公开(公告)号：US5547704A

公开(公告)日：1996-08-20

申请号：US300542

申请日：1994-09-06

申请人： Yasuo Nagashima ,  Ryuji Shirahata

发明人： Yasuo Nagashima ,  Ryuji Shirahata

IPC分类号： G11B5/716 ,  C09D5/23 ,  C09D7/12 ,  G11B5/73 ,  G11B5/82 ,  G11B5/842 ,  B05D5/12

CPC分类号： G11B5/716 ,  G11B5/825

摘要： A flexible magnetic disk has a first magnetic layer formed on a first surface of a circular polymeric substrate by coating and drying a magnetic coating material. After the first magnetic layer is formed and dried, a second magnetic layer is formed on a second surface of the polymeric substrate by coating and drying the magnetic coating material. The second magnetic layer formed on the second surface is then calendered to form a magnetic recording surface. The resulting magnetic disk provides for an improved surface vibration during high-speed rotation of the disk, and provides very good head touch.

摘要翻译： 柔性磁盘具有通过涂覆和干燥磁性涂层材料形成在圆形聚合物基底的第一表面上的第一磁性层。 在第一磁性层形成和干燥之后，通过涂覆和干燥磁性涂层材料，在聚合物基底的第二表面上形成第二磁性层。 然后形成在第二表面上的第二磁性层被压延以形成磁记录表面。 所得到的磁盘提供了在盘的高速旋转期间改进的表面振动，并且提供非常好的头部触感。

公开(公告)号：US5191497A

公开(公告)日：1993-03-02

申请号：US935355

申请日：1992-08-28

申请人： Hitoshi Saito ,  Yasuo Nagashima ,  Toshihiko Matsuo ,  Takashi Matsumoto

发明人： Hitoshi Saito ,  Yasuo Nagashima ,  Toshihiko Matsuo ,  Takashi Matsumoto

IPC分类号： G11B17/32

CPC分类号： G11B17/32

摘要： In a magnetic disk pack comprising a protective casing rotatably accommodating a flexible magnetic disk thereinside and having a pair of aligned windows formed at corresponding positions respectively so that a magnetic head can be inserted into one of the windows to be brought into sliding contact with the magnetic disk under rotation thereby recording and reproducing picture information on and from the magnetic disk, an inclined surface making an angle with the free rotation plane of the magnetic disk is provided on an inner part of the marginal edge of at least one of the windows or on a member resiliently supported at that position thereby inducing a positive pressure or a negative pressure between the rotating magnetic disk and the inclined surface depending on the direction of rotation of the magnetic disk. Such a positive pressure or negative pressure is utilized to urge or attract the magnetic disk toward and onto the magnetic head so as to ensure satisfactory head touch. In a mangetic disk recording/reproducing apparatus in which magnetic heads are inserted into such a magnetic disk pack, and a magnetic disk is rotated in one direction and the other by a reversible spindle motor, an inclined surface making an angle with the free rotation plane of the magnetic disk is provided on each of control members inserted into the windows of the magnetic disk pack together with the magnetic heads so as to similarly ensure satisfactory head touch.

摘要翻译： 在一个磁盘组件中，包括一个可旋转地容纳其内部的柔性磁盘的保护壳体，并具有分别形成在相应位置上的一对对准的窗口，使得一个磁头可以被插入一个窗口以与磁体 盘旋转，从而在磁盘上记录和再现图像信息，与至少一个窗口的边缘的内部部分上设置与磁盘的自由旋转平面成一定角度的倾斜表面，或者在 弹性地支撑在该位置处的构件，由此根据磁盘的旋转方向在旋转磁盘和倾斜表面之间引起正压或负压。 利用这种正压或负压将磁盘推向或吸引到磁头上，以确保令人满意的头部接触。 在其中磁头被插入这样的磁盘盒中并且磁盘通过可逆主轴电动机在一个方向上彼此旋转并且与自由旋转平面成一定角度的倾斜表面的一个装配盘记录/再现装置中 的磁盘被设置在与磁头一起插入到磁盘盒的窗口中的每个控制构件上，以类似地确保令人满意的头部接触。

公开(公告)号：US5178925A

公开(公告)日：1993-01-12

申请号：US609844

申请日：1990-11-07

申请人： Yasushi Endo ,  Mikihiko Kato ,  Yasuo Nagashima ,  Toshio Kawamata

发明人： Yasushi Endo ,  Mikihiko Kato ,  Yasuo Nagashima ,  Toshio Kawamata

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/702 ,  G11B5/706 ,  G11B5/712 ,  G11B5/714

CPC分类号： G11B5/706 ,  G11B5/7022 ,  G11B5/712 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/2991 ,  Y10T428/3158 ,  Y10T428/31591 ,  Y10T428/31609 ,  Y10T428/31935

摘要： A magnetic disc having excellent running durability is disclosed, which comprises a non-magnetic support and a magnetic layer on the non-magnetic support, the layer being composed mainly of a ferromagnetic metal powder and a binder resin, wherein the ferromagnetic metal powder has a pH value of less than 7.0 and a specific surface area as determined by the BET method of at least 40 m.sup.2 /g, and the glass transition temperature of the magnetic layer is at least 75.degree. C.

摘要翻译： 公开了一种具有优异的运行耐久性的磁盘，其包括非磁性支撑件和非磁性支撑件上的磁性层，该层主要由铁磁金属粉末和粘合剂树脂组成，其中铁磁性金属粉末具有 pH值小于7.0，BET法测定的比表面积为40m 2 / g以上，磁性层的玻璃化转变温度为75℃以上。

公开(公告)号：US5045372A

公开(公告)日：1991-09-03

申请号：US466809

申请日：1990-01-18

申请人： Yasushi Endo ,  Mikihiko Kato ,  Yasuo Nagashima ,  Yasuyuki Yamada

发明人： Yasushi Endo ,  Mikihiko Kato ,  Yasuo Nagashima ,  Yasuyuki Yamada

IPC分类号： G11B5/71 ,  G11B5/714

CPC分类号： G11B5/71 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/2982

摘要： A magnetic recording medium having on a non-magnetic support a magnetic layer mainly composed of a ferromagnetic metal powder and a binder resin is disclosed, wherein the specific surface area S (m.sup.2 /g) of the ferromagnetic metal powder is from 30 to 65 and the magnetic layer further contains a fatty acid ester in a content Y (% by weight) to the ferromagnetic metal powder of the range of 0.05S+5.5.ltoreq.Y.ltoreq.-0.2S+24 when the specific surface area S is from 30 to less than 50 and the range of 0.06S+4.7.ltoreq.Y.ltoreq.-0.13S+21 when the specific surface area S is from 50 to 65. The magnetic recording medium is suitable for high density recording and exhibits excellent running durability.

摘要翻译： 公开了一种磁性记录介质，其特征在于，磁性金属粉末的比表面积S（m 2 / g）为30〜65，非磁性载体为主要由强磁性金属粉末和粘结剂树脂构成的磁性层， 磁性层还含有当比表面积S为0.05S +5.5≤X≤0.2S+ 24范围的铁磁性金属粉末的含量Y（重量％）的脂肪酸酯 当比表面积S为50至65时，从30至小于50，且0.06S + 4.7

公开(公告)号：US4984121A

公开(公告)日：1991-01-08

申请号：US302296

申请日：1989-01-27

申请人： Yasuo Nagashima

发明人： Yasuo Nagashima

IPC分类号： G11B17/32

CPC分类号： G11B17/32

摘要： A magnetic recording/reproduction apparatus using a magnetic head in sliding contact with a flexible magnetic disk for recording and reproduction, which has a negative pressure generating member disposed at the upstream side of the magnetic head and at the same side of the magnetic head with respect to the flexible magnetic disk, having an inclined surface inclined to be farther from the flexible magnetic disk towards the downstream side, and a positive pressure generating member disposed at the downstream side of the magnetic head and at the opposite side of the magnetic head with respect to the flexible magnetic disk, having an inclined surface inclined to be closer to the flexible magnetic disk towards the downstream side, the rotating flexible magnetic disk being attracted by the negative pressure and urged by the possible pressure to achieve stable sliding contact with the magnetic head.

摘要翻译： 一种磁记录/再现装置，其使用与用于记录和再现的柔性磁盘滑动接触的磁头，该磁性记录/再现装置具有设置在磁头的上游侧和与磁头相同侧的负压产生件， 具有从柔性磁盘向下游侧倾斜的倾斜表面的柔性磁盘以及设置在磁头的下游侧和磁头的相反侧的正压产生件，相对于 对于柔性磁盘，具有朝向下游侧更靠近柔性磁盘的倾斜表面，旋转的柔性磁盘被负压吸引并被可能的压力推压以实现与磁头的稳定的滑动接触 。

公开(公告)号：US5051287A

公开(公告)日：1991-09-24

申请号：US424445

申请日：1989-10-20

申请人： Yasuyuki Yamada ,  Mikihiko Kato ,  Yasuhi Endo ,  Masaya Kojima ,  Yasuo Nagashima

发明人： Yasuyuki Yamada ,  Mikihiko Kato ,  Yasuhi Endo ,  Masaya Kojima ,  Yasuo Nagashima

IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/706 ,  G11B5/714 ,  G11B5/82

CPC分类号： G11B5/714 ,  G11B5/70605 ,  Y10S428/90 ,  Y10T428/31609

摘要： A magnetic disk comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic metal powder and a binder resin, wherein the magnetic layer has a mechanical loss tangent, tan .delta., of from 8.times.10.sup.-3 to 6.times.10.sup.-2, measured at a frequency of 110 Hz and in a temperature range of from 20.degree. to 50.degree. C. with a temperature increase rate of 2 deg/min.

摘要翻译： 一种磁盘，其包括非磁性载体，其上设置有包含铁磁性金属粉末和粘合剂树脂的磁性层，其中磁性层具有8×10 -3至6×10 -2的机械损耗角正切，tanδ，频率 为110Hz，温度范围为20〜50℃，升温速度为2℃/分钟。

公开(公告)号：US5018257A

公开(公告)日：1991-05-28

申请号：US505087

申请日：1990-04-05

申请人： Yasuo Nagashima ,  Haruo Soeda ,  Masamichi Sato ,  Takashi Kubo

发明人： Yasuo Nagashima ,  Haruo Soeda ,  Masamichi Sato ,  Takashi Kubo

IPC分类号： B24B1/00 ,  B24B31/112

CPC分类号： B24B31/112 ,  B24B1/005 ,  Y10T29/47 ,  Y10T407/10 ,  Y10T82/11

摘要： A magnetic sheet polishing device including a scraper having a sliding surface and a downstream side surface that is nearly perpendicular or at an acute angle to the sliding surface to ensure that magnetic material powder spontaneously falls away from and does not adhere again to the magnetic material surface of the magnetic sheet after being scraped off by the scraper. Additionally, the scraper has a diagonal groove or a diagonal step formed in a side surface to check for wear of the sliding surface.

公开(公告)号：US4976020A

公开(公告)日：1990-12-11

申请号：US398303

申请日：1989-08-24

申请人： Yasuo Nagashima ,  Haruo Soeda ,  Masamichi Sato ,  Takashi Kubo

发明人： Yasuo Nagashima ,  Haruo Soeda ,  Masamichi Sato ,  Takashi Kubo

IPC分类号： B24B1/00 ,  B24B31/112

CPC分类号： B24B31/112 ,  B24B1/005 ,  Y10T29/47 ,  Y10T407/10 ,  Y10T82/11

摘要： A magnetic sheet polishing device including a scraper having a sliding surface and a downstream side surface that is nearly perpendicular or at an acute angle to the sliding surface to ensure that magnetic material powder spontaneously falls away from and does not adhere again to the magnetic material surface of the magnetic sheet after being scraped off by the scraper. Additionally, the scraper has a diagonal groove or a diagonal step formed in a side surface to check for wear of the sliding surface.

摘要翻译： 一种磁性片材抛光装置，包括具有滑动表面和与滑动表面几乎垂直或成锐角的下游侧表面的刮刀，以确保磁性材料粉末自发地脱离并且不再粘附到磁性材料表面 被刮刀刮掉后的磁性片。 此外，刮刀具有形成在侧表面中的对角槽或对角台阶，以检查滑动表面的磨损。

公开(公告)号：US4661871A

公开(公告)日：1987-04-28

申请号：US613065

申请日：1984-05-22

申请人： Yasuo Nagashima

发明人： Yasuo Nagashima

IPC分类号： G11B17/34 ,  G11B5/82 ,  G11B17/32 ,  G11B5/016 ,  G11B5/012 ,  G11B5/54 ,  G11B23/03

CPC分类号： G11B5/825 ,  G11B17/32

摘要： A guide system is used with a rotary magnetic recording sheet applicable to a system and method which includes a regulator plate and performs magnetic recording or playback by protruding a magnetic head beyond a regulation level of a recording surface of a rotatable sheet of magnetic recording medium. The regulator plate is located to contact the back surface of the magnetic recording medium and held in such a relative position to the recording medium that the regulation level of the recording surface of the recording medium is protruded toward the recording surface beyond a non-regulation level of the recording surface.

摘要翻译： 引导系统与适用于包括调节板的系统和方法的旋转磁记录片一起使用，并通过将磁头突出超过可旋转的磁记录介质的记录表面的调节水平来执行磁记录或重放。 调节板被定位成接触磁记录介质的背面并保持在与记录介质相对的相对位置，使得记录介质的记录表面的调节水平朝向记录表面突出超过非调节水平 的记录表面。

公开(公告)号：US4646179A

公开(公告)日：1987-02-24

申请号：US613066

申请日：1984-05-22

申请人： Yasuo Nagashima ,  Akira Kasuga

发明人： Yasuo Nagashima ,  Akira Kasuga

IPC分类号： G11B5/73 ,  G11B5/82 ,  G11B5/016 ,  G11B5/012 ,  G11B5/54 ,  G11B23/03

CPC分类号： G11B5/825 ,  Y10T428/265 ,  Y10T428/31518

摘要： A flexible magnetic disc for use in combination with a magnetic head assembly which includes a regulator plate and performs magnetic recording or playback by protruding a magnetic head beyond a predetermined support level of a rotatable sheet of magnetic recording medium at least by an amount which is substantially equal to a total thickness of the recording medium. Assuming that the recording medium has a total thickness of t millimeters (mm) and a Young's modulus of E grams per square millimeter (g/mm.sup.2), a product of the Youngs's modulus E and the third power of the total thickness t, i.e. Et.sup.3, lies in a range between a lower limit of 2.5 g.mm and an upper limit of 36 g.mm inclusive of the lower and upper limits.

摘要翻译： 一种用于与磁头组件组合使用的柔性磁盘，磁头组件包括调节板，并通过将磁头突出超过可旋转的磁性记录介质片的预定支撑水平来进行磁记录或重放，至少基本上 等于记录介质的总厚度。 假设记录介质具有t毫米（mm）的总厚度和E克/平方毫米（g / mm 2）的杨氏模量，杨氏模量E与总厚度t的第三功率的乘积即Et 3 位于2.5g.mm的下限和36g.mm的上限（包括下限和上限）之间的范围内。