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1. 发明授权

US5217820A High density slave magnetic recording media having specified perpendicular squareness rectangular ratio, roughness and number of projections 失效
标题翻译：高密度从属磁记录介质具有指定的垂直矩形比例，粗糙度和突起数
公开(公告)号：US5217820A
公开(公告)日：1993-06-08
申请号：US540443
申请日：1990-06-13
申请人： Masanori Isshiki , Toshiyuki Suzuki , Nobuyoshi Saito , Takeo Ito
发明人： Masanori Isshiki , Toshiyuki Suzuki , Nobuyoshi Saito , Takeo Ito
IPC分类号： G11B5/706 , G11B5/73 , G11B5/86
CPC分类号： G11B5/70678 , G11B5/7305 , G11B5/865 , Y10S428/90
摘要： The high density slave magnetic recording media comprising on a non-magnetic substrate a magnetic recording layer coated with magnetic hexagonal ferrite powder along with a binder component to transfer the digital signals stored on the master magnetic recording media by the magnetic contact duplication process, is characterized in that the perpendicular squareness ratio of the magnetic recording layer is not less than 0.58 and is less than 0.7, center line average roughness Ra is not more than 0.01 .mu.m, and the number of convex projections whose pitches are 10 to 90 .mu.m and whose height is not less than 0.03 .mu.m pp (bottom to top) is not more than 10 per 1 mm of running direction. The slave magnetic recording media permits the functionally enough duplication efficiency of digital signals by the magnetic contact duplication process and can considerably curb the error rate during the reproduction of the duplicated digital signals.
摘要翻译：高密度从属磁记录介质包括在非磁性基板上，涂覆有磁性六边形铁氧体粉末的磁记录层以及粘合剂组分，以通过磁性接触复制过程转移存储在主磁记录介质上的数字信号，由于磁记录层的垂直矩形比不小于0.58且小于0.7，所以中心线平均粗糙度Ra不大于0.01μm，间距为10至90μm的凸出凸起的数量和其高度不小于0.03微米（从底部到顶部）每1mm行进方向不大于10。从属磁记录介质通过磁性接触复制过程允许数字信号的功能上足够的复制效率，并且可以在复制的数字信号的再现期间显着地抑制误码率。

2. 发明授权

US5032931A Method for magnetic transfer and apparatus therefor 失效
标题翻译：磁转移方法及其设备
公开(公告)号：US5032931A
公开(公告)日：1991-07-16
申请号：US517534
申请日：1990-04-25
申请人： Toshiyuki Suzuki , Masanori Isshiki
发明人： Toshiyuki Suzuki , Masanori Isshiki
IPC分类号： G11B5/86
CPC分类号： G11B5/865
摘要： A method for contact magnetic printing of recorded information is disclosed which comprises keeping in intimate mutual contact the magnetic surface of a recorded master magnetic recording medium and the magnetic surface of a blank slave magnetic recording medium which uses hexagonal ferrite magnetic particles as the magnetic material, controlling the temperature of the two-magnetic recording media so as to lower the coercive force of the slave magnetic recording medium relative to that of the master magnetic recording medium, and applying an external magnetic field thereto thereby causing the recorded information to be magnetically printed from the master magnetic recording medium to the slave magnetic recording medium. In accordance with this method, copies of pictures of high quality and sounds of highly desirable high-frequency characteristics can be produced by the contact magnetic printing technique using the slave magnetic recording medium possessing a coercive force equal to or greater than the coercive force of the master magnetic recording medium.

3. 发明授权

US4571653A Perpendicular magnetic recording head 失效
标题翻译：垂直磁记录头
公开(公告)号：US4571653A
公开(公告)日：1986-02-18
申请号：US421738
申请日：1982-09-23
申请人： Toshiyuki Suzuki , Masanori Isshiki
发明人： Toshiyuki Suzuki , Masanori Isshiki
IPC分类号： G11B5/127 , G11B5/17 , G11B5/12
CPC分类号： G11B5/1278 , G11B5/17
摘要： A perpendicular magnetic recording head comprising a pole formed of a highly permeable magnetic thin film facing at the end thereof the magnetic surface of a recording medium, a side member formed of a highly permeable magnetic material joined with the film surface of the pole, a nonmagnetic holder for holding the pole and the side member from the side surfaces, the nonmagnetic holder having coil hole, and an exciter coil wound around the pole and the side member through the coil hole, characterized in that the coil hole is gradually increasing in width from the end of the side member toward the rear.
摘要翻译：一种垂直磁记录头，包括由高度可渗透的磁性薄膜形成的磁极，该磁极在其末端面对记录介质的磁性表面，由与磁极的膜表面连接的高度可渗透的磁性材料形成的侧部件，非磁性的用于从侧面保持杆和侧构件的保持器，具有线圈孔的非磁性保持器和通过线圈孔缠绕在杆和侧构件周围的励磁线圈，其特征在于，线圈孔的宽度从侧部件的端部朝向后部。

4. 发明授权

US4383284A Perpendicular magnetic head and method of manufacturing the same 失效
标题翻译：垂直磁头及其制造方法
公开(公告)号：US4383284A
公开(公告)日：1983-05-10
申请号：US204051
申请日：1980-11-04
申请人： Masanori Isshiki
发明人： Masanori Isshiki
IPC分类号： G11B5/127 , G11B5/12 , G11B5/20 , G11B5/22
CPC分类号： G11B5/1278
摘要： A perpendicular magnetic recording head is disclosed which includes a block core of a high magnetic permeability material having a side surface substantially perpendicular to a magnetic surface of a magnetic tape moving relative to it, a thin film core including a magnetic thin film of a high magnetic permeability material, the thin film core being secured to the side surface of the block core and having a width smaller than the width of the block core, the thin film core having a pole section extending from said side surface of the block core substantially perpendicularly to the magnetic surface and in contact therewith at the end, and an exciting coil wound on the block core and thin film core.
摘要翻译：公开了一种垂直磁记录头，其包括具有大致垂直于相对于其移动的磁带的磁性表面的侧表面的高导磁率材料的块芯，薄膜芯，其包括高磁性磁性薄膜所述薄膜芯固定到所述块状芯的侧表面并且具有小于所述块状芯的宽度的宽度，所述薄膜芯具有从所述块状芯的所述侧表面基本上垂直于磁性表面并在其端部接触，以及缠绕在块状芯和薄膜芯上的励磁线圈。

5. 发明授权

US4622616A Thin film magnetic head for equalizing outputs of a two-channel tracking device 失效
标题翻译：用于均衡两通道跟踪装置的输出的薄膜磁头
公开(公告)号：US4622616A
公开(公告)日：1986-11-11
申请号：US673799
申请日：1984-11-21
申请人： Masanori Isshiki
发明人： Masanori Isshiki
IPC分类号： G11B5/31 , G11B5/28 , G11B5/22 , G11B5/42
CPC分类号： G11B5/3143 , G11B5/3166
摘要： The thin film magnetic head in accordance with the present invention for recording information on magnetic recording medium with two channels comprises a head-forming base, a pair of head sections formed on the base with a predetermined separation, a depth detection mark formed at the center of the separation between the head sections for detecting the length of the gap depth of the head sections, and a holding plated arranged opposite to the head-forming base to hold, the head sections and the depth detection mark therebetween. The depth detection mark is so arranged as to form an isosceles triangle, with its base extending along the head-forming base situated on the side facing to the recording medium, and its vertex located, facing to the base of the isosceles triangle, on the depth end line of the gaps of the head sections, on the side which is not facing the recording medium, as well as on the center line between the head sections.
摘要翻译：根据本发明的用于在具有两个通道的磁记录介质上记录信息的薄膜磁头包括头形成基座，在基座上形成预定间隔的一对头部部分，形成在中心处的深度检测标记用于检测头部间隙深度的长度的头部之间的间隔，以及与保持头部形成基座相对设置的保持电镀，头部和其间的深度检测标记。深度检测标记被布置成形成等腰三角形，其基部沿着位于面向记录介质的一侧的头部形成基部延伸，并且其顶点位于等腰三角形的基部上，位于头部部分的间隙的深度端部线，在不面向记录介质的一侧以及头部部分之间的中心线上。

6. 发明授权

US5545462A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5545462A
公开(公告)日：1996-08-13
申请号：US272278
申请日：1994-07-08
申请人： Narito Goto , Masanori Isshiki , Kunitsuna Sasaki , Nobuyuki Sekiguchi , Katsuyuki Takeda , Hideki Takahashi
发明人： Narito Goto , Masanori Isshiki , Kunitsuna Sasaki , Nobuyuki Sekiguchi , Katsuyuki Takeda , Hideki Takahashi
IPC分类号： B32B7/02 , B32B7/12 , B32B27/04 , B32B27/18 , B32B33/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/06 , G11B5/706 , G11B5/716 , G11B5/73 , B32B3/10 , B32B5/16 , G11B5/66
CPC分类号： G11B5/70605 , G11B5/70673 , G11B5/70678 , G11B5/716 , Y10S428/90 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/265
摘要： Disclosed is a magnetic recording medium characterized in that plural magnetic layers are provided on a non-magnetic support, the uppermost layer of the magnetic layers contains a ferromagnetic metallic powder and/or a hexagonal system magnetic powder and a binder, at least one layer other than the uppermost layer contains Co-containing iron oxide and a binder, the film thickness of the uppermost layer is 0.5 .mu.m or less, and the surface of the uppermost layer of the magnetic layers has an R.sub.10z value of the magnetic layer defined below of 50 nm or less, by which electromagnetic conversion characteristics of a magnetic recording medium can be improved.
摘要翻译：公开了一种磁记录介质，其特征在于，多个磁性层设置在非磁性载体上，磁性层的最上层含有强磁性金属粉末和/或六方晶系磁性粉末和粘合剂，至少一层其它比最上层含有含Co的氧化铁和粘合剂，最上层的膜厚为0.5μm以下，磁性层的最上层的表面的磁性层的R10z值为 50nm以下，可以提高磁记录介质的电磁转换特性。

7. 发明授权

US4719520A Method and apparatus for setting recording current in perpendicular magnetic recording apparatus 失效
标题翻译：在垂直磁记录装置中设定记录电流的方法和装置
公开(公告)号：US4719520A
公开(公告)日：1988-01-12
申请号：US721890
申请日：1985-04-11
申请人： Masanori Isshiki
发明人： Masanori Isshiki
IPC分类号： G11B5/00 , G11B5/02 , G11B5/027 , G11B5/03 , G11B5/127 , G11B5/706 , H04N9/835 , H04N9/79 , H04N9/83
CPC分类号： H04N9/8355 , G11B5/00 , G11B5/02 , G11B5/1278 , G11B5/70678
摘要： A method for superimposed recording of a first signal and a second signal with frequency which is less than the frequency for the first signal, in a perpendicular magnetic recording medium by means of a ring-shaped magnetic head. The mutually superimposed first and second signals are supplied to the magnetic head. The value of the first signal current to be supplied to the magnetic head is set at a value which is greater than the current value for which the reproduced output level of the first signal that was recorded on the magnetic recording medium attains a maximum, and a satisfactory superimposed recording characteristic can be obtained by such an arrangement.
摘要翻译：一种用于通过环形磁头在垂直磁记录介质中叠加记录具有小于第一信号的频率的频率的第一信号和第二信号的方法。相互叠加的第一和第二信号被提供给磁头。要提供给磁头的第一信号电流的值被设置为大于记录在磁记录介质上的第一信号的再现输出电平达到最大值的电流值，可以通过这种布置获得满意的叠加记录特性。

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