公开(公告)号：US5034243A

公开(公告)日：1991-07-23

申请号：US430167

申请日：1989-11-01

申请人： Katsuyoshi Chiba ,  Masayuki Katsumoto ,  Yasutaro Uesaka ,  Heigo Ishihara ,  Naoki Kodama ,  Hajime Fukke ,  Iwao Matsuyama ,  Tsuneo Suganuma

发明人： Katsuyoshi Chiba ,  Masayuki Katsumoto ,  Yasutaro Uesaka ,  Heigo Ishihara ,  Naoki Kodama ,  Hajime Fukke ,  Iwao Matsuyama ,  Tsuneo Suganuma

IPC分类号： G11B5/11 ,  G11B5/845

CPC分类号： G11B5/845 ,  G11B5/11

摘要： A method for magnetic orientation of a magnetic recording medium using Meissner effect of a superconductor and a system therefor and a magnetic recording medium produced thereby. The magnetic particles of plate hexagonal barium ferrite in the magnetic coating are allowed to orient in the longitudinal direction thereof so that a magnetic recording medium having a magnetic orientation in such direction with the magnetic particles can be obtained.

公开(公告)号：US5180608A

公开(公告)日：1993-01-19

申请号：US604380

申请日：1990-10-24

申请人： Katsuyoshi Chiba ,  Masayuki Katsumoto ,  Yasutaro Uesaka ,  Hajime Fukke ,  Heigo Ishihara ,  Iwao Matsuyama ,  Naoki Kodama ,  Hitoshi Inoue ,  Yoshiharu Terada

发明人： Katsuyoshi Chiba ,  Masayuki Katsumoto ,  Yasutaro Uesaka ,  Hajime Fukke ,  Heigo Ishihara ,  Iwao Matsuyama ,  Naoki Kodama ,  Hitoshi Inoue ,  Yoshiharu Terada

IPC分类号： G11B5/845

CPC分类号： G11B5/845 ,  Y10S428/90

摘要： A coating type, magnetic disk is produced by applying a magnetic paint containing magnetic powders in a dispersed state to a non-magnetic substrate, thereby forming a magnetic recording film thereon, and applying surface waves to the magnetic recording film in an undried state. By applying the surface waves to the magnetic recording film, dispersibility and orientation of the magnetic powders are improved and a longitudinally oriented, coating type magnetic disk with distinguished electromagnetic properties, such as a high S/N ratio, etc. can be obtained.

摘要翻译： 通过将含有分散状态的磁性粉末的磁性涂料施加到非磁性基板上，从而在其上形成磁记录膜，并以未干燥状态向磁记录膜施加表面波，来制造涂层型磁盘。 通过将表面波施加到磁记录膜，改善了磁粉的分散性和取向性，并且可以获得具有高S / N比等的电磁特性的纵向取向的涂布型磁盘。

公开(公告)号：US5180616A

公开(公告)日：1993-01-19

申请号：US293177

申请日：1989-01-03

申请人： Hajime Fukke ,  Motoo Akagi ,  Iwao Matsuyama ,  Masayuki Katsumoto ,  Hitoshi Inoue ,  Naoki Kodama ,  Yasutaro Uesaka

发明人： Hajime Fukke ,  Motoo Akagi ,  Iwao Matsuyama ,  Masayuki Katsumoto ,  Hitoshi Inoue ,  Naoki Kodama ,  Yasutaro Uesaka

IPC分类号： C09D5/00 ,  G11B5/70 ,  G11B5/706 ,  G11B5/712

CPC分类号： C09D5/00 ,  G11B5/70 ,  G11B5/70647 ,  G11B5/712 ,  Y10S428/90 ,  Y10T428/265

摘要： A method for manufacturing a magnetic paint by mixing a resin composition powder as a dispersing binder for a magnetic powder with the magnetic powder, or together with a filler, and grinding the mixture under a high shear stress is disclosed. A magnetic recording medium such as a magnetic disk, etc., prepared by using the magnetic paint, can have a magnetic coating film having a substantially uniform film thickness of not more than 0.9 .mu.m and a surface roughness of not more than 0.05 .mu.m Ra before surface finishing.

摘要翻译： 公开了一种通过将作为磁性粉末的分散粘合剂的树脂组合物粉末与磁性粉末或与填料一起混合并在高剪切应力下研磨混合物来制造磁性涂料的方法。 通过使用磁性涂料制备的磁盘等磁记录介质，可以制成膜厚基本上不大于0.9μm，表面粗糙度不大于0.05μm的磁性涂膜 表面处理前的Ra。

公开(公告)号：US5028496A

公开(公告)日：1991-07-02

申请号：US263770

申请日：1988-10-28

申请人： Yasutaro Uesaka ,  Hajime Fukke ,  Katsuyoshi Chiba ,  Iwao Matsuyama

发明人： Yasutaro Uesaka ,  Hajime Fukke ,  Katsuyoshi Chiba ,  Iwao Matsuyama

IPC分类号： G11B5/70 ,  G11B5/845

CPC分类号： G11B5/70 ,  G11B5/845 ,  Y10S428/90

摘要： The present invention proposes a ratio of an applied field H.sub.s to a coercivity H.sub.c as a parameter which gives an influence to the write/read characteristics of a magnetic coated recording medium, especially, a reproduction output E.sub.o at a low recording density and a recording density D.sub.50 which provides an output of the half of E.sub.o. By selecting the ratio H.sub.s /H.sub.c to be not larger than 2.1, a magnetic coated recording medium having large values of E.sub.o and D.sub.50 or suited to a high density magnetic recording can be provided with good reproducibility.

摘要翻译： 本发明提出了施加磁场Hs与矫顽磁力Hc的比值作为影响磁性涂覆记录介质的写入/读取特性的参数，特别是在低记录密度下的再现输出Eo和记录密度 D50提供了一半的输出。 通过选择Hs / Hc的比例不大于2.1，可以提供具有大的Eo和D50值或适用于高密度磁记录的磁性涂层记录介质，具有良好的再现性。

公开(公告)号：US4229312A

公开(公告)日：1980-10-21

申请号：US66234

申请日：1979-08-13

申请人： Waichi Nagashiro ,  Hajime Fukke ,  Yoshiki Kato ,  Teruo Tsunoda ,  Teruaki Kobayashi ,  Yoichi Oba ,  Katsuyoshi Chiba ,  Munehisa Mitsuya ,  Heigo Ishihara ,  Mitsushi Endo

发明人： Waichi Nagashiro ,  Hajime Fukke ,  Yoshiki Kato ,  Teruo Tsunoda ,  Teruaki Kobayashi ,  Yoichi Oba ,  Katsuyoshi Chiba ,  Munehisa Mitsuya ,  Heigo Ishihara ,  Mitsushi Endo

IPC分类号： G11B5/70 ,  C09D5/23 ,  C09D129/14 ,  C09D131/04 ,  C09D161/04 ,  C09D163/00 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

CPC分类号： G11B5/7023

摘要： A method of manufacturing a paint composite for magnetic films wherein a mixture consisting of a magnetic powder, a polymer such as polyvinylbutyral, and a solvent is ground under a shear stress of 10-400 kg/cm.sup.2, and the ground mixture has a solvent, an epoxy resin and a phenol resin added thereto and is further ground. When a magnetic disk is produced using a paint which has been obtained by executing the first grinding under a shear stress of 10-400 kg/cm.sup.2 with a kneader or the like, it is endowed with excellent electric characteristics and surface flatness.

摘要翻译： 制造用于磁性膜的涂料复合物的方法，其中将由磁性粉末，聚乙烯醇缩丁醛等聚合物和溶剂组成的混合物在10-400kg / cm2的剪切应力下研磨，并且研磨的混合物具有溶剂， 加入其中的环氧树脂和酚醛树脂，并进一步研磨。 当使用通过使用捏合机等在10-400kg / cm 2的剪切应力下执行第一次研磨而获得的涂料制造磁盘时，具有优异的电特性和表面平坦度。

公开(公告)号：US4189508A

公开(公告)日：1980-02-19

申请号：US943123

申请日：1978-09-18

申请人： Katsuyoshi Chiba ,  Yoshiki Kato ,  Teruo Tsunoda ,  Hajime Fukke ,  Teruaki Kobayashi ,  Heigo Ishihara ,  Waichi Nagashiro ,  Munehisa Mitsuya

发明人： Katsuyoshi Chiba ,  Yoshiki Kato ,  Teruo Tsunoda ,  Hajime Fukke ,  Teruaki Kobayashi ,  Heigo Ishihara ,  Waichi Nagashiro ,  Munehisa Mitsuya

IPC分类号： G11B5/02 ,  G11B5/845 ,  H01F10/02

CPC分类号： G11B5/845 ,  G11B5/02

摘要： A process for the preparation of a magnetic recording medium comprising;applying a magnetic coating material composed of dispersing a ferromagnetic fine powder in a high molecular binder onto the surfaces of a nonmagnetic support member to form a coating thereon;arraying one or more sets of magnet pairs on the sides of front and back surfaces of said support member, each of said magnet pairs being deviated by a predetermined distance in the moving direction of said support member such that said magnet pairs will not face to each other; andapplying a magnetic field in such a manner that the magnetic field applied to said coating by the magnet pairs arrayed on the side of the front surface of said support member is greater than the magnetic field applied to said coating by the magnet pairs arrayed on the side of the back surface of said support member, thereby satisfying the requirements ofDo.ltoreq.a,b wherein Do represents a distance between the surface of said support member and said magnet pairs, a an average distance between the magnets constituting said magnet pairs arrayed on the side of the front surface of said support member, and b an average distance between the magnets constituting said magnet pairs arrayed on the side of the back surface of said support member.

摘要翻译： 一种制备磁记录介质的方法，包括： 将由铁磁性细粉末分散在高分子粘合剂中的磁性涂料施加到非磁性支撑构件的表面上以在其上形成涂层; 在所述支撑构件的前表面和后表面的侧面上排列一组或多组磁体对，每个所述磁体对在所述支撑构件的移动方向上偏离预定距离，使得所述磁体对将不面对每个 其他; 并施加磁场，使得排列在所述支撑构件的前表面侧上的磁体对施加到所述涂层的磁场大于通过排列在所述支撑构件的前面的磁体对施加到所述涂层的磁场 从而满足Do a的要求，其中Do表示所述支撑构件的表面与所述磁体对之间的距离，构成所述磁体对的磁体之间的平均距离 排列在所述支撑构件的前表面的侧面上，b是构成所述磁体对的磁体之间的平均距离，排列在所述支撑构件的后表面侧。

公开(公告)号：US4238341A

公开(公告)日：1980-12-09

申请号：US84453

申请日：1979-10-12

申请人： Yoshiki Kato ,  Heigo Ishihara ,  Hajime Fukke ,  Katsuyoshi Chiba ,  Waichi Nagashiro ,  Teruo Tsunoda ,  Munehisa Mitsuya

发明人： Yoshiki Kato ,  Heigo Ishihara ,  Hajime Fukke ,  Katsuyoshi Chiba ,  Waichi Nagashiro ,  Teruo Tsunoda ,  Munehisa Mitsuya

IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/708 ,  H01F1/113

CPC分类号： G11B5/708 ,  G11B5/7023 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/31511 ,  Y10T428/31877

摘要： A composition of magnetic recording media consisting of a ferromagnetic powder such as .gamma.-Fe.sub.2 O.sub.3, a binder and single crystal alumina as a reinforcing agent. Single crystal .alpha.-alumina is preferably used as said single crystal alumina and its amount is preferably from 1 to 20% by weight based on the magnetic powder.

摘要翻译： 由诸如γ-Fe 2 O 3的铁磁粉末，粘合剂和作为增强剂的单晶氧化铝组成的磁记录介质的组合物。 单晶α-氧化铝优选用作所述单晶氧化铝，其量优选为基于磁粉的1至20重量％。

公开(公告)号：US5296995A

公开(公告)日：1994-03-22

申请号：US549

申请日：1993-01-04

申请人： Seiji Yonezawa ,  Keiji Kataoka ,  Hajime Fukke ,  Tsuneo Terasawa ,  Keizo Kato ,  Harukazu Miyamoto ,  Klaus Kinstatter ,  Masaru Ito ,  Norio Ohta

发明人： Seiji Yonezawa ,  Keiji Kataoka ,  Hajime Fukke ,  Tsuneo Terasawa ,  Keizo Kato ,  Harukazu Miyamoto ,  Klaus Kinstatter ,  Masaru Ito ,  Norio Ohta

IPC分类号： G09B5/06 ,  G11B5/012 ,  G11B5/55 ,  G11B5/58 ,  G11B5/596 ,  G11B5/62 ,  G11B5/74 ,  G11B5/82 ,  G11B5/84 ,  G11B5/855 ,  G11B7/007 ,  G11B19/02 ,  G11B20/12 ,  G11B27/034 ,  G11B27/10 ,  G11B27/19 ,  G11B27/28 ,  G11B9/02 ,  B05D1/32 ,  G06K19/06 ,  G11B9/08

CPC分类号： B82Y10/00 ,  G09B5/065 ,  G11B19/02 ,  G11B20/1252 ,  G11B27/034 ,  G11B27/105 ,  G11B27/19 ,  G11B27/28 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/58 ,  G11B5/596 ,  G11B5/59633 ,  G11B5/62 ,  G11B5/74 ,  G11B5/743 ,  G11B5/82 ,  G11B5/84 ,  G11B5/855 ,  G11B2020/1259 ,  G11B2220/211 ,  G11B2220/2537

摘要： The present invention uses a magnetic recording medium equipped with those magnetically readable recording servo pits which are preformed on a magnetic recording medium and have different magnetic characteristics from those of a recording magnetic film, detects magnetically a tracking signal or preformat signals such as sync signals, address signals, and the like, from the magnetic flux distribution (leakage magnetic field) occurring at edges of each of the servo pits using a magnetic head, makes servo control of the position of the magnetic head by the detected tracking signal and records or reads magnetically the data along the center of a track. In the magnetic recording medium of the present invention, magnetically readable, wobbled servo pits or sync pits, track address pits and data pits are preformed on the magnetic recording medium, these pit portions have locally different magnetic characteristics from those of the recording magnetic film and have a magnetic film structure wherein saturated magnetization is smaller than at other portions or the magnetic film is removed locally. These preformed pits can be read magnetically by detecting the local magnetic field (leakage magnetic field) generated at their edges by the magnetic head.

摘要翻译： 本发明使用配备有磁记录伺服凹坑的磁记录介质，它们在磁记录介质上执行，并且具有与记录磁膜的磁特性不同的磁特性，磁性地检测跟踪信号或预格式化信号，例如同步信号， 地址信号等从使用磁头的每个伺服凹坑的边缘处出现的磁通量分布（泄漏磁场）通过检测到的跟踪信号进行伺服控制磁头的位置并记录或读取 沿磁道中心的数据。 在本发明的磁记录介质中，在磁记录介质上执行磁读取的摆动的伺服凹坑或同步凹坑，轨道地址凹坑和数据凹坑，这些凹坑部分具有与记录磁膜的磁特性不同的磁特性， 具有其中饱和磁化小于其它部分的磁性膜结构，或者局部去除磁性膜。 这些预制凹坑可以通过磁头检测在其边缘处产生的局部磁场（泄漏磁场）而被磁性读取。

公开(公告)号：US4873129A

公开(公告)日：1989-10-10

申请号：US156457

申请日：1988-02-16

申请人： Hajime Fukke

发明人： Hajime Fukke

IPC分类号： C09D5/23 ,  C09D175/14 ,  G11B5/716 ,  G11B5/73 ,  G11B5/855

CPC分类号： G11B5/855 ,  G11B5/716 ,  Y10S428/90

摘要： A coating magnetic recording medium which comprises two or more kinds of magnetic films different from one another provided on the same side surface of a non-magnetic substrate.

摘要翻译： 一种涂覆磁记录介质，其包括设置在非磁性基板的同一侧表面上彼此不同的两种或更多种磁性膜。

公开(公告)号：US4789581A

公开(公告)日：1988-12-06

申请号：US82213

申请日：1987-08-06

申请人： Hajime Fukke ,  Motoo Akagi ,  Yoshiki Kato ,  Waichi Nagashiro

发明人： Hajime Fukke ,  Motoo Akagi ,  Yoshiki Kato ,  Waichi Nagashiro

IPC分类号： C09D5/23 ,  C09D129/04 ,  C09D161/04 ,  C09D161/06 ,  C09D163/00 ,  G11B5/70 ,  G11B5/82 ,  G11B5/84

CPC分类号： G11B5/84 ,  G11B5/70 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31511

摘要： A sufficient reproduced output can be attained even in a coating thickness of as small as 1 .mu.m, preferably 0.1 to 0.5 .mu.m with a magnetic recording medium comprising a substrate and a coating film containing magnetic powder formed on the substrate, wherein the content of the magnetic powder in the coating film is 66 to 90% by weight.

摘要翻译： 即使在包含基材的磁记录介质和在基板上形成的含有磁性粉末的涂膜的情况下，即使在小于1μm，优选为0.1至0.5μm的涂层厚度下也可以获得足够的再现输出，其中， 涂膜中的磁粉为66〜90重量％。