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1. 发明申请

US20050013046A1 Magnetic recording and reproduction method 失效
标题翻译：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。

2. 发明申请

US20060098342A1 Magnetic disk cartridge 审中-公开
标题翻译：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。

3. 发明授权

US07092210B2 Magnetic recording and reproduction method 失效
标题翻译：磁记录和再现方法
公开(公告)号：US07092210B2
公开(公告)日：2006-08-15
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： G11B5/82
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。

4. 发明申请

US20060024533A1 Magnetic recording medium 有权
公开(公告)号：US20060024533A1
公开(公告)日：2006-02-02
申请号：US11237973
申请日：2005-09-29
申请人： Shinji Saito , Hitoshi Noguchi , Nobuo Yamazaki
发明人： Shinji Saito , Hitoshi Noguchi , Nobuo Yamazaki
IPC分类号： G11B5/708
CPC分类号： G11B5/70678 , G11B5/70 , G11B5/714
摘要： Provided is a magnetic recording medium exhibiting good electromagnetic characteristics in high-density recording The magnetic recording medium employed for magnetically recording signals with a track width equal to or less than 2.0 μm and reproducing the magnetically recorded signals, wherein said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder or comprises a nonmagnetic layer comprise a nonmagnetic powder and a binder and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on a nonmagnetic support. Said magnetic layer has a thickness equal to or less than 0.2 μm, and said hexagonal ferrite ferromagnetic powder has an average plate diameter being 1/30 or less of the magnetically recorded track width as well as ½ or less of the thickness of the magnetic layer.

5. 发明授权

US06855394B2 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06855394B2
公开(公告)日：2005-02-15
申请号：US10178764
申请日：2002-06-25
申请人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
发明人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
IPC分类号： G11B5/70 , G11B5/706 , G11B5/708
CPC分类号： G11B5/706 , G11B5/7085 , Y10T428/24355 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium is disclosed, comprising a support having provided thereon a substantially nonmagnetic lower layer by coating a lower layer coating solution comprising a nonmagnetic powder dispersed in a binder and drying, and a layer having a thickness of from 0.01 to 0.15 μm by coating a magnetic layer coating solution comprising a ferromagnetic metal powder or a hexagonal ferrite powder dispersed in a binder, wherein the magnetic layer contains diamond particles having an average particle size of from 1/5 to 2 times the thickness of the magnetic layer in an amount of from 0.1 to 5.0 mass % based on the ferromagnetic metal powder.
摘要翻译：公开了一种磁记录介质，其包括通过涂布包含分散在粘合剂中的非磁性粉末的下层涂布溶液和干燥而在其上设置有基本上非磁性的下层的载体，以及通过涂布具有0.01至0.15μm厚度的层包含分散在粘合剂中的铁磁性金属粉末或六方铁氧体粉末的磁性层涂布液，其中所述磁性层含有平均粒度为磁性层厚度的1/5至2倍的金刚石颗粒，其量为基于强磁性金属粉末为0.1〜5.0质量％。

6. 发明授权

US06780503B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06780503B2
公开(公告)日：2004-08-24
申请号：US10281947
申请日：2002-10-29
申请人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
发明人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
IPC分类号： G11B5702
CPC分类号： G11B5/7021 , G11B5/7023 , G11B5/70678 , G11B5/7085 , G11B5/714 , Y10T428/256 , Y10T428/31609
摘要： A magnetic recording medium comprising: a nonmagnetic support; and at least one magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder, wherein the magnetic layer comprises diamond particles having an average particle size of 0.03 to 0.5 &mgr;m in a ratio of 0.1 to 5% by weight to the ferromagnetic hexagonal ferrite powder, the ferrite hexagonal ferrite powder has an average tabular diameter of 5 to 40 nm, and the binder is at least one of: (i) a binder comprising from 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium, and (ii) a binder comprising from 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group.
摘要翻译：一种磁记录介质，包括：非磁性载体; 以及包含铁磁性六角铁氧体粉末和粘合剂的至少一个磁性层，其中所述磁性层包含平均粒度为0.03-0.5μm，相对于铁磁性六角铁氧体粉末为0.1-5wt％的金刚石颗粒，所述铁氧体六角铁氧体粉末的平均片状直径为5〜40nm，所述粘合剂为以下中的至少一种：（i）包含0.2〜0.7meq / g的至少一种选自-SO 3 M， OSO3M，-PO（OM）2，-OPO（OM）2和-COOM，其中M表示氢原子，碱金属或铵，和（ii）包含0.5-5meq / g至少一种选自-CONR1R2，-NR1R2和-N + R1R2R3的极性基团，其中R1，R2和R3各自独立地表示氢原子或烷基。

7. 发明授权

US06677036B2 Method for producing magnetic recording medium and magnetic recording medium 有权
标题翻译：磁记录介质和磁记录介质的制造方法
公开(公告)号：US06677036B2
公开(公告)日：2004-01-13
申请号：US10281996
申请日：2002-10-29
申请人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
发明人： Hitoshi Noguchi , Nobuo Yamazaki , Shinji Saito
IPC分类号： B05D512
CPC分类号： G11B5/70678 , G11B5/7021 , G11B5/7023 , Y10S428/90
摘要： A method for producing a magnetic recording medium comprising: dispersing at least a binder and a ferromagnetic hexagonal ferrite powder to prepare a magnetic coating; and applying the magnetic coating to provide at least one magnetic layer, wherein the binder is at least one of: (a) a binder comprising 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM wherein M represents a hydrogen atom, an alkali metal or ammonium; and (b) a binder comprising 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group, and the ferromagnetic hexagonal ferrite powder has an average tabular diameter of from 10 to 40 nm and a water content of from 0.3 to 3% by weight.
摘要翻译：一种制造磁记录介质的方法，包括：分散至少一种粘结剂和一种铁磁性六角铁氧体粉末以制备磁性涂层; 以及施加所述磁性涂层以提供至少一个磁性层，其中所述粘合剂是以下至少一种：（a）包含0.2至0.7meq / g的至少一种选自-SO 3 M，-OSO 3 M，-PO （OM）2，-OPO（OM）2和-COOM，其中M表示氢原子，碱金属或铵; 和（b）包含0.5-5meq / g至少一种选自-CONR1R2，-NR1R2和-N + R1R2R3的极性基团的粘合剂，其中R1，R2和R3各自独立地表示氢原子或烷基，铁磁六方铁氧体粉末的平均片状直径为10〜40nm，水含量为0.3〜3重量％。

8. 发明授权

US5318828A Magnetic recording medium having multiple magnetic layers comprising magnetic particles and polyurethane resins having glass transition temperatures within specified ranges 失效
标题翻译：磁记录介质具有多个包含磁性颗粒的磁性层和具有玻璃化转变温度在特定范围内的聚氨酯树脂
公开(公告)号：US5318828A
公开(公告)日：1994-06-07
申请号：US26164
申请日：1993-03-01
申请人： Hitoshi Noguchi , Shinji Saito , Hiroshi Ogawa
发明人： Hitoshi Noguchi , Shinji Saito , Hiroshi Ogawa
IPC分类号： G11B5/702 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/714 , G11B5/716 , G11B5/00
CPC分类号： G11B5/7021 , G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/24975 , Y10T428/256 , Y10T428/265 , Y10T428/3158 , Y10T428/31591 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is disclosed comprising a non-magnetic support having provided thereon a plurality of magnetic layers containing a ferromagnetic powder dispersed in a binder, wherein the lower magnetic layer closest to the support contains as the binder at least one polyurethane resin having a glass transition temperature (Tg) of from -50.degree. C. to -10.degree. C., and the uppermost magnetic layer contains as the binder at least one polyurethane resin having a glass transition temperature of from more than 40.degree. C. to 100 .degree. C.The magnetic recording medium of the present invention exhibits excellent running durability as well as electromagnetic conversion characteristics.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上设置有多个含有分散在粘合剂中的铁磁粉末的磁性层，其中最靠近载体的下磁性层含有至少一种具有玻璃的聚氨酯树脂作为粘合剂转变温度（Tg）为-50℃至-10℃，最上层的磁性层含有玻璃化转变温度高于40℃至100℃的至少一种聚氨酯树脂作为粘合剂本发明的磁记录介质具有优异的运行耐久性以及电磁转换特性。

9. 发明授权

US07108903B2 Magnetic disc medium 失效
标题翻译：磁盘介质
公开(公告)号：US07108903B2
公开(公告)日：2006-09-19
申请号：US10704717
申请日：2003-11-12
申请人： Shinji Saito , Hitoshi Noguchi , Hideaki Shiga
发明人： Shinji Saito , Hitoshi Noguchi , Hideaki Shiga
IPC分类号： G11B5/82 , B65D85/30
CPC分类号： G11B5/738 , G11B5/70 , G11B5/70678 , G11B5/708 , G11B23/0332
摘要： A magnetic disc medium comprising: a magnetic sheet in the form of a disk; a case encasing the magnetic sheet so as to be capable of rotating; and a nonwoven liner fastened on an inner face of the case so as to face the magnetic sheet, wherein the magnetic sheet comprises a support, a substantially nonmagnetic lower layer, and a magnetic layer containing hexagonal ferrite powder dispersed in a binder and having central plane average surface roughness of from 1 nm to 4 nm, and the liner comprises polyethylene terephthalate in an amount of 20% by weight or more.
摘要翻译：一种磁盘介质，包括：磁盘形式的磁片; 封装磁性片以能够旋转的壳体; 以及紧固在所述壳体的内表面上以面对所述磁性片材的非织造衬里，其中所述磁性片材包括支撑体，基本上非磁性的下层以及分散在粘合剂中并具有中心平面的含有六边形铁氧体粉末的磁性层平均表面粗糙度为1nm至4nm，衬垫包含20重量％以上的聚对苯二甲酸乙二醇酯。

10. 发明授权

US06893701B2 Magnetic disk medium 失效
标题翻译：磁盘介质
公开(公告)号：US06893701B2
公开(公告)日：2005-05-17
申请号：US10712021
申请日：2003-11-14
申请人： Hitoshi Noguchi , Shinji Saito
发明人： Hitoshi Noguchi , Shinji Saito
IPC分类号： G11B5/012 , G11B5/706 , G11B5/73 , G11B5/738 , G11B5/82 , G11B11/08
CPC分类号： G11B5/82 , G11B5/012 , G11B5/70678 , G11B5/73 , G11B5/738 , G11B11/08 , Y10T428/24975 , Y10T428/265
摘要： A magnetic disk medium having on a support a magnetic layer containing hexagonal ferrite powder dispersed in a binder, with the support having a thickness of 20 μm to 80 μm and the magnetic disk medium having an inside diameter X of 2 mm to 10 mm, an outside diameter Y of 20 mm to 50 mm, an X/Y ratio satisfying the relation 0.05≦X/Y≦0.20 and a curl quantity of 1 mm or below, which is suitable for use in small-diameter portable computer equipment and video recorders, and besides, can attain a recording capacity of at least several hundred megabytes.
摘要翻译：一种磁盘介质，其在支撑体上具有分散在粘结剂中的含有六角铁氧体粉末的磁性层，其中所述载体的厚度为20μm至80μm，所述磁盘介质的内径X为2mm至10mm，外径Y为20mm〜50mm，X / Y比满足0.05 <= X / Y <0.20的关系，卷曲量为1mm以下，适用于小型便携式计算机设备，视频录像机，此外，可以达到至少几百兆的记录容量。

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