

    申请人： Hitoshi Noguchi ,  Ayako Matsumoto ,  Shinji Saito

    发明人： Hitoshi Noguchi ,  Ayako Matsumoto ,  Shinji Saito

    IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/016 ,  G11B5/58 ,  G11B5/706 ,  G11B5/82

    CPC分类号： G11B5/016 ,  G11B5/012 ,  G11B5/58 ,  G11B5/82 ,  G11B2005/001 ,  G11B2005/0016

    摘要： A magnetic recording and reproduction method comprising recording or reproducing a track of a rotating magnetic disk by means of a magnetic head, wherein the magnetic disk comprises a support and a magnetic layer containing ferromagnetic powder and a binder; the track has a breadth of 2 μm or less; and a frictional force between the magnetic layer and the magnetic head at innermost peripheral area of a recording region of the magnetic disk is 30 mN or less, a frictional force between the magnetic layer and a magnetic head at outermost peripheral area of a recording region of the magnetic disk is 20 mN or less, and a ratio of the frictional force at the innermost peripheral area to the frictional force at the outermost peripheral area is from 1.0 to 4.0.

    摘要翻译： 一种磁记录和再现方法，包括通过磁头记录或再现旋转磁盘的轨道，其中磁盘包括支撑件和包含铁磁粉末和粘合剂的磁性层; 轨道的宽度为2 mum以下; 并且在磁盘的记录区域的最内周区域处的磁性层和磁头之间的摩擦力为30mN以下，磁性层与记录区域的最外周区域的磁头之间的摩擦力 磁盘为20mN以下，最外围区域的摩擦力与最外周面积的摩擦力的比为1.0〜4.0。

    Magnetic disk cartridge
    23.
    发明申请
    Magnetic disk cartridge 审中-公开
    磁盘盒

    公开(公告)号：US20060098342A1

    公开(公告)日：2006-05-11

    申请号：US11221731

    申请日：2005-09-09

    申请人： Ayako Matsumoto ,  Shinji Saito ,  Hitoshi Noguchi

    发明人： Ayako Matsumoto ,  Shinji Saito ,  Hitoshi Noguchi

    IPC分类号： G11B23/03

    CPC分类号： G11B23/0321 ,  G11B23/0308 ,  G11B23/0316

    摘要： A magnetic disk cartridge, which holds therein a magnetic disk with recording density and has a liner composed of polyethylene terephthalate fibers, is provided which achieves a good dust-removal effect by the liner without flawing the magnetic disk and without increasing the rotary torque of the magnetic disk. A magnetic layer of the magnetic disk is formed such that the magnetic layer contains diamond particles which have an average particle size satisfying a relationship “b−0.05≦a≦b+0.1” at 1% to 10% by weight with respect to the ferromagnetic material, where “a” represents the average particle size of the diamond particles in units of μm and “b” represents a thickness of the magnetic layer in units of μm. The fibers of the liner are selected from the fibers whose fiber diameter varies in its length direction.

    摘要翻译： 一种磁盘盒，其具有记录密度的磁盘并具有由聚对苯二甲酸乙二醇酯纤维组成的衬垫，其实现了衬垫的良好的除尘效果，而不会使磁盘发生瑕疵而不会增加旋转扭矩 磁盘。 形成磁盘的磁性层，使得磁性层含有平均粒径满足关系式“b-0.05 <= a <= b + 0.1”的金刚石颗粒，相对于 铁磁材料，其中“a”表示以单位为单位的金刚石颗粒的平均粒度，“b”表示磁性层以母体为单位的厚度。 衬垫的纤维选自其纤维直径在其长度方向上变化的纤维。

    Recording/reproducing method of magnetic disc
    24.
    发明申请
    Recording/reproducing method of magnetic disc 审中-公开
    磁盘的记录/再现方法

    公开(公告)号：US20050174674A1

    公开(公告)日：2005-08-11

    申请号：US11050767

    申请日：2005-02-07

    申请人： Shinji Saito ,  Hitoshi Noguchi

    发明人： Shinji Saito ,  Hitoshi Noguchi

    IPC分类号： G11B5/82 ,  G11B5/012 ,  G11B5/02 ,  G11B5/39 ,  G11B5/706 ,  G11B5/738 ,  G11B19/28

    CPC分类号： G11B5/39 ,  G11B5/02 ,  G11B5/70678 ,  G11B5/73 ,  G11B19/28

    摘要： A method comprising recording or reproducing a magnetic disc with a recording head or a reproducing head, the magnetic disc having a diameter of from 1.91 to 3.81 cm and comprising, in this order, a flexible support, a substantially nonmagnetic lower layer and a magnetic layer containing hexagonal ferrite magnetic powder and a binder, wherein relative speeds in all recording area of the magnetic disc are within a range of from 1.0 to 8.0 m/s when the recording or reproducing is conducted.

    摘要翻译： 一种包括用记录头或再现头记录或再现磁盘的方法，该磁盘的直径为1.91至3.81cm，并且依次包括柔性支撑件，基本上非磁性的下层和磁性层 包含六角铁氧体磁粉和粘合剂，其中当进行记录或再现时，磁盘的所有记录区域中的相对速度在1.0至8.0m / s的范围内。

    Magnetic recording and reproducing method and magnetic recording medium for use in the method
    25.
    发明授权
    Magnetic recording and reproducing method and magnetic recording medium for use in the method 有权
    用于该方法的磁记录和再现方法和磁记录介质

    公开(公告)号：US06703106B2

    公开(公告)日：2004-03-09

    申请号：US10126616

    申请日：2002-04-22

    申请人： Hitoshi Noguchi ,  Takeshi Harasawa ,  Shinji Saito

    发明人： Hitoshi Noguchi ,  Takeshi Harasawa ,  Shinji Saito

    IPC分类号： G11B502

    CPC分类号： G11B5/7085 ,  G11B5/00 ,  G11B5/70605 ,  G11B5/70678 ,  G11B2005/0016 ,  Y10T428/115 ,  Y10T428/25

    摘要： A magnetic recording and reproducing method comprising recording and reproducing a signal with a magnetic head in a track width (A) of less than 5 &mgr;m on a magnetic recording medium comprising a support having provided thereon a magnetic layer containing at least a ferromagnetic powder, an abrasive and a binder, wherein the average longer size (B) of the abrasive particle(s) which are present on the magnetic layer surface is ⅓ or less of the track width (A).

    摘要翻译： 一种磁记录和再现方法，包括在磁记录介质上记录和再现具有小于5μm的磁道宽度（A）的磁头的信号，所述磁记录介质包括其上设置有至少含有铁磁性粉末的磁性层的支撑体， 研磨剂和粘合剂，其中存在于磁性层表面上的磨料颗粒的平均较长尺寸（B）为轨道宽度（A）的1/3或更小。

    Disc-like magnetic recording medium
    26.
    发明授权
    Disc-like magnetic recording medium 失效
    盘状磁记录介质

    公开(公告)号：US6037030A

    公开(公告)日：2000-03-14

    申请号：US46591

    申请日：1998-03-24

    申请人： Hitoshi Noguchi ,  Junichi Nakamigawa ,  Shinji Saito

    发明人： Hitoshi Noguchi ,  Junichi Nakamigawa ,  Shinji Saito

    IPC分类号： G11B5/706 ,  G11B5/70 ,  G11B5/714 ,  G11B5/738 ,  G11B5/82

    CPC分类号： G11B5/70 ,  G11B5/714 ,  Y10T428/256 ,  Y10T428/265

    摘要： A disc-like magnetic recording medium is disclosed, which comprises a support having thereon a magnetic layer comprising a ferromagnetic powder and a binder as main components, wherein the ferromagnetic powder has an average long axis length of from 0.01 to 0.18 .mu.m, a crystallite size of from 50 to 180 .ANG., an acicular ratio of from 2 to 9, the magnetic layer has the coercive force Hc of from 1,700 to 3,000 Oe, the in-plane orientation ratio of 0.85 or more, and the squareness ratio in the vertical direction to the surface of the magnetic layer of 0.30 or less.

    摘要翻译： 公开了一种盘状磁记录介质，其包括其上具有包含铁磁粉末和粘合剂作为主要成分的磁性层的载体，其中铁磁粉末的平均长轴长度为0.01至0.18μm，微晶 尺寸为50〜180安培，针状比为2〜9，磁性层的矫顽力Hc为1700〜3000Oe，面内取向率为0.85以上，垂直方向的垂直度 磁性层表面的方向为0.30以下。

    Disc type magnetic recording medium
    27.
    发明授权
    Disc type magnetic recording medium 失效
    盘式磁记录介质

    公开(公告)号：US5935674A

    公开(公告)日：1999-08-10

    申请号：US886468

    申请日：1997-07-01

    申请人： Shinji Saito ,  Hitoshi Noguchi ,  Yasushi Endo

    发明人： Shinji Saito ,  Hitoshi Noguchi ,  Yasushi Endo

    IPC分类号： G11B5/70 ,  G11B5/73 ,  G11B5/82

    CPC分类号： G11B5/70 ,  G11B5/7305 ,  Y10S428/90 ,  Y10T428/24355

    摘要： The present invention provides a disc magnetic recording medium which provides remarkable improvements in electromagnetic characteristics, particularly high density recording properties, and exhibits excellent magnetic properties with various sizes. A disc type magnetic recording medium is disclosed, comprising a substantially non-magnetic layer and a magnetic layer provided on a non-magnetic support in this order, said magnetic layer comprising a ferromagnetic metal fine powder or ferromagnetic hexagonal ferrite fine powder dispersed in a binder, wherein said non-magnetic support is an aramide or polyethylene naphthalate having a central plane average surface roughness SRa of not more than 10 mm and there is the following relationship between the thickness d (.mu.m) of the non-magnetic support and the outermost diameter D (mm) of the recording area:1.25.ltoreq.D/d.ltoreq.2.50 (when the non-magnetic support is an aramide)1.00.ltoreq.D/d.ltoreq.2.00 (when the non-magnetic support is a polyethylene naphthalate)

    摘要翻译： 本发明提供一种盘式磁记录介质，其提供了电磁特性，特别是高密度记录性能方面的显着改进，并表现出优异的各种尺寸的磁特性。 公开了一种盘式磁记录介质，其包括基本上非磁性层和设置在非磁性载体上的磁性层，所述磁性层包含分散在粘合剂中的铁磁性金属细粉末或铁磁六方铁氧体细粉末 其中所述非磁性载体是中心平面平均表面粗糙度SRa不超过10mm的芳族聚酰胺或聚萘二甲酸乙二醇酯，并且非磁性载体的厚度d（μm）与最外层 记录区域的直径D（mm）：1.25

    Magnetic recording medium
    28.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5547772A

    公开(公告)日：1996-08-20

    申请号：US416331

    申请日：1995-04-04

    申请人： Shinji Saito ,  Hiroshi Ogawa ,  Takeshi Kakuta ,  Hitoshi Noguchi

    发明人： Shinji Saito ,  Hiroshi Ogawa ,  Takeshi Kakuta ,  Hitoshi Noguchi

    IPC分类号： G11B5/706 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/714 ,  G11B5/716 ,  G11B5/66 ,  B32B3/10 ,  B32B5/16

    CPC分类号： G11B5/716 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

    摘要： The present invention is directed to a magnetic recording medium comprising a non-magnetic support having provided thereon a plurality of magnetic layers composed of a lower magnetic layer comprising a ferromagnetic powder and a binder, and an upper magnetic layer comprising a ferromagnetic powder being provided on the lower magnetic layer, wherein the ferromagnetic powder contained in the upper magnetic layer has a length of major axis not longer than 0.30 .mu.m and a crystallite size not larger than 400 .ANG., the upper magnetic layer has a dry thickness of not more than 1.20 .mu.m, and the surface of the upper magnetic layer has a center-line average surface roughness (Ra) not more than 0.015 .mu.m.

    摘要翻译： 本发明涉及一种磁记录介质，其包括非磁性载体，其上设置有由包含铁磁性粉末和粘合剂的下部磁性层构成的多个磁性层，以及包含铁磁性粉末的上部磁性层， 所述下磁性层，其中所述上磁性层中所含的铁磁粉末的长轴长度不大于0.30μm，微晶尺寸不大于400，所述上磁性层的干厚度不大于1.20 上磁性层的表面的中心线平均表面粗糙度（Ra）不大于0.015μm。

    Process for producing magnetic disk
    30.
    发明授权
    Process for producing magnetic disk 失效

    公开(公告)号：US06458432B1

    公开(公告)日：2002-10-01

    申请号：US09995274

    申请日：2001-11-26

    申请人： Hitoshi Noguchi ,  Junichi Nakamikawa ,  Shinji Saito

    发明人： Hitoshi Noguchi ,  Junichi Nakamikawa ,  Shinji Saito

    IPC分类号： H01F100

    CPC分类号： G11B5/845 ,  G11B5/70678 ,  Y10S428/90

    摘要： A process for producing a magnetic disk having a randomly oriented magnetic powder, comprises: applying a magnetic coating solution containing at least a magnetic powder to a web that is being continuously conveyed, so as to prepare a magnetic layer; applying a first external magnetic field to the magnetic layer while the magnetic layer is wet; and applying a second external magnetic field to the magnetic layer while the magnetic layer is wet, wherein: the first external magnetic field is applied with a set of a first pair of same-pole-opposed magnets with the web interposed therebetween and a second pair of same-pole-opposed magnets with the web interposed therebetween; the first and second pairs are provided on the same plane of the web and on two equal sides of an isosceles triangle so that a perpendicular line dropped from a base of the isosceles triangle forms a line perpendicular to a conveying direction of the web; and the second external magnetic field is an alternating magnetic field, and is applied with a pair of magnets with the web interposed therebetween; the pair of magnets being provided on the same plane of the web, and in a direction perpendicular to the conveying direction of the web.