公开(公告)号：US4996089A

公开(公告)日：1991-02-26

申请号：US380295

申请日：1989-07-17

申请人： Osamu Saito ,  Hisamitsu Kamezaki ,  Masashi Suenaga ,  Ryo Nagai ,  Shinichiro Iuchi ,  Hitoshi Watanabe ,  Hideo Fujiwara

发明人： Osamu Saito ,  Hisamitsu Kamezaki ,  Masashi Suenaga ,  Ryo Nagai ,  Shinichiro Iuchi ,  Hitoshi Watanabe ,  Hideo Fujiwara

IPC分类号： B41M5/26 ,  G11B7/24 ,  G11B7/244 ,  G11B7/247 ,  G11B7/254

CPC分类号： G11B7/2575 ,  G11B7/2472 ,  G11B7/2534 ,  G11B7/254 ,  Y10S428/913 ,  Y10S430/145 ,  Y10S430/146 ,  Y10S430/165

摘要： An optical data recording medium provided with a recording layer, the recording medium having excellent durability to light and heat, superior writing sensitivity and a high C/N value, wherein at least one a group of anion selected from a group of hexafluorophosphate ion (PF.sub.6 .sup.-), trifluoromethane sulfonate ion (CF.sub.3 SO.sub.3 .sup.-) or thiocyanate ion (SCN.sup.-) is present as the anion in an indol cyanine dye having a methyne chain present in the recording layer of the optical data recording medium.

公开(公告)号：US4948667A

公开(公告)日：1990-08-14

申请号：US26620

申请日：1987-03-17

申请人： Hirosuke Mikami ,  Hideo Fujiwara ,  Takeshi Tottori

发明人： Hirosuke Mikami ,  Hideo Fujiwara ,  Takeshi Tottori

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/147 ,  G11B5/187 ,  G11B5/255

CPC分类号： G11B5/187 ,  G11B5/147 ,  G11B5/255 ,  Y10S428/90 ,  Y10T428/1171 ,  Y10T428/265

摘要： A magnetic head for write and read of information, the core of which is at least in part composed of magnetic metal thin layers and non-magnetic intermediate metal oxide layers alternately laminated is provided. The metal is a cobalt base amorphous alloy or permalloy and the metal oxide is selected from SiO, Al.sub.2 O.sub.3, MgO and BaTiO.sub.3, which has a Vickers hardness of not less than 200 to less than 1,200. The use of the magnetic head does not injure a magnetic recording medium and contributes to improvement of the durability of the magnetic recording medium.

摘要翻译： 提供用于写入和读取信息的磁头，其磁芯至少部分由磁性金属薄层和非磁性中间金属氧化物层交替层叠组成。 金属是钴基非晶合金或坡莫合金，金属氧化物选自SiO 2，Al 2 O 3，MgO和BaTiO 3，维氏硬度不低于200至小于1200。 磁头的使用不会损伤磁记录介质并有助于提高磁记录介质的耐久性。

公开(公告)号：US4933797A

公开(公告)日：1990-06-12

申请号：US255451

申请日：1988-10-07

申请人： Hikaru Mizutani ,  Kunio Wakai ,  Hideo Fujiwara ,  Hideaki Niimi ,  Noboru Isoe ,  Toshio Doi

发明人： Hikaru Mizutani ,  Kunio Wakai ,  Hideo Fujiwara ,  Hideaki Niimi ,  Noboru Isoe ,  Toshio Doi

IPC分类号： G11B23/03 ,  G11B23/087

CPC分类号： G11B23/0308 ,  G11B23/08735 ,  G11B23/08785

摘要： In a recording tape cartridge having a cartridge case, magnetic recording tape and a front lid and a rear lid for protecting the magnetic tape, there are provided entrance preventing members at a bottom the cartridge case facing to clearances between side edges of the front lid and case body for preventing entrance of harmful floating particles into the area near the recording tape so as to prevent corrosion of the recording tape.

公开(公告)号：US4870523A

公开(公告)日：1989-09-26

申请号：US71348

申请日：1987-07-09

申请人： Osamu Inagoya ,  Hideo Fujiwara ,  Yoshito Tanaka ,  Takeshi Ohnuki

发明人： Osamu Inagoya ,  Hideo Fujiwara ,  Yoshito Tanaka ,  Takeshi Ohnuki

IPC分类号： G11B5/10 ,  G11B5/265 ,  G11B5/48

CPC分类号： G11B5/4886 ,  G11B5/10 ,  G11B5/2655

摘要： A magnetic head apparatus used for a movable magnetic medium, comprising a magnetic head core in which a recording/reproducing core and an erasing core are respectively disposed on the entrance side of the movable medium and on the exit side of the movable medium, both of the cores being formed as an integrated magnetic core. The head cap of the recording/reproducing core is placed within a range defined between a position spaced about 0% of the longitudinal length of the integrated magnetic core apart from the center of the magnetic core toward the entrance side of the movable medium and another position spaced about 20% of the longitudinal length of the integrated magnetic core apart from the center toward the exit side of the movable medium.

摘要翻译： 一种用于可移动磁介质的磁头装置，包括磁头芯，其中记录/再现芯和擦除芯分别设置在可移动介质的入口侧和可移动介质的出口侧上， 芯部形成为集成磁芯。 记录/再现核心的头盖被放置在从集成磁芯的纵向长度的大约0％与磁芯的中心分开的距离朝向可移动介质的入口侧的位置之间限定的范围内，另一位置 间隔约20％的集成磁芯的中心向可移动介质的出口侧的纵向长度。

公开(公告)号：US4803578A

公开(公告)日：1989-02-07

申请号：US861349

申请日：1986-05-09

申请人： Hideo Fujiwara ,  Akito Sakemoto ,  Osamu Inagoya

发明人： Hideo Fujiwara ,  Akito Sakemoto ,  Osamu Inagoya

IPC分类号： G11B5/58 ,  G11B17/32 ,  G11B21/20 ,  G11B5/54

CPC分类号： G11B5/58 ,  G11B17/32

摘要： In a magnetic head carriage assembly which includes a head carriage for mounting a magnetic head for slidably contacting with a rotating magnetic disc and a clamper for mounting a clamp shoe disposed to oppose the magnetic head and biased toward the head carriage, there is provided a pivot for confining the movement of the clamp shoe in a direction perpendicular to the direction of rotational plane of the magnetic disc and a cantilever spring for mounting the magnetic head on the carriage or clamper.

摘要翻译： 在一种磁头托架组件中，该磁头托架组件包括用于安装用于与旋转磁盘滑动接触的磁头的头托架和用于安装设置成与磁头相对并被朝向头托架偏压的夹钳的夹持器， 用于限制夹钳在与磁盘的旋转平面的方向垂直的方向上的移动;以及悬臂弹簧，用于将磁头安装在滑架或夹持器上。

公开(公告)号：US4774616A

公开(公告)日：1988-09-27

申请号：US694386

申请日：1984-12-04

申请人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito ,  Mitsuhiro Kudo

发明人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito ,  Mitsuhiro Kudo

IPC分类号： G11B5/31 ,  G11B5/265 ,  G11B5/16 ,  G11B5/22

CPC分类号： G11B5/2651 ,  G11B5/2655

摘要： The present invention relates to a magnetic head, which can form guard bands on a magnetic recording medium and which is especially suitable for magnetic discs, and a fabrication process thereof. The magnetic core of the present invention includes a recording and reproduction head core (31) and an erasure head core (32) which is integrally joined in series to the head core (31) for forming guard bands. Magnetic circuits are constructed of metallic magnetic materials (34), (34'), (35) and (35') formed on non-magnetic members (33) and (33'). As a result, a recording medium having high coercive forces can be recorded while the track width is reduced and the fabrication is facilitated with a high accuracy.

摘要翻译： PCT No.PCT / JP84 / 00159 Sec。 371日期1984年12月4日第 102（e）日期1984年12月4日PCT提交1984年4月2日PCT公布。 公开号WO84 / 03984 日期：1984年10月11日。磁头技术领域本发明涉及一种能够在磁记录介质上形成保护带并且特别适用于磁盘的磁头及其制造方法。 本发明的磁芯包括记录和再现头芯（31）和擦除头芯（32），它与头芯（31）串联成一体，用于形成防护带。 磁路由形成在非磁性构件（33）和（33'）上的金属磁性材料（34），（34'），（35）和（35'）构成。 结果，可以记录具有高矫顽力的记录介质，同时减小轨道宽度并且以高精度促进制造。

公开(公告)号：US4701819A

公开(公告)日：1987-10-20

申请号：US777744

申请日：1985-09-19

申请人： Osamu Inagoya ,  Hideo Fujiwara ,  Takeshi Tottori ,  Minoru Yamano ,  Noriyuki Kumasaka ,  Shigekazu Otomo ,  Mitsuhiro Kudo ,  Juiti Morikawa ,  Kiyoshi Ishihara ,  Akira Usui ,  Masashi Hayashi

发明人： Osamu Inagoya ,  Hideo Fujiwara ,  Takeshi Tottori ,  Minoru Yamano ,  Noriyuki Kumasaka ,  Shigekazu Otomo ,  Mitsuhiro Kudo ,  Juiti Morikawa ,  Kiyoshi Ishihara ,  Akira Usui ,  Masashi Hayashi

IPC分类号： G11B5/127 ,  G11B5/187 ,  G11B5/21 ,  G11B5/265 ,  G11B5/31 ,  G11B5/22 ,  G11B5/42

CPC分类号： G11B5/3103 ,  G11B5/127 ,  G11B5/1878 ,  G11B5/21 ,  G11B5/265

摘要： A magnetic head having a pair of core halves each combined through a magnetic gap, each of the core halves comprising a core base having slanted side surfaces on the side opposing to the magnetic gap and a magnetic thin layer formed on the surfaces of the core base on the side opposing the magnetic gap with magnetic material of high saturation magnetic flux density, the minimum value of the sum of products of vertical cross sectional areas of the respective magnetic paths of each of the core halves except for the path of the magnetic gap and the respective saturation magnetic flux densities of the respective parts is greater than the product of the area of the magnetic gap and the saturation magnetic flux density of the magnetic thin layer.

摘要翻译： 一种磁头，其具有通过磁隙组合的一对芯半部，每个磁芯半部包括在与磁隙相对的一侧上具有倾斜的侧表面的芯基部和形成在芯基部的表面上的磁性薄层 在与磁饱和磁通密度高的磁性材料相对的一侧上，除了磁隙的路径之外的每个磁芯半部的各个磁路的垂直横截面积的乘积之和的最小值，以及 各部分的各自的饱和磁通密度大于磁性薄层的面积和磁性薄层的饱和磁通密度的乘积。

公开(公告)号：US4439794A

公开(公告)日：1984-03-27

申请号：US264706

申请日：1981-05-18

申请人： Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Takeshi Kimura ,  Noriyuki Kumasaka ,  Nobuo Kobayashi ,  Takeo Yamashita ,  Teizo Tamura ,  Hideo Zama ,  Mitsuhiro Kudo ,  Tsutomu Iimura

发明人： Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Takeshi Kimura ,  Noriyuki Kumasaka ,  Nobuo Kobayashi ,  Takeo Yamashita ,  Teizo Tamura ,  Hideo Zama ,  Mitsuhiro Kudo ,  Tsutomu Iimura

IPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/193 ,  G11B5/23 ,  G11B5/251 ,  G11B5/14

CPC分类号： G11B5/133 ,  G11B5/193

摘要： A magnetic head which uses single crystal Mn-Zn ferrite containing up to 7% by weight of SnO.sub.2 occluded therein without being allowed to separate and which has such a construction that glass having a contraction rate lower than that of ferrite is filled in the narrowed portion near the gap, the plane forming the principal magnetic circuit of the core is allowed to coincide with the {110} plane of the ferrite and an angle .theta. between the direction inside the {110} plane of the ferrite and the gap-forming plane is from 5.degree. to 40.degree. or 85.degree. to 120.degree.. The magnetic head having such a construction has a reduced modulation noise and extremely excellent write-and-read characteristics.

摘要翻译： 使用含有高达7重量％的SnO 2的单晶Mn-Zn铁氧体的磁头，其不被分离，并且具有这样的结构，即将收缩率低于铁素体的玻璃填充到变窄部分 在间隙附近，形成芯的主磁路的平面允许与铁素体的{110}平面和铁氧体的{110}平面内的<100>方向之间的角度θ与间隙 - 成型面为5°〜40°或85°〜120°。 具有这种结构的磁头具有降低的调制噪声和极好的写和读特性。