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51. 发明授权

US5496607A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5496607A
公开(公告)日：1996-03-05
申请号：US348949
申请日：1994-11-25
申请人： Hiroo Inaba , Kiyomi Ejiri , Jun-ichi Nakamikawa , Toshihiko Miura
发明人： Hiroo Inaba , Kiyomi Ejiri , Jun-ichi Nakamikawa , Toshihiko Miura
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/73 , G11B5/733 , G11B5/738 , B32B3/02 , B32B5/16 , G11B5/66
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10T428/265
摘要： Disclosed is a magnetic recording medium comprising at least two layers comprising at least one lower non-magnetic layer containing at least a non-magnetic particle and a binder on a non-magnetic support, and at least one upper magnetic layer containing at least a ferromagnetic particle and a binder on the lower non-magnetic layer, wherein a mean total thickness d of the upper magnetic layer is more than 0.01 .mu.m to less than 0.3 .mu.m, and a standard deviation .sigma. of the total thickness of the upper magnetic layer and the mean total thickness d of the upper magnetic layer satisfy the relationship of 0.05.ltoreq..sigma./d.ltoreq.0.5.
摘要翻译：公开了包括至少两层的磁记录介质，所述至少两层包括至少一个在非磁性载体上至少含有非磁性颗粒和粘合剂的下非磁性层，以及至少含有至少一种铁磁性颗粒和粘合剂，其中上磁性层的平均总厚度d大于0.01μm至小于0.3μm，上磁层的总厚度的标准偏差σ 并且上部磁性层的平均总厚度d满足0.05≤sigma/ d

52. 发明授权

US5258223A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5258223A
公开(公告)日：1993-11-02
申请号：US822975
申请日：1992-01-21
申请人： Hiroo Inaba , Kiyomi Ejiri
发明人： Hiroo Inaba , Kiyomi Ejiri
IPC分类号： G11B5/706 , G11B5/708 , G11B5/73 , G11B5/733 , G11B5/738 , G11B5/842 , G11B5/848 , B32B5/16 , B32B27/00 , G11B5/66
CPC分类号： G11B5/738 , G11B5/733 , G11B5/842 , G11B5/848 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/31551
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been formed on the lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has a dry thickness of not more than 1.0 .mu.m, the ferromagnetic powder in the upper magnetic layer has an average major axis of not more than 0.3 .mu.m and an average crystallite size of not more than 300 .ANG., the non-magnetic powder in the lower non-magnetic layer contains (i) a non-magnetic metal oxide powder and (ii) carbon black having an average primary particle diameter of less than 20 nm at a weight ratio of from 95/5 to 60/40, and the lower non-magnetic layer contains a polyurethane having at least three hydroxyl groups in the molecule thereof and a polyisocyanate compound. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上至少设置有包含分散有非磁性粉末的粘结剂的至少一个下部非磁性层，以及包括分散有铁磁性粉末的粘合剂的上磁性层，已经形成在下部非磁性层上，而下部非磁性层是湿的，其中上部磁性层的干燥厚度不大于1.0μm，上部磁性层中的铁磁性粉末具有平均长轴不大于0.3μm，平均微晶尺寸不超过300，下部非磁性层中的非磁性粉末含有（i）非磁性金属氧化物粉末和（ii）具有平均初级粒径小于20nm，重量比为95/5〜60/40，下部非磁性层含有分子中具有至少3个羟基的聚氨酯，而ap 异氰酸酯化合物。磁记录介质表现出优异的电磁特性，运行性能和耐久性。

53. 发明授权

US4652500A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4652500A
公开(公告)日：1987-03-24
申请号：US848168
申请日：1986-04-04
申请人： Kiyomi Ejiri , Shigeo Komine
发明人： Kiyomi Ejiri , Shigeo Komine
IPC分类号： C09D5/23 , G11B5/708 , G11B5/71 , G11B5/714 , G11B5/70
CPC分类号： G11B5/714 , G11B5/708 , G11B5/71 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium such as a magnetic recording disk or a magnetic recording tape comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a nonmagnetic inorganic powder and a ferromagnetic metal powder of a specific surface area in the range of 35-65 m.sup.2 /g dispersed in a binder, which is characterized in that said magnetic recording layer contains an alkyl ester of a fatty acid and an alkoxyalkyl ester of a fatty acid in amounts in the ranges of 5-15 wt. % and 0.5-10 wt. %, respectively, based on the amount of the ferromagnetic metal powder.
摘要翻译：一种磁记录介质，例如磁记录盘或磁记录带，其包括非磁性载体和设置在所述载体上的磁记录层，所述磁记录层包含非磁性无机粉末和比表面积的铁磁金属粉末分散在粘合剂中的35-65m 2 / g的范围，其特征在于所述磁记录层包含脂肪酸的烷基酯和脂肪酸的烷氧基烷基酯的量为5-15wt。％和0.5-10wt。％，分别基于铁磁性金属粉末的量。

54. 发明授权

US06893747B2 Magnetic tape 有权
标题翻译：磁带
公开(公告)号：US06893747B2
公开(公告)日：2005-05-17
申请号：US10172989
申请日：2002-06-18
申请人： Kiyomi Ejiri
发明人： Kiyomi Ejiri
IPC分类号： G11B5/70 , G11B5/706 , G11B5/714 , G11B5/78
CPC分类号： G11B5/70678 , G11B5/70
摘要： A magnetic tape is disclosed, comprising a support having thereon a magnetic layer comprising ferromagnetic particles and a binder as the main components, (i) the magnetic tape being for use in a magnetic recording/reproducing system in which signals recorded are reproduced with a magneto resistive head, (ii) the ferromagnetic particles contained in the magnetic layer being hexagonal-ferrite magnetic particles having an average tabular diameter of from 10 to 40 nm, and the magnetic layer having a machine direction coercive force Hc of from 158 to 350 kA/m, a squareness ratio SQ⊥ as measured in the direction perpendicular to the magnetic plane of 0.5 or lower, and a thickness of from 30 to 300 nm.
摘要翻译：公开了一种磁带，包括其上具有包含铁磁颗粒和粘合剂作为主要组分的磁性层的支撑体，（i）磁带用于磁记录/再现系统，其中记录的信号用磁电（ii）包含在磁性层中的铁磁颗粒是具有平均片状直径为10至40nm的六方晶系铁氧体磁性颗粒，并且具有机器方向矫顽力H c C的磁性层 > 158〜350kA / m，在与磁性平面垂直的方向测定的矩形比SQ⊥为0.5以下，厚度为30〜300nm。

55. 发明授权

US06773788B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06773788B2
公开(公告)日：2004-08-10
申请号：US10216849
申请日：2002-08-13
申请人： Masahiko Mori , Kiyomi Ejiri
发明人： Masahiko Mori , Kiyomi Ejiri
IPC分类号： G11B5706
CPC分类号： G11B5/70 , G11B5/70678 , G11B5/842 , Y10T428/257 , Y10T428/265
摘要： Provided is a magnetic recording medium exhibiting high C/N ratio and suited to high-density magnetic recording, particularly, to reproduction with MR heads. The magnetic recording medium comprises a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a flexible nonmagnetic support. The magnetic layer has an average thickness ranging from 0.02 to 0.2 &mgr;m, the ferromagnetic powder contained in the magnetic layer is a plate-shaped hexagonal ferrite ferromagnetic powder having an average plate diameter of 10 to 40 nm, the ratio of a volume of magnetic reversal to a volume of magnetic material particles is equal to or less than 3, the magnetic layer has a coercive force Hc equal to or higher than 159 kA/m, and components magnetically reversing in the magnetic field of 80 kA/m or less are less than 1 percent in the magnetization distribution of the magnetic layer.
摘要翻译：本发明提供一种表现出高C / N比且适于高密度磁记录的磁记录介质，特别是用MR磁头再现。磁性记录介质在柔性非磁性载体上依次包括非磁性粉末和粘合剂以及包含铁磁粉末和粘合剂的磁性层。磁性层的平均厚度为0.02〜0.2μm，磁性层所含的铁磁性粉末为板状六方铁素体铁磁粉末，平均板直径为10〜40nm，磁性反转体积的比例相对于一定体积的磁性材料粒子为3以下，磁性层的矫顽力Hc为159kA / m以上，在磁性方面为80kA / m以下的磁性反转成分较小超过1％的磁性层的磁化分布。

56. 发明授权

US06721123B2 Magnetic tape recording medium, magnetic tape recording and reproducing apparatus, magnetic tape recording method and magnetic tape cassette 失效
标题翻译：磁带记录介质，磁带记录和再现装置，磁带记录方法和磁带盒
公开(公告)号：US06721123B2
公开(公告)日：2004-04-13
申请号：US09946470
申请日：2001-09-06
申请人： Minoru Sueki , Kiyomi Ejiri , Kiyoo Morita
发明人： Minoru Sueki , Kiyomi Ejiri , Kiyoo Morita
IPC分类号： G11B5584
CPC分类号： G11B5/78 , G11B5/00813 , G11B5/584 , G11B23/107 , G11B23/30
摘要： A magnetic tape includes two servo tracks respectively extending in the longitudinal direction of the magnetic tape from the tape-width-direction two end portions of the magnetic tape, and a data area interposed between the two servo tracks. The azimuth angle &thgr;° of the data track of the data area satisfies an equation of 0 ≤ θ ≤ tan - 1 ⁡ ( 10 ⁢ p a × L ) , where a data track pitch is expressed as p (m), a magnetic tape width is expressed as L (m) and the greatest dimension change rate is expressed as (a) (%). Since the azimuth angle &thgr;° is determined in this manner, even in the case where the magnetic tape is deformed in shape and/or changed in dimension, an offtrack error can be prevented and thus, the data track can be traced in the data area accurately.
摘要翻译：磁带包括分别从磁带的带宽度方向的两个端部沿着磁带的纵向方向延伸的两个伺服磁道以及插入在两个伺服磁道之间的数据区域。数据区的数据轨迹的方位角θ°满足数据轨迹间距表示为p（m）的方程式，磁带宽度表示为L（m），最大尺寸变化率表示为（一个）（％）。由于以这种方式确定方位角θ°，所以即使在磁带的形状变形和/或尺寸变化的情况下，也可以防止纵横差错，从而可以在数据区域中追踪数据轨迹准确。

57. 发明授权

US06482506B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06482506B1
公开(公告)日：2002-11-19
申请号：US09648823
申请日：2000-08-25
申请人： Kiyomi Ejiri , Masahiko Mori
发明人： Kiyomi Ejiri , Masahiko Mori
IPC分类号： G11B5716
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/24975 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： Provided is a particulate magnetic recording medium having excellent electromagnetic characteristics, especially, a particulate magnetic recording medium which achieves a high output and a low noise and which is suitable for reproduction with an MR head. A magnetic recording medium comprising a flexible nonmagnetic support having thereon, in order, a nonmagnetic layer containing a nonmagnetic powder and a binder and at least two magnetic layers including an uppermost magnetic layer and a lowermost magnetic layer, each containing a ferromagnetic powder and a binder, wherein said at least two magnetic layers have a total thickness of from 0.02 &mgr;m to 0.5 &mgr;m and an average particle volume V(u) and a saturation magnetization &sgr;s(u) of a ferromagnetic powder in said uppermost magnetic layer are, respectively, higher than an average particle volume V(L) and a saturation magnetization &sgr;s(L) of a ferromagnetic powder in said lowermost magnetic layer.
摘要翻译：本发明提供一种具有优异电磁特性的微粒磁记录介质，特别是实现高输出和低噪声的微粒磁记录介质，适用于MR磁头再现。一种磁记录介质，包括其上具有柔性非磁性载体按顺序，包含非磁性粉末和粘合剂的非磁性层和包含最高磁性层和最低磁性层的至少两个磁性层，每个磁性层都含有铁磁性粉末和粘合剂，其中所述至少两个磁性层具有总共所述最高磁性层中的铁磁性粉末的平均粒子体积V（u）和饱和磁化强度s（u）分别高于平均粒子体积V（L）和所述最低磁性层中的铁磁粉末的饱和磁化强度（L）。

58. 发明授权

US06203934B1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06203934B1
公开(公告)日：2001-03-20
申请号：US09169189
申请日：1998-10-08
申请人： Koji Naoe , Kiyomi Ejiri , Naoto Abe
发明人： Koji Naoe , Kiyomi Ejiri , Naoto Abe
IPC分类号： G11B566
CPC分类号： G11B5/738 , G11B5/70 , G11B5/70621
摘要： A magnetic recording medium is described, which comprises a support having thereon a magnetic layer comprising a ferromagnetic metal powder and a binder resin, wherein the coercive force (Hc) of the magnetic layer is from 2,100 to 3,000 Oe, SFD (switching field distribution) of the magnetic layer is 0.30 or less, and an average thickness: d of the magnetic layer is in the range of: d≦ recording wavelength &lgr;/4.
摘要翻译：描述了一种磁记录介质，其包括其上具有包含铁磁性金属粉末和粘合剂树脂的磁性层的支撑体，其中磁性层的矫顽力（Hc）为2100〜3000Oe，SFD（切换场分布）的磁性层的平均厚度d在以下的范围内：d <=记录波长lambd / 4。

59. 发明授权

US6143403A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US6143403A
公开(公告)日：2000-11-07
申请号：US433797
申请日：1999-11-03
申请人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
发明人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
IPC分类号： G11B5/66 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , G11B5/848
CPC分类号： G11B5/848 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , Y10S428/90 , Y10T428/12472 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/253 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265 , Y10T428/269
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上至少设置有包含分散有非磁性粉末的粘结剂的至少一个下部非磁性层，以及包括分散有铁磁性粉末的粘合剂的上磁性层，已经涂覆在所述下部非磁性层上，而下部非磁性层是湿的，其中上部磁性层的平均干燥厚度（d）不大于1.0μm，平均厚度变化（DELTA d）在上层磁性层和下层非磁性层之间的界面不大于d / 2。磁记录介质表现出优异的电磁特性，运行性能和耐久性。

60. 发明授权

US6025082A Magnetic recording medium 失效
公开(公告)号：US6025082A
公开(公告)日：2000-02-15
申请号：US846035
申请日：1997-04-25
申请人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
发明人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
IPC分类号： G11B5/66 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , G11B5/848
CPC分类号： G11B5/848 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , Y10S428/90 , Y10T428/12472 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/253 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265 , Y10T428/269 , Y10T428/31551 , Y10T428/31721 , Y10T428/31855
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.

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