公开(公告)号：US4666773A

公开(公告)日：1987-05-19

申请号：US585023

申请日：1984-03-05

申请人： Tatsuji Kitamoto ,  Goro Akashi

发明人： Tatsuji Kitamoto ,  Goro Akashi

IPC分类号： G11B5/70 ,  G11B5/845 ,  G11B5/852 ,  H01F10/02

CPC分类号： G11B5/70 ,  G11B5/845 ,  G11B5/852 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/31678

摘要： In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a binder, the ferromagnetic particles are given a magnetic anisotropy by a magnetic annealing treatment and the direction of the magnetic anisotropy is vertical mainly to the recording surface. Thus, the vertical magnetization recording is improved.

摘要翻译： 在包含非磁性载体和涂覆有磁性体的磁记录层的磁记录介质中，铁磁颗粒分散在粘合剂中，铁磁颗粒通过磁性退火处理被赋予磁各向异性，并且磁各向异性方向垂直 主要是记录面。 因此，提高了垂直磁化记录。

公开(公告)号：US4520069A

公开(公告)日：1985-05-28

申请号：US375691

申请日：1982-05-06

申请人： Tatsuji Kitamoto ,  Goro Akashi

发明人： Tatsuji Kitamoto ,  Goro Akashi

IPC分类号： G11B5/706 ,  C09D5/23 ,  C09D7/12 ,  G11B5/714 ,  G11B5/845 ,  G11B5/852 ,  G11B5/70 ,  B32B5/30

CPC分类号： G11B5/714 ,  G11B5/845 ,  G11B5/852 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

摘要： In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a non-magnetic binder, an improvement consists in that the ferromagnetic particles have a mean particle length of at most 0.3 microns with a length to width ratio of more than 1 but at most 3 and optionally are subjected to an orientation treatment in a magnetic field in the vertical direction to the recording surface.

摘要翻译： 在包含非磁性载体和涂覆有磁性颗粒的非磁性粘结剂中的磁记录层的磁记录介质中，其改进在于，铁磁性颗粒的平均颗粒长度至多为0.3微米， 长宽比大于1但大于3，并且任选地在与记录表面垂直的方向上的磁场中进行取向处理。

公开(公告)号：US4450199A

公开(公告)日：1984-05-22

申请号：US251826

申请日：1981-04-07

申请人： Eiichi Tadokoro ,  Masaaki Fujiyama ,  Goro Akashi

发明人： Eiichi Tadokoro ,  Masaaki Fujiyama ,  Goro Akashi

IPC分类号： G11B5/70 ,  B32B3/10

CPC分类号： G11B5/70 ,  Y10S428/90 ,  Y10T428/249986 ,  Y10T428/31551 ,  Y10T428/31565 ,  Y10T428/31884 ,  Y10T428/31935

摘要： A magnetic recording medium is disclosed which comprises a nonmagnetic support and a magnetic layer formed thereon, said magnetic layer having a center-line average surface roughness of not more than 2.1.times.10.sup.-2 .mu. and at least one property selected from an average pore size of at least 500 .ANG. and a porosity of at least 30%.

摘要翻译： 公开了一种磁记录介质，其包括非磁性载体和形成在其上的磁性层，所述磁性层的中心线平均表面粗糙度不大于2.1×10-2μm，并且至少一种性质选自平均孔径 至少500 ANGSTROM，孔隙率至少为30％。

公开(公告)号：US4391851A

公开(公告)日：1983-07-05

申请号：US353791

申请日：1982-03-02

申请人： Yasuyuki Yamada ,  Goro Akashi ,  Nobuo Tsuji ,  Yoshito Mukaida ,  Masaaki Fujiyama

发明人： Yasuyuki Yamada ,  Goro Akashi ,  Nobuo Tsuji ,  Yoshito Mukaida ,  Masaaki Fujiyama

IPC分类号： G11B5/842 ,  G11B5/702 ,  G11B5/84 ,  H01F10/02

CPC分类号： G11B5/84 ,  G11B5/7021

摘要： A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.

摘要翻译： 公开了一种制造磁记录介质的方法。 该方法包括用含有细铁磁颗粒的磁性涂层溶液和包含硝化纤维素，多元醇和具有至少两个异氰酸酯基的异氰酸酯的粘合剂涂覆非磁性碱。 在该方法中，将磁性层中的残留溶剂的0.3〜3重量％的纤维网压延，然后将压延纤维网彻底干燥。

公开(公告)号：US4135032A

公开(公告)日：1979-01-16

申请号：US835376

申请日：1977-09-21

申请人： Goro Akashi ,  Masaaki Fujiyama ,  Yasuyuki Yamada

发明人： Goro Akashi ,  Masaaki Fujiyama ,  Yasuyuki Yamada

IPC分类号： G11B5/70 ,  G11B5/735 ,  G11B5/78

CPC分类号： G11B5/70 ,  G11B5/735 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/258 ,  Y10T428/265

摘要： A magnetic recording medium comprising a non-magnetizable plastic film support having a magnetic recording layer on one side thereof and, on the other side thereof, a layer containing (1) at least one powder of carbon black or graphite, and (2) at least one powder of a white pigment or a light colored pigment, and (3) a binder, powders (1) and (2) forming divided color areas in the back surface layer, and the back surface layer having a surface electrical resistance below 1 .times. 10.sup.10 ohm/cm.sup.2.

公开(公告)号：US4117190A

公开(公告)日：1978-09-26

申请号：US516315

申请日：1974-10-21

申请人： Goro Akashi ,  Osamu Suzuki ,  Masaaki Fujiyama

发明人： Goro Akashi ,  Osamu Suzuki ,  Masaaki Fujiyama

IPC分类号： G11B5/708 ,  G11B5/72 ,  H01F10/06

CPC分类号： G11B5/72 ,  G11B5/708 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/252 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259

摘要： By incorporating 5 to 15 parts by weight of a finely divided powder having high hardness and a particle size of less than 10.mu. with 100 parts by weight of graphite powder with 20 to 50 parts by weight of a binder in a graphite layer of a magnetic recording medium which comprises a support, a magnetizable layer and a graphite layer provided on the opposite side of the support from the magnetizable layer, a reduction in the abrasion and the destruction of the graphite layer during running can be reduced.

公开(公告)号：US4002804A

公开(公告)日：1977-01-11

申请号：US600689

申请日：1975-07-31

申请人： Goro Akashi ,  Masaaki Fujiyama ,  Nobutaka Yamaguchi ,  Satoru Takayama ,  Koji Sasazawa

发明人： Goro Akashi ,  Masaaki Fujiyama ,  Nobutaka Yamaguchi ,  Satoru Takayama ,  Koji Sasazawa

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/714 ,  B23B15/00

CPC分类号： G11B5/714 ,  G11B5/706 ,  G11B5/70694 ,  Y10S428/90 ,  Y10T428/24975

摘要： A magnetic recording material which comprises a support having thereon a magnetic recording layer comprising a ferromagnetic substance and a binder, wherein the ferromagnetic substance comprises a mixture of (1) a Berthollide iron oxide having a particle size of about 0.5 .mu. or larger and a degree of oxidation represented by the value of x in FeO.sub.x of 1.33

摘要翻译： 一种磁记录材料，包括其上具有包含铁磁性物质和粘合剂的磁记录层的载体，其中所述铁磁性物质包含（1）粒径为约0.5μm或更大的Berthollide氧化铁和 的FeOx中的x值为1.33

公开(公告)号：US4678682A

公开(公告)日：1987-07-07

申请号：US496734

申请日：1983-05-20

申请人： Takamitsu Asai ,  Goro Akashi ,  Tatsuji Kitamoto ,  Hiroshi Chikamasa ,  Tsunehiko Sato

发明人： Takamitsu Asai ,  Goro Akashi ,  Tatsuji Kitamoto ,  Hiroshi Chikamasa ,  Tsunehiko Sato

IPC分类号： G11B5/845 ,  B05D3/14

CPC分类号： G11B5/845

摘要： The perpendicular magnetic orientation of a magnetic layer containing platelet-form ferromagnetic particles coated on a web support is effectively performed by passing a web having thereon the coated magnetic layer in an undried state through a magnetic field formed by plural pairs of opposite pole type magnets disposed in the travelling direction of the web with a gap between adjacent pairs of magnets, while supplying drying air through each gap onto the surface of the travelling web to substantially complete the drying of the coated layer while the web is in the magnetic field. A partition may be inserted in each gap so that the lower end of the partition is close to the upper surface of the travelling web to divide the gap into a front section and a back section, and the drying air may be passed through these sections.

摘要翻译： 通过使其上具有涂覆的磁性层的卷材在未干燥状态下通过由多对成对的相对极型磁体形成的磁场而使包含在片状载体上的含有片状铁磁颗粒的磁性层的磁性层的垂直磁性取向 在相邻成对的磁体之间具有间隙的幅材的行进方向上，同时通过每个间隙将干燥空气提供到行进幅材的表面上，以在幅材处于磁场的同时基本上完成涂覆层的干燥。 可以在每个间隙中插入隔板，使得隔板的下端靠近行进网的上表面，以将间隙分成前部和后部，并且干燥空气可以通过这些部分。

公开(公告)号：US4546725A

公开(公告)日：1985-10-15

申请号：US587421

申请日：1984-03-08

申请人： Ryuji Shirahata ,  Masaru Sekine ,  Goro Akashi

发明人： Ryuji Shirahata ,  Masaru Sekine ,  Goro Akashi

IPC分类号： C23C14/00 ,  C23C14/24 ,  C23C14/56 ,  G11B5/84 ,  G11B5/85 ,  H01F41/20

CPC分类号： C23C14/562 ,  G11B5/84 ,  G11B5/85

摘要： A magnetic recording medium manufacturing apparatus is comprised of a cooling rotary cylinder can and a small roller, arranged adjacent to each other. A flexible endless belt is laid over the can and roller and carries a tape-shaped support. A ferromagnetic material, evaporated from an evaporation source disposed below the can and roller, is vacuum-deposited onto the tape-shaped support.

摘要翻译： 磁记录介质制造装置由彼此相邻布置的冷却旋转圆筒罐和小辊构成。 柔性环形带被放置在罐和辊上并且携带带状支撑件。 从设置在罐和辊下方的蒸发源蒸发的铁磁材料被真空沉积到带状支撑件上。

公开(公告)号：US4543275A

公开(公告)日：1985-09-24

申请号：US532817

申请日：1983-09-16

申请人： Goro Akashi ,  Akira Nahara ,  Yoshihiro Arai

发明人： Goro Akashi ,  Akira Nahara ,  Yoshihiro Arai

IPC分类号： B05D1/28 ,  B05D7/24 ,  C08J7/06 ,  C23C14/12 ,  C23C14/24 ,  C23C14/56 ,  G11B5/64 ,  G11B5/72 ,  G11B5/851

CPC分类号： B05D1/60 ,  C23C14/12 ,  C23C14/24 ,  C23C14/562 ,  G11B5/72 ,  G11B5/851 ,  B05D1/286 ,  B05D2252/02

摘要： A process for forming a vapor-deposited thin layer of organic material is disclosed. The process involves placing organic material on a support base within a vacuum chamber and providing a heat source in the vicinity of the organic material. A second support base is then provided within the vacuum chamber and heat is applied to the organic material at a temperature which causes the organic material to form vapors. The vapors are vapor-deposited on the second support base forming the thin layer of organic material. It is generally desirable to move both of the support bases during the vapor deposition process allowing the formation of a continuous uniform thin layer of organic material.

摘要翻译： 公开了一种用于形成气相沉积的有机材料薄层的方法。 该方法包括将有机材料放置在真空室内的支撑基底上，并在有机材料附近提供热源。 然后在真空室内提供第二支撑底座，并且在使有机材料形成蒸气的温度下将热量施加到有机材料上。 蒸汽蒸发沉积在形成有机材料薄层的第二支撑基底上。 通常期望在气相沉积过程中移动两个支撑基底，从而形成连续均匀的有机材料薄层。