公开(公告)号：US5284716A

公开(公告)日：1994-02-08

申请号：US573115

申请日：1990-09-05

申请人： Yasushi Nakano ,  Yoshitaka Yasufuku ,  Noboru Koyama ,  Masahiro Umemura ,  Takemasa Namiki ,  Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takeshi Nakajima

发明人： Yasushi Nakano ,  Yoshitaka Yasufuku ,  Noboru Koyama ,  Masahiro Umemura ,  Takemasa Namiki ,  Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takeshi Nakajima

IPC分类号： G11B5/706 ,  G11B5/712 ,  G11B5/714 ,  G11B5/716 ,  B32B5/16 ,  G11B5/66

CPC分类号： G11B5/716 ,  G11B5/706 ,  G11B5/712 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/265

摘要： A magnetic recording medium is disclosed which comprises a first magnetic layer on a nonmagnetic support and a second magnetic layer on the first magnetic layer.The first magnetic layer contains A parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, and the second magnetic layer contains B parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, wherein A is smaller than B.This magnetic recording medium is characterized in that: the magnetic recording medium does not stain the conveyance rollers in the manufacturing process; problems which tend to occur when running conventional tapes are greatly reduced; and it is suitable for use as a video tape.

摘要翻译： PCT No.PCT / JP90 / 00060 Sec。 371 1990年9月5日第 102（e）1990年9月5日PCT PCT 1990年1月19日PCT公布。 出版物WO90 / 08380 日本1990年7月26日。公开了一种磁记录介质，其包括在非磁性载体上的第一磁性层和第一磁性层上的第二磁性层。 相对于每100重量份的磁性材料，第一磁性层含有A重量份的Si和Al中的至少一种，第二磁性层包含B重量份的Si和Al中的至少一种，相对于每100重量份的 磁性材料，其中A小于B.该磁记录介质的特征在于：磁记录介质在制造过程中不会污染输送辊; 运行常规磁带时倾向于发生的问题大大减少; 并且它适合用作录像带。

公开(公告)号：US5186754A

公开(公告)日：1993-02-16

申请号：US505937

申请日：1990-04-06

申请人： Masahiro Umemura ,  Takemasa Namiki ,  Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takeshi Nakajima

发明人： Masahiro Umemura ,  Takemasa Namiki ,  Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takeshi Nakajima

IPC分类号： B05C5/02 ,  B05C9/06 ,  B05D1/26 ,  G11B5/716 ,  G11B5/848

CPC分类号： B05C9/06 ,  B05C5/0254 ,  G11B5/716 ,  G11B5/848

摘要： An extruder for coating magnetic layers onto electro-magnetic recording tape is disclosed, which is provided with two reservoirs and two outlet channels so as to permit simultaneous coating of two layers. The two outlet channels meet at an angle and merge into a single outlet channel, which extrudes the two layers between a front edge and a rear edge. The front edge has a shape of curvature, and the rear edge protrudes beyond a tangential line drawn from the end of the front edge curvature. The extruder is capable of producing double layered magnetic tape with or without a mixed zone between layers.

摘要翻译： 公开了一种用于将磁性层涂覆到电磁记录带上的挤出机，其具有两个储存器和两个出口通道，以允许同时涂覆两层。 两个出口通道以一定角度相遇并且合并成单个出口通道，其在前边缘和后边缘之间挤压两层。 前边缘具有曲率形状，并且后边缘突出超过从前边缘曲率的端部拉出的切线。 挤出机能够生产具有或不具有层之间的混合区的双层磁带。

公开(公告)号：US5097792A

公开(公告)日：1992-03-24

申请号：US490742

申请日：1990-03-08

申请人： Masahiro Umemura ,  Setsuko Kawahara ,  Takemasa Namiki ,  Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takeshi Nakajima ,  Yasushi Nakano ,  Noboru Koyama

发明人： Masahiro Umemura ,  Setsuko Kawahara ,  Takemasa Namiki ,  Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takeshi Nakajima ,  Yasushi Nakano ,  Noboru Koyama

IPC分类号： B05C5/02 ,  B05C9/06 ,  G03C1/74 ,  G11B5/716 ,  G11B5/848

CPC分类号： B05C9/06 ,  B05C5/0254 ,  G03C1/74 ,  G11B5/716 ,  G11B5/848 ,  G03C2001/7407 ,  G03C2001/7459 ,  G03C2001/7466

摘要： A coating apparatus having a first slot between its front and center edges and a second slot between its center and back edges, wherein a coating solution is extruded continuously from each of the slots onto the surface of a flexible support running continuously along the edge surfaces of the front, center, and back edges in that order.The front edge surface has a straight-line portion on at least the terminal end portion of the front edge so that the straight-line portion extends along the direction of movement of the support and is not longer than one mm, and at least one portion of the center and back edge surfaces protrudes from the extension line of the straight-line toward the support.The coating apparatus is suitable for preparing magnetic recording media.

公开(公告)号：US5042422A

公开(公告)日：1991-08-27

申请号：US297756

申请日：1989-01-17

申请人： Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takemasa Namiki

发明人： Seiichi Tobisawa ,  Shigetoshi Kawabe ,  Takemasa Namiki

IPC分类号： B05C5/02

CPC分类号： B05C5/0262

摘要： The invention provides an apparatus for coating a solution on a tape-shaped flexible support which is moved so as to run along a top surface of coating head. The coating head is slitted so as to form a front edge surface, a back edge surface in order in the moving direction of the flexible support, and a slit therebetween so that the solution is extruded through the slit of the coating head to the flexible support. In this configuration, at least a part of the back edge surface projects beyond the tangent line at the downstream end of the front edge surface.

公开(公告)号：US4995339A

公开(公告)日：1991-02-26

申请号：US311250

申请日：1989-02-16

申请人： Seiichi Tobisawa ,  Takemasa Namiki ,  Shigetoshi Kawabe

发明人： Seiichi Tobisawa ,  Takemasa Namiki ,  Shigetoshi Kawabe

IPC分类号： B05C5/02

CPC分类号： B05C5/0254

摘要： Disclosed is a coating head for coating a solution on a flexible support which is moved so as to run along a coating surface of the coating head. The coating surface is slitted so as to form a front face, a back face in order in the moving direction of the flexible support, and a slit therebetween so that the coating head extrudes the solution through the slit to the flexible support. The front face has an arc surface with a curvature radius of r.sub.1 and the back face wholly forms an arc surface with a curvature radius of r.sub.2 in the following equations 3 mm

公开(公告)号：US5084335A

公开(公告)日：1992-01-28

申请号：US407337

申请日：1989-09-14

申请人： Yasushi Nakano ,  Setsuko Kawahara ,  Kikuo Oonuma ,  Masahiro Umemura ,  Seiichi Tobisawa ,  Takeshi Nakajima

发明人： Yasushi Nakano ,  Setsuko Kawahara ,  Kikuo Oonuma ,  Masahiro Umemura ,  Seiichi Tobisawa ,  Takeshi Nakajima

IPC分类号： G11B5/708 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/714 ,  G11B5/716

CPC分类号： G11B5/702 ,  G11B5/714 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/258 ,  Y10T428/259 ,  Y10T428/26 ,  Y10T428/265 ,  Y10T428/31554 ,  Y10T428/3158 ,  Y10T428/31609

摘要： A magnetic recording medium improved in the magnetic recording characteristics, running properties and durability is disclosed. The magnetic recording medium comprises a non-magnetic support having on a side of the support an upper magnetic layer positioned farther from the support and a lower magnetic layer positioned closer to the support. The upper magnetic layer comprises a binder, a magnetic powder having an original BET specific surface area of not less than than 30 m.sup.2 /g and at least one abrasive selected from alumina, silicon carbide, Cr.sub.2 O.sub.3, silica, .alpha.-Fe.sub.2 O.sub.3, TiO.sub.2 and zilconia in a portion of 3 to 20 parts per 100 parts by weight of the magnetic powder, and the lower magnetic layer comprises a binder and a magnetic powder having an original BET specific surface area of less than 30 m.sup.2 /g, and kinds of the binders each contained in the upper magnetic layer and the lower magnetic layer are the same.

公开(公告)号：US06214114B1

公开(公告)日：2001-04-10

申请号：US09023843

申请日：1998-02-13

申请人： Shigetoshi Kawabe ,  Hiroyuki Aizawa ,  Seiichi Tobisawa

发明人： Shigetoshi Kawabe ,  Hiroyuki Aizawa ,  Seiichi Tobisawa

IPC分类号： B05C502

CPC分类号： B05D1/28 ,  B05C5/0245

摘要： A coating apparatus includes: a conveyor for conveying an object to be coated; and a coater for coating a coating liquid by jetting the coating liquid from a slit in a film shape and by causing the coating liquid to collide with the object to be coated. The coater is not in contact with the object to be coated, and a clearance of a slit exit d (m) of the coater satisfies a relation of 0

摘要翻译： 涂布装置包括：用于输送被涂物体的输送机; 以及涂布机，其通过从膜形状的狭缝喷射涂布液，并使涂布液与待涂布物体碰撞来涂布涂布液。 涂布机不与被涂物接触，涂布机的狭缝出口d（m）的间隙满足0

公开(公告)号：US5324357A

公开(公告)日：1994-06-28

申请号：US948400

申请日：1992-09-21

申请人： Tetsuo Okuno ,  Shigetoshi Kawabe ,  Seiichi Tobisawa

发明人： Tetsuo Okuno ,  Shigetoshi Kawabe ,  Seiichi Tobisawa

IPC分类号： B05C5/02 ,  B05C9/06 ,  G11B5/848 ,  B05C3/18

CPC分类号： G11B5/848 ,  B05C5/0254 ,  B05C9/06

摘要： An extrusion coating apparatus for magnetic recording media, which have excellent electro-magnetic conversion characteristics, is capable of coating thin layers stably at high speed. The object of the invention is achieved by the use of certain predetermined shapes for edges of the coating head.

摘要翻译： 具有优异的电磁转换特性的用于磁记录介质的挤出涂布装置能够以高速稳定地涂覆薄层。 本发明的目的是通过使用某些预定形状来实现涂覆头的边缘。

公开(公告)号：US5643363A

公开(公告)日：1997-07-01

申请号：US408567

申请日：1995-03-22

申请人： Ryuji Hosogaya ,  Eizo Tsunoda ,  Akira Hatakeyama ,  Yoshihisa Osawa ,  Hideki Tanaka ,  Seiichi Tobisawa

发明人： Ryuji Hosogaya ,  Eizo Tsunoda ,  Akira Hatakeyama ,  Yoshihisa Osawa ,  Hideki Tanaka ,  Seiichi Tobisawa

IPC分类号： B05C5/02 ,  B05C9/06 ,  G11B5/842 ,  G11B5/848 ,  B05C3/12

CPC分类号： B05C9/06 ,  B05C5/0254 ,  G11B5/848

摘要： The center line average roughness (Ra) of the slit inner surfaces is made in a predetermined range of 5.0 .mu.m according to the present invention, and the straightness (W1) in the delivery direction of the coating solution thereof and the straightness (W2) in the perpendicular direction to the delivery direction thereof are made in predetermined ranges respectively in preferred embodiments. Thereby, development of wrinkles and inclined elongation in the tape itself are prevented when wound on a roll, the productivity is increased, and the product quality is improved.

摘要翻译： 根据本发明，狭缝内表面的中心线平均粗糙度（Ra）在5.0μm的预定范围内，其涂布溶液的输送方向和直线度（W2）的直线度（W1） 在优选实施例中分别在预定范围内沿垂直于其输送方向的方向。 因此，当卷绕在卷上时，可以防止带本身的褶皱和倾斜伸长的发展，提高生产率，并提高产品质量。

公开(公告)号：US5336322A

公开(公告)日：1994-08-09

申请号：US25970

申请日：1993-03-03

申请人： Seiichi Tobisawa ,  Hironobu Iwashita

发明人： Seiichi Tobisawa ,  Hironobu Iwashita

IPC分类号： B05C5/02 ,  B05C9/06 ,  G03C1/74 ,  G11B5/848 ,  B05C3/12

CPC分类号： G11B5/848 ,  B05C5/0254 ,  B05C9/06 ,  G03C1/74 ,  G03C2001/7459 ,  G03C2001/7481

摘要： Disclosed is an apparatus for coating by extrusion a coating solution on a surface of a beltlike material continuously running comprising a coater die having a plurality of edges and a slit being provided between said edges, wherein a part of said coater die, which has contact with said beltlike material or said coating solution, is covered with a film having Vickers hardness of not less than HV 1,700 wherein the film is prepared by an ion plating method. The apparatus is capable of achieving a stable coatability.

摘要翻译： 公开了一种通过将涂布液挤压在连续运行的带状材料的表面上进行涂布的装置，包括具有多个边缘的涂布机模具和设置在所述边缘之间的狭缝，其中所述涂布机模具的一部分与 所述带状材料或所述涂布溶液用维氏硬度不低于HV 1,700的膜覆盖，其中所述膜通过离子镀法制备。 该装置能够实现稳定的涂布性。