公开(公告)号：US5139865A

公开(公告)日：1992-08-18

申请号：US557840

申请日：1990-07-26

申请人： Hiroo Inaba ,  Kazuaki Taga ,  Toshihiko Miura

发明人： Hiroo Inaba ,  Kazuaki Taga ,  Toshihiko Miura

IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/716 ,  G11B5/73

CPC分类号： G11B5/70 ,  G11B5/70621 ,  G11B5/716 ,  G11B5/738 ,  Y10T428/25 ,  Y10T428/257

摘要： A magnetic recording medium comprising a non-magnetic support having thereon a plurality of magnetic layers each comprising a ferromagnetic powder dispersed in a binder, wherein the layer located within a thickness of 0.5 .mu.m from an uppermost surface of said plurality of magnetic layers and a layer located within a thickness of 0.5 .mu.m above the adjacent non-magnetic support have a higher packing density of ferromagnetic powder than an interlayer interposed therebetween. In a preferred embodiment, the interlayer consists of two layers and there are provided on the non-magnetic support a 1st magnetic layer, a 2nd magnetic layer, a 3rd magnetic layer and a 4th magnetic layer in this order from the non-magnetic support; the sum of the thickness of said 3rd magnetic layer and said 4th magnetic layer being not more than 3.5 .mu.m.

摘要翻译： 一种磁记录介质，包括其上具有多个磁性层的非磁性载体，每个磁性层各自包含分散在粘合剂中的铁磁性粉末，其中位于距所述多个磁性层的最上表面0.5μm的厚度的层和 位于相邻非磁性支撑体上方0.5μm厚度的层具有比夹在其间的夹层更高的铁磁性粉末的堆积密度。 在优选实施例中，中间层由两层组成，非磁性载体上依次设有第一磁性层，第二磁性层，第三磁性层和第四磁性层; 所述第三磁性层和所述第四磁性层的厚度之和不大于3.5μm。

公开(公告)号：US5316845A

公开(公告)日：1994-05-31

申请号：US69681

申请日：1993-06-01

申请人： Masatoshi Takahashi ,  Hiroo Inaba ,  Kazuaki Taga

发明人： Masatoshi Takahashi ,  Hiroo Inaba ,  Kazuaki Taga

IPC分类号： G11B5/708 ,  B32B27/18 ,  B32B33/00 ,  C09C1/48 ,  C09D5/23 ,  C09D7/12 ,  C10M103/02 ,  C10M105/24 ,  C10M105/34 ,  C10M107/50 ,  C10N40/18 ,  C10N70/00 ,  G11B5/71 ,  G11B5/716 ,  G11B5/00

CPC分类号： G11B5/71 ,  G11B5/716 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31663

摘要： A magnetic recording medium comprising a nonmagnetic support and at least two magnetic layers on the support, each magnetic layer containing a ferromagnetic powder and a binder, wherein the lower magnetic layer comprises at least one layer containing a branched fatty acid-modified silicone, but not carbon black, and the upper magnetic layer comprises at least one layer containing a branched fatty acid-modified silicone and carbon black having a DBP absorption oil amount of 100 to 250 ml/100 g. The magnetic recording medium has improved lubricating characteristics.

摘要翻译： 一种包含非磁性载体和载体上的至少两个磁性层的磁记录介质，每个磁性层含有铁磁性粉末和粘合剂，其中下部磁性层包含至少一层含有支链脂肪酸改性硅氧烷但不含 碳黑，上磁性层包含含有支链脂肪酸改性硅氧烷和DBP吸收油量为100〜250ml / 100g的炭黑的至少一层。 磁记录介质具有改善的润滑特性。

公开(公告)号：US5178935A

公开(公告)日：1993-01-12

申请号：US419238

申请日：1989-10-10

申请人： Shinji Saito ,  Hiroshi Ogawa ,  Naoyoshi Chino ,  Hiroo Inaba ,  Kazuaki Taga

发明人： Shinji Saito ,  Hiroshi Ogawa ,  Naoyoshi Chino ,  Hiroo Inaba ,  Kazuaki Taga

IPC分类号： G11B5/716

CPC分类号： G11B5/716 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/265 ,  Y10T428/31609

摘要： A magnetic recording comprising a non-magnetic support having thereon first and second magnetic layers containing a binder and a ferromagnetic powder. In a first embodiment, the content of the binder in each magnetic layer containing a vinyl chloride resin or a cellulose resin is characterized in relation to the quantity of the ferromagnetic powder contained therein. In a second embodiment, each of the magnetic layers is characterized in terms of a difference in glass transition point of a polyurethane resin contained therein. In a third embodiment, each of the magnetic layers is characterized in terms of thickness and polyisocyanate content, wherein the content of the polyisocyanate in the first magnetic layer is at least one part by weight larger than the amount of the polyisocyanate in the second magnetic layer.

摘要翻译： 磁记录包括其上具有包含粘合剂和铁磁性粉末的第一和第二磁性层的非磁性载体。 在第一实施方案中，含有氯乙烯树脂或纤维素树脂的每个磁性层中的粘合剂的含量的特征在于其中所含的铁磁性粉末的量。 在第二实施方案中，每个磁性层的特征在于其中含有的聚氨酯树脂的玻璃化转变点的差异。 在第三实施方案中，每个磁性层的特征在于厚度和多异氰酸酯含量，其中第一磁性层中多异氰酸酯的含量比第二磁性层中的多异氰酸酯的量大至少一个重量份 。

公开(公告)号：US5085915A

公开(公告)日：1992-02-04

申请号：US640512

申请日：1991-01-11

申请人： Kazuaki Taga ,  Takeshi Tsuda ,  Hiroo Inaba ,  Hiroshi Ogawa

发明人： Kazuaki Taga ,  Takeshi Tsuda ,  Hiroo Inaba ,  Hiroshi Ogawa

IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/716 ,  G11B5/73 ,  G11B5/733

CPC分类号： G11B5/716 ,  G11B5/733 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/31786

摘要： A magnetic recording medium which comprises plurality of magnetic layers comprising at least first and second magnetic layers which are successively formed on a surface of a polyethylene terephthalate support, wherein said support contains inert inorganic particles having an average particle size of from 0.5 to 0.7 microns, a standard deviation of 0.1 microns or less and the surface of said support has a center line average roughness (Ra) of 16 nm or less and a density of protrusions (Ds) of 6000/mm.sup.2 or more in the case of protrusions of 0.7 microns of more.

摘要翻译： 一种磁记录介质，其包括至少包含第一和第二磁性层的多个磁性层，所述磁性层依次形成在聚对苯二甲酸乙二醇酯载体的表面上，其中所述载体包含平均粒径为0.5至0.7微米的惰性无机颗粒， 0.1微米或更小的标准偏差，并且在0.7微米的突起的情况下，所述支撑体的表面的中心线平均粗糙度（Ra）为16nm以下，突起的密度（Ds）为6000 / mm2以上 的更多。

公开(公告)号：US5370932A

公开(公告)日：1994-12-06

申请号：US15293

申请日：1993-02-08

申请人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga ,  Keiji Mori

发明人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga ,  Keiji Mori

IPC分类号： G11B5/716 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/73 ,  B32B5/16 ,  G11B5/66

CPC分类号： G11B5/716 ,  Y10T428/12931 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

摘要： A magnetic recording medium excellent in electromagnetic properties is disclosed, which comprises a non-magnetic support and at least two magnetic layers formed thereon, each of which is mainly composed of a magnetic substance and a binder, in which a first magnetic layer (a lower layer) has a coercive force of 450 to 660 Oe, a residual magnetic flux density (Br) of 1,950 gausses or more and a thickness of 1.5 to 5 .mu.m, a second magnetic layer (an upper layer) has a coercive force of 700 to 900 Oe, a residual magnetic flux density of 1,500 gausses or more and a thickness of 1.5 to 3 .mu.m, the difference in coercive force between the first magnetic layer and the second magnetic layer is 150 to less than 300 Oe, the difference in residual magnetic flux density between the first magnetic layer and the second magnetic layer is within 600 gausses, and the total thickness of magnetic layers on the non-magnetic support is 3 to 7 .mu.m.

摘要翻译： 公开了一种电磁特性优异的磁记录介质，其包括非磁性载体和形成在其上的至少两个磁性层，它们各自主要由磁性物质和粘合剂组成，其中第一磁性层 层）的矫顽力为450〜660Oe，剩余磁通密度（Br）为1,950高斯或以上，厚度为1.5〜5μm，第2磁性层（上层）的矫顽力为700 至900Oe，剩余磁通密度为1500高斯或更大，厚度为1.5至3μm，第一磁性层和第二磁性层之间的矫顽力差为150至小于300Oe， 第一磁性层和第二磁性层之间的剩余磁通密度在600高斯内，非磁性载体上的磁性层的总厚度为3〜7μm。

公开(公告)号：US5175048A

公开(公告)日：1992-12-29

申请号：US765740

申请日：1991-09-26

申请人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga

发明人： Hiroo Inaba ,  Masatoshi Takahashi ,  Kazuaki Taga

IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/702 ,  G11B5/716 ,  G11B5/842

CPC分类号： G11B5/702 ,  G11B5/716 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/265

摘要： A magnetic recording medium comprising a non-magnetic support having at least two magnetic layers formed thereon, the at least two magnetic layers being formed by providing, in sequence, a first magnetic layer containing first ferromagnetic powder and a first binder on a surface of the non-magnetic support and then providing a second magnetic layer containing a second binder and second ferromagnetic powder while the first layer is in a wet state, the first magnetic layer containing the first binder in an amount of 10 to 27 parts by weight based on 100 parts by weight of the first ferromagnetic powder, the second magnetic layer containing the second binder in an amount of 14 to 30 parts by weight based on 100 parts by weight of the second ferromagnetic powder, the amount of the first binder contained in the first magnetic layer being smaller than that of the second binder contained in the second magnetic layer with a difference therebetween being from 0.5 to 10 parts by weight, and a ratio (A/B) of a dry thickness (A) of the first magnetic layer to a dry thickness (B) of the second magnetic layer being from 0.5 to 3.2. The magnetic recording medium is excellent in electromagnetic conversion characteristics and running stability.

摘要翻译： 一种磁记录介质，包括其上形成有至少两个磁性层的非磁性载体，所述至少两个磁性层通过依次提供含有第一铁磁性粉末和第一粘结剂的第一磁性层而形成 然后提供包含第二粘合剂和第二铁磁粉末的第二磁性层，同时第一层处于湿润状态，第一磁性层含有基于100的10至27重量份的第一粘合剂 所述第一铁磁粉末的重量份，含有所述第二粘合剂的所述第二磁性层的量为基于100重量份所述第二铁磁粉末为14〜30重量份，所述第一磁性体中含有的所述第一粘合剂的量 层比第二磁性层中包含的第二粘合剂的层小，其间的差值为0.5〜10重量份，并且ra 第一磁性层的干厚度（A）至第二磁性层的干厚度（B）的tio（A / B）为0.5至3.2。 磁记录介质具有优异的电磁转换特性和运行稳定性。

公开(公告)号：US5073406A

公开(公告)日：1991-12-17

申请号：US682767

申请日：1991-04-09

申请人： Masatoshi Takahashi ,  Hiroo Inaba ,  Kazuaki Taga

发明人： Masatoshi Takahashi ,  Hiroo Inaba ,  Kazuaki Taga

IPC分类号： G11B5/716 ,  G11B5/842

CPC分类号： G11B5/716 ,  G11B5/842

摘要： A method of producing a magnetic recording medium comprises the steps of kneading and dispersing ferromagnetic powder, binder and non-ferromagnetic powder to obtain magnetic coating solutions, and applying a plurality of the magnetic coating solutions on a non-ferromagnetic substrate to form a plurality of magnetic layers on the substrate. In the kneading and dispersing step, a magnetic coating composition containing a ferromagnetic powder and a solvent of 15 to 30 wt % of the ferromagnetic powder is kneaded by a two-shaft continuous kneading and mixing machine and then dispersed by a pin type sand grinder to obtain a first magnetic solution. Another magnetic coating composition containing a ferromagnetic powder and a solvent of 30 to 50 wt % of the ferromagnetic powder is kneaded by a double-arm open kneader and then dispersed by a pin type sand grinder, and finally dispersed by a disk type sand grinder to obtain a second magnetic coating solution. In the magnetic solution applying step, the first magnetic coating solution is at first applied on said substrate and then the second magnetic coating solution is applied thereon.

摘要翻译： 一种制造磁记录介质的方法包括以下步骤：将铁磁性粉末，粘合剂和非铁磁性粉末混合和分散以获得磁性涂层溶液，并将多个磁性涂覆溶液施加在非铁磁性基底上以形成多个 基底上的磁性层。 在捏合分散工序中，将含有铁磁性粉末和15〜30重量％的铁磁粉末的溶剂的磁性涂料组合物通过双轴连续捏合混合机进行混炼，然后用针式砂磨机分散 获得第一磁性溶液。 含有铁磁性粉末和铁磁性粉末的含量为30〜50重量％的溶剂的磁性涂料组合物用双臂开口捏合机捏合，然后用针式砂磨机分散，最后用盘式砂磨机分散 获得第二磁性涂层溶液。 在磁性溶液涂布步骤中，首先将第一磁性涂布溶液涂布在所述基材上，然后将第二磁性涂布液涂布在其上。

公开(公告)号：US20060016703A1

公开(公告)日：2006-01-26

申请号：US11185866

申请日：2005-07-21

申请人： Daisuke Sato ,  Kazuaki Taga

发明人： Daisuke Sato ,  Kazuaki Taga

IPC分类号： B65D85/30

CPC分类号： G11B33/0422

摘要： A case for storing a recording medium disk such as a CD is provided which has a feature that an opening portion thereof is readily recognizable to users and the case can be easily opened. A case (1) has engaging elements (21, 31) respectively integrally formed with a case body (2) and a cover (3) at a corner region of the case that is located opposite an edge of the case (1) along which a hinge portion (10) is provided. The engaging elements (21, 31) cooperatively serve to lock the cover (3) to the case body (2) in its closed condition by elastic mutual engagement, and cooperatively serve to unlock the cover (3) from the case body (2) when the engaging elements (21, 31) undergo a twisting operation by user's fingers such as a thumb and a forefinger.

摘要翻译： 提供了用于存储诸如CD的记录介质盘的壳体，其特征在于，其开口部分易于被用户识别，并且壳体可以容易地打开。 壳体（1）具有分别与壳体（2）整体形成的接合元件（21,31）和位于壳体的与壳体（1）的边缘相对的拐角区域处的覆盖物（3）， 提供铰链部分（10）。 接合元件（21,31）协同地用于通过弹性相互接合将盖（3）锁定在封闭状态下，并且协同地用于将盖（3）从壳体（2）解锁， 当接合元件（21,31）经过诸如拇指和食指等使用者的手指进行扭转操作时。

公开(公告)号：US06461711B1

公开(公告)日：2002-10-08

申请号：US09614456

申请日：2000-07-12

申请人： Toshio Ishida ,  Kazuaki Taga ,  Yoshihisa Usami

发明人： Toshio Ishida ,  Kazuaki Taga ,  Yoshihisa Usami

IPC分类号： B32B302

CPC分类号： G11B7/252 ,  G11B7/246 ,  G11B7/2463 ,  G11B7/2472 ,  G11B7/2475 ,  G11B7/2478 ,  G11B7/248 ,  G11B7/249 ,  G11B7/2534 ,  G11B7/2595 ,  Y10T428/21

摘要： An optical information recording medium. A light reflecting layer 14 is provided on a transparent substrate 12 which is provided with a recording portion on which information which can be played-back by laser light is recorded. A stabilization layer 16 is formed from a material of a density of 1.4 to 4.2 g/cm3, and is provided such that a center of gravity of the optical information recording medium is included within a range of 15% of a radius r of the optical information recording medium from a center C of the optical information recording medium.

摘要翻译： 光信息记录介质。 光反射层14设置在透明基板12上，透明基板12上设置有记录有能够通过激光回放的信息的记录部。 稳定层16由密度为1.4〜4.2g / cm 3的材料形成，并且设置为使光信息记录介质的重心包含在光学信息记录介质的半径r的15％的范围内 信息记录介质从光信息记录介质的中心C。

公开(公告)号：US07353942B2

公开(公告)日：2008-04-08

申请号：US11184998

申请日：2005-07-20

申请人： Sunhee Lee ,  Kazuaki Taga ,  Yosuke Sumiya

发明人： Sunhee Lee ,  Kazuaki Taga ,  Yosuke Sumiya

IPC分类号： B65D85/57 ,  B65D71/00

CPC分类号： G11B33/0427 ,  Y10S206/804 ,  Y10S206/815

摘要： Insertion and removal of an index, which is interposed between a disk tray and a case half in which the disk tray is fitted, is facilitated in a disk housing case. The disk housing case is constituted by a disk tray and a first and a second case half for housing the disk tray. The index is interposed between the disk tray and the second case half. An index opening is provided at an end at which the case halves are linked, or at an end opposite the linked end. Contact openings, for enabling a finger or an index sliding member to contact the index to insert and remove the index, are provided in at least one of the disk tray and the second case half.

摘要翻译： 介于盘托盘和其中安装有盘托架的壳体半部之间的索引的插入和移除在盘容纳壳体中是便利的。 盘壳体由盘托盘和用于容纳盘托盘的第一和第二壳体半部构成。 索引位于盘托盘和第二壳体半部之间。 在壳体一半连接的端部处或在与连接端相对的端部处设置有引导开口。 提供在盘托盘和第二壳体半部中的至少一个中的用于使手指或索引滑动构件接触索引以插入和移除索引的接触开口。