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1. 发明专利

JPS58113271A PRODUCTION OF MAGNETIC PAINT 失效
公开(公告)号：JPS58113271A
公开(公告)日：1983-07-06
申请号：JP21123381
申请日：1981-12-28
申请人： FUJITSU LTD
发明人： MAEDA MIYOZOU , ISHIDA SHIYOUJI , FUKUSHIMA SHIGERU , ITOU KENICHI , OGAWA SEIYA
IPC分类号： C09D5/23
摘要： PURPOSE:To powder of alpha or gamma-alumina with a specific particle size is added as a coating film-reinforcing agent in magnetic disks, and ball milling is carried out with balls of less abrasion such as plastic balls to produce a magnetic paint giving coating films with high strength and low noise performance. CONSTITUTION:As a coating film-reinforcing agent, is added alpha or gamma-alumina powder of less than 0.1mum average particle size and ball milling is conducted by use of plastic or ceramic balls of less abrasion to give the objective paint.

2. 发明专利

JPS5856269A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS5856269A
公开(公告)日：1983-04-02
申请号：JP15460681
申请日：1981-09-29
申请人： FUJITSU LTD
发明人： FUKUSHIMA SHIGERU , MAEDA MIYOZOU , HAMADA MITSURU , ISHIDA SHIYOUJI , OGAWA SEIYA
IPC分类号： G11B33/14
摘要： PURPOSE:To prevent the moisture of the outer air from mixing into a disk enclosure (DE) and having the dew condensation to the head and disk, by adding a dehumidifying agent to one of the two breathing ports provide to the DE and opening/closing these two breathing ports alternately. CONSTITUTION:When the air in a DE1 is warmed, the pressure increases. Then the air is exhausted through a route of a breathing port 7b a filter 6 a conduit 12b a solenoid valve A. The valve A is opened as soon as a disk 2 in the DE1 turns. The air in the DE1 is warmed gradually and then exhausted. In this case, the solenoid valves B and B' are closed. The valve A is closed when the rotation of the disk 2 stops. At the same time, the valve B of the conducting tube 12a is opened and then the valve B' is opened. Thus the outer air goes into the tube 12a as the temperature in the DE1 lowers down, and the open air which is dehumidified by a dehumidifying agent 13 is dried and goes into the DE1 through a breathing port 7a.

3. 发明专利

JPS5855704A DETECTION FOR FILM THICKNESS 失效
公开(公告)号：JPS5855704A
公开(公告)日：1983-04-02
申请号：JP15290681
申请日：1981-09-29
申请人： FUJITSU LTD
发明人： MAEDA MIYOZOU , ISHIDA SHIYOUJI , FUKUSHIMA SHIGERU , SUENAGA TADATOSHI , OGAWA SEIYA
IPC分类号： G01B11/06
摘要： PURPOSE:To detect film thickness without errors by irradiating at least two beams of light having different wavelengths to a thin film, and detecting the attainment of the prescribed film thickness when the extremal values of the intensity of the interference light appear roughly simultaneously with both beams of the light. CONSTITUTION:Beams lambda1, lambda2 of 2 kinds of wavelengths emitted from a light source 51 irradiate the thin film 11a on a substrate 11b via a half mirror 52. The reflected beams thereof pass through the mirror 52 and are made incident to a detector 53. The signals SP1p, SP2p corresponding to the extremal values P1P, P2p of the outputs for both beams lambda1, lambda2 are held of level for a prescribed time by monostable circuits 63, 64 via amplifiers 61, 62. The coincidence signal of both signals is detected with an AND gate 65, and from the extremal values signal SPa thereof, the film thickness is determined without errors.

4. 发明专利

JPS5771664A Apparatus for coating magnetic recording medium with magnetic coating 失效
标题翻译：用磁性涂层涂覆磁记录介质的装置
公开(公告)号：JPS5771664A
公开(公告)日：1982-05-04
申请号：JP14858380
申请日：1980-10-23
申请人： Fujitsu Ltd
发明人： MAEDA MIYOZOU , ISHIDA SHIYOUJI , HAMADA MITSURU , ITOU KENICHI , OGAWA SEIYA
IPC分类号： B05C5/00 , G11B5/84 , G11B5/842
摘要： PURPOSE: To enhance paint coating quality and workability by a method wherein air pressure is imparted to a surface of a magnetic paint stored in a tank only during a period sending said paint under pressure as well as driving of a stirrer is interrupted only during said period.
CONSTITUTION: A synchronization control apparatus for synchronizing operation of a screw type stirrer 8 and a pressurized air valve 10 is provided. In a three-way solenoid pressurized air valve 101, IN and OUT are communicated when pressure is applied and OUT and EX and communicated when pressure is not applied and, during this time, a vlave body is revolved in an angle of 90°C. By this movement, a dog 103 kicks an actuator of a sensor 203 to pressurize a tank and, at the same time, to open a leak port 9 and, thereby, a magnetic paint is emitted onto a running substrate 4 of a magnetic recording medium from a nozzle 3 as well as stirring is interrupted. Further, when paint emission of a predetermined time is finished, a leak port valve 9 is closed and, at the same time, the pressurized air valve 101 is turned to open the tank to the atmospheric pressure and, again, the stirrer 8 begins movement.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过以下方法提高涂料质量和可加工性：仅在所述期间内仅在施加压力下驱动涂料的搅拌器期间才将油压施加到储存在罐中的磁性漆的表面，。构成：提供一种用于使螺杆式搅拌器8和加压空气阀10同步操作的同步控制装置。在三通电磁加压空气阀101中，当施加压力时，IN和OUT连通，并且当压力不施加时，OUT和EX连通，并且在此期间，浮体以90度的角度旋转。通过这种移动，一只狗103踢出传感器203的致动器以对罐进行加压，同时打开泄漏口9，从而将磁性涂料发射到磁记录介质的行进基片4上从喷嘴3以及搅拌中断。此外，当预定时间的喷射完成时，泄漏口阀9关闭，并且同时加压空气阀101转动以将罐打开至大气压，并且搅拌器8再次开始移动。

5. 发明专利

JPS5690428A SURFACE SMOOTHING METHOD OF MAGNETIC DISC SUBSTRATE 失效
公开(公告)号：JPS5690428A
公开(公告)日：1981-07-22
申请号：JP16523579
申请日：1979-12-19
申请人： FUJITSU LTD
发明人： ITOU KENICHI , HAMADA MITSURU , ISHIDA SHIYOUJI
IPC分类号： G11B5/72 , G11B5/73 , G11B5/82 , G11B5/84
摘要： PURPOSE:To smooth the magnetic disc surface to prevent wear of the head and improve floating property, by forming a lubricative protection film on the surface of the magnetic disc substrate and by polishing the substrate surface in the range where the lubricative protection film is not removed. CONSTITUTION:After the surface of magnetic coating material film 2 is finished by polishing or before a magnetic film is formed by sputtering, lubricative protection film 4 consisting of polyethylene, polypropylene, Teflon , or the like is formed on the surface of substrate 1, and the surface is polished again by the tape polish using the lapping film to 100-3,000Angstrom within such range that the lubricative protection film is not removed. As a result, since parts other than fine projections 5 are protected due to existence of lubricative protection film 4 and only fine protections are removed selectively when the surface is polished again, the number of fine projections and their height are reduced considerably, and the maximum surface roughness is

6. 发明专利

JPS55135337A MAGNETIC DISK COATING 失效
公开(公告)号：JPS55135337A
公开(公告)日：1980-10-22
申请号：JP4069879
申请日：1979-04-04
申请人： FUJITSU LTD
发明人： ISHIDA SHIYOUJI , HAMADA MITSURU
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , G11B5/70 , G11B5/84 , G11B5/842
摘要： PURPOSE:To improve the durability of a coating surface and the retentivity of lubricating oil by uniformly generating many micropores holding lubricating oil in a magnetic disk coating surface by mixing goethite powder with magnetic powder at a specific-range rate and then by carrying out a heat treatment. CONSTITUTION:To prevent the disk and magnetic head of a magnetic disk unit, providing contact start/stop operation, from damaging each other, a coating is formed of a mixture of magnetic powder and 5-55wt% of goethite (FeO.OH) powder, a heat treatment is carried out at about 250 deg.C low enough for a binder not to deteriorate so as to change FeO.OH into alphaFe2O3, and through the vaporing of water occurring at this time, micropores of molecular lavel are formed. Since alphaFe2O3 is nonmagnetic and in the same form as gammaFe2O3, lubricating oil is held by impregnating without exerting a bad influence on recording, reproduction and head abrasion. The durability of the magnetic coating film can therefore be improved.

7. 发明专利

JPS5586526A BALL MILL 失效
公开(公告)号：JPS5586526A
公开(公告)日：1980-06-30
申请号：JP16401778
申请日：1978-12-25
申请人： FUJITSU LTD
发明人： ISHIDA SHIYOUJI , HAMADA MITSURU , ITOU KENICHI
IPC分类号： B01F9/00 , B01F9/02 , B01F13/00 , B02C17/04
摘要： PURPOSE:To mix and knead a fluid material well in a short time, by putting the material together with numerous balls in a cylindrical container having spiral grooves on the inside surface and by rotating the container. CONSTITUTION:A pot 1 is rotated in the direction of an arrow R by a driver to move balls 3, 3' in the direction of another arrow A by the action of grooves 10, 10' provided on the inside surface of the pot 1. The grooves 10, 10' also act to move the balls 3, 3' in the rotating direction (the direction of the arrow R) of the pot 1. As a result, the balls are thrusted up along the rising side of the rotating pot 1 and dropped down as an avalanche frequently. Therefore, water and powder 2 contained in the pot 1 are efficiently mixed and kneaded with each other by the motion of the balls 3, 3'.

8. 发明专利

JPS5555440A PRODUCTION OF MAGNETIC PAINT 失效
公开(公告)号：JPS5555440A
公开(公告)日：1980-04-23
申请号：JP12709778
申请日：1978-10-16
申请人： FUJITSU LTD
发明人： HAMADA MITSURU , ISHIDA SHIYOUJI , ITOU KENICHI
IPC分类号： G11B5/70 , C09D5/23 , G11B5/68 , G11B5/84 , G11B5/842
摘要： PURPOSE:To obtain a magnetic paint where a magnetic property is improved, by using a metal or an oxide sintered substance as the core material of the ball of a ball mill and coating the surface of it with a resin. CONSTITUTION:A metal (stainless steel, etc.,) or an oxide sintered substance (alumina, etc.,) is used as core material 1 of a ball of a weight of 5-25g and diameter 18phi of 10-25mm, and the surface is coated with resin (polyehtylene, etc.,) 2, thereby completing the ball. This single ball or the mixture of the metallic ball and the oxide sintered substance ball is used to produce a magnetic paint. Since the diameter, the weight and the surface hardness of the ball are suitable, magnetic characteristic degradation of magnetic powder dependent upon stress received in production is prevented.

9. 发明专利

JPS5855705A DETECTION FOR FILM THICKNESS 失效
公开(公告)号：JPS5855705A
公开(公告)日：1983-04-02
申请号：JP15460981
申请日：1981-09-29
申请人： FUJITSU LTD
发明人： MAEDA MIYOZOU , SUENAGA TADATOSHI , FUKUSHIMA SHIGERU , ISHIDA SHIYOUJI
IPC分类号： G01B11/06
摘要： PURPOSE:To detect accurate film thickness by moving a light beam periodically in the direction where the film thickness changes, and detecting the attainment of a desired film thickness from the intensity of the reflected interference light thereof. CONSTITUTION:A detector 3 is moved together with a light source 2 periodically in the radial direction of a disc 1 at a frequency f0 and the light beam from the source 2 moves periodically in the radial direction of the disc 1 around the position P for detecting the film thickness. During this time, the coating film is polished by a polishing device, by which the film thickness is decreased gradually. At the film thickness at which the reflected interference light produces an extremal value, the signal of a frequency 2f0 is generated. The signal is supplied through a filter 18 then through a detector 9 to a comparator 10, from which an H signal is outputted. The signal of the frequency 2f0 is fed to a peak detector 14, by which an H signal is outputted. The H signal in accordance with the beam moving signal is outputted from a comparator 17. Thus an H signal is outputted from an AND circuit 18, and the attainment of the prescribed film thickness is accurately detected.

10. 发明专利

JPS5853069A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS5853069A
公开(公告)日：1983-03-29
申请号：JP15016081
申请日：1981-09-22
申请人： FUJITSU LTD
发明人： ISHIDA SHIYOUJI , SUENAGA TADATOSHI , FUKUSHIMA SHIGERU
IPC分类号： G11B33/14 , G11B19/20
摘要： PURPOSE:To prevent a magnetic head and a magnetic from being adsorbed, by partially heating a contact part between the head and the disc for a short time, during the idle time of the magnetic disc of a CSS system. CONSTITUTION:An infrared ray heater 11 is provided in a head disc assembly (disc enclosure) of a magnetic disc of the CSS system. Infrared rays are reflected on a flat or convex mirror 12, and the vicinity of a magnetic head 3 in contact with a disc 4 during stop is irradiated and heated before the start. Thus, humidity is decreased, the adsorption between the head 3 and the disc 4 is released, smooth start is attained, allowing to prevent damages to the head and the disc.

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