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21. 发明专利

JPS5769530A Surface finishing device for magnetic recording disc 失效
标题翻译：用于磁记录盘的表面处理装置
公开(公告)号：JPS5769530A
公开(公告)日：1982-04-28
申请号：JP14547280
申请日：1980-10-17
申请人： Fujitsu Ltd
发明人： ITOU KENICHI , NARUMI TOSHIKATSU , MAEDA MIYOZOU
IPC分类号： G11B5/84
CPC分类号： G11B5/84
摘要： PURPOSE:To improve the efficiency and the safety of the work, by fitting work tapes to three pairs of work heads, which are faced to a magnetic disc, and supplying prescribed liquid agents to perform automatically wrapping, cleaning, and vanishing processes by a sequence driving. CONSTITUTION:When a control device is started, a main shaft 3 is rotated with a prescribed number of rotations, and the first and the second pressure rollers 12a and 12b approach the film coating face of a magnetic disc 4, and much water for cleaning is discharged from the second liquid nozzle 16b. Rollers are pressed to the film coating face by a prescribed pressure, and medium tapes 13a and 13b for work are wound in a slow speed, and wrapping the cleaning treatments are started under this state. After a prescribed time, only the cleaning treatment is performed, and the rotation speed is switched to perform the vanishing treatment due to a pressure roller 12c. Carriers of work heads are traversed while repeating these treatments to treat all of the surface. Thus, the efficiency and the safety of the work are improved.
摘要翻译：目的：为了提高工作的效率和安全性，通过将工作带安装在面对磁盘的三对工作头上，并提供规定的液体剂以按顺序自动进行包装，清洁和消除过程驾驶构成：当启动控制装置时，主轴3以规定的转数旋转，第一和第二压力辊12a和12b接近磁盘4的膜涂面，并且用于清洁的大量水是从第二液体喷嘴16b排出。辊子通过规定的压力被压到膜涂覆面上，并且用于工作的介质带13a和13b以低速卷绕，并且在该状态下开始包装清洁处理。在规定时间之后，仅进行清洁处理，切换转速，由于加压辊12c进行消失处理。在重复这些处理以处理所有表面的同时遍历工作头的载体。因此，提高了工作的效率和安全性。

22. 发明专利

JPH0541074A COMBINING STRUCTURE FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0541074A
公开(公告)日：1993-02-19
申请号：JP19682091
申请日：1991-08-06
申请人： FUJITSU LTD
发明人： SUZUKI HIROSHI , TAGUCHI MASAKAZU , NARUMI TOSHIKATSU , NAKADA MASAHIRO , NAKAHARA TAKESHI
IPC分类号： G11B33/02 , G11B33/12
摘要： PURPOSE:To miniaturize a whole by combining to superpose each other a high part A housing an optical disk rotating motor and an optical head and a low part B housing an optical disk of two housings and making the height of the whole A+B. CONSTITUTION:The optical disk rotating motors 12, 12A and body parts 11-1, 11A-1 housing the optical heads 13, 13A of two housings 11, 11A are arranged by shifting in an opposite direction each other. Similarly, recessed step parts 11-3, 11A-3 housing only optical disk housing spaces 15, 15A, as well are shifted, the body part 11-1 of a height h1 and the recessed step part 11A-3 of the height h5 are superposed. Similarly, the body part 11A-1 and the recessed step part 11-3 are superposed and the entire height h4 of an optical disk devices 10 and 10A is made to h1+h5. Thus, the space is utilized effectively and the whole of the devices 10 and 10A is miniaturized than the construction of h1X2.

23. 发明专利

JPH03142727A OPTICAL DISK 失效
公开(公告)号：JPH03142727A
公开(公告)日：1991-06-18
申请号：JP27852289
申请日：1989-10-27
申请人： FUJITSU LTD
发明人： IMAMURA FUMINORI , MAEDA MIYOZO , NARUMI TOSHIKATSU , MORIBE MINEO
IPC分类号： G11B7/24
摘要： PURPOSE:To prevent interference of reflected light and to avoid disturbance in tracking error signals even when a protective film is made thin, by providing a reflection-preventive film on a transparent resin protective film formed on a recording medium layer. CONSTITUTION:A reflection-preventive film is formed on a transparent resin protective film which is formed on a recording medium layer. Namely, reflection of light on the surface of the transparent protective film 3 is prevented when the medium is irradiated with light. Even when the protective film 3 is made thin with using low viscosity resin, interference of light can be prevented. Thereby, disturbance in tracking error signals can be avoided.

24. 发明专利

JPH02232836A MAGNETO-OPTICAL DISK 失效
公开(公告)号：JPH02232836A
公开(公告)日：1990-09-14
申请号：JP5313389
申请日：1989-03-06
申请人： FUJITSU LTD
发明人： NARUMI TOSHIKATSU
IPC分类号： G11B11/10 , G11B7/24 , G11B11/105
摘要： PURPOSE:To protect a recording film against the friction and shock of a magnetic head and to allow the stable overwriting of information by laminating an undercoating film, the recording film and a protective film on a disk substrate and providing a resin film subjected to a surface roughening treatment on the protective film. CONSTITUTION:The undercoating film 2, the recording film 3 and the protective film 4 are laminated on the disk substrate 1 to form the magneto-optical disk. For example, an acrylic UV curing resin is applied by spin coating on this film 4 and is irradiated with UV rays by which the coating is cured. The surface is subjected to the surface roughening treatment to form the resin film 5. The magnetic head can fly while the attraction thereof is prevented by adequately adjusting the surface roughness of the film 5. The recording film of the magneto- optical disk is protected against the sliding friction and impact of the magnetic head in this way and the stable overwriting of the information by using the flying magnetic head is executed.

25. 发明专利

JPH02193312A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH02193312A
公开(公告)日：1990-07-31
申请号：JP1099589
申请日：1989-01-21
申请人： FUJITSU LTD
发明人： NANBA YOSHIYUKI , NARUMI TOSHIKATSU
IPC分类号： G11B5/716 , C09D5/23 , C09D129/00 , C09D129/10 , C09D133/00 , C09D133/04 , C09D161/04 , C09D161/06 , C09D163/00
摘要： PURPOSE:To impregnate a magnetic coating film with a larger amount of lubricant without decreasing the film strength by constituting the magnetic coating film of a two-layer structure and incorporating specific amounts of magnetic powder into each layer. CONSTITUTION:The magnetic layer A containing 45 - 85wt% magnetic powder, thermosetting resin and thermoplastic resin is formed on an Al substrate 1, heat treated, then immersed in a solvent to extract the thermoplastic resin in the layer A and again heat treated. Then the magnetic layer B containing >85wt% magnetic powder, thermosetting resin and thermoplastic resin is formed on the layer A, immersed in a solvent to extract the thermoplastic resin and heat treated. Then this hardened film is impregnated with a lubricant (e.g. fluorocarbon oil) to give the medium of this invention. By this method, a larger amount of lubricant can be incorporated into the medium, which improves the durability of the medium.

26. 发明专利

JPH02108207A MAGNETIC HEAD 失效
公开(公告)号：JPH02108207A
公开(公告)日：1990-04-20
申请号：JP26014288
申请日：1988-10-14
申请人： FUJITSU LTD
发明人： NARUMI TOSHIKATSU , NANBA YOSHIYUKI
IPC分类号： G11B5/187
摘要： PURPOSE:To narrow the interval of a gap and to attain the high density recording the providing a metallic magnetic film with a large saturated magnetic flux density on the surface of the head core opposite to a recording medium. CONSTITUTION:A metallic magnetic film 8 composed of Fe-Al-Si is provided on the surface of a magnetic head 1 opposite to a magnetic disk 2. Thus, by providing the metallic magnetic film 8 with a large saturated magnetic flux density, the magnetic flux density to pass through a gap 4 in the same way as an MIG head can be increased, and thus, in a recording medium 5 of the magnetic disk 2, the magnetic flux density necessary for the recording and reproducing of the information can be secured. The metallic magnetic film 8 can be formed by the sputtering method, etc., the magnetic film 8 is brought into contact with the head core 3 composed of ferrite, since it is extended in the surface direction, it does not work as a gap, for this reason, the generation of the pseudo peak can be prevented, and since the tip of the gap is composed of the metallic magnetic body with the large saturated magnetic flux density, the interval (gap length) of the gap can be narrowed and thus, the high density recording can be executed.

27. 发明专利

JPH0224836A PRODUCTION OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH0224836A
公开(公告)日：1990-01-26
申请号：JP17373488
申请日：1988-07-14
申请人： FUJITSU LTD
发明人： NANBA YOSHIYUKI , FUKUSHIMA SHIGERU , NARUMI TOSHIKATSU
IPC分类号： G11B5/842
摘要： PURPOSE:To improve the durability of the magnetic recording medium by forming the magnetic film into two-layered structure and increasing the impregnation rate of a lubricating agent while assuring the mechanical strength of the magnetic films. CONSTITUTION:A 1st magnetic layer 2 is formed by coating a 1st magnetic coating compd. which contains magnetic powder, thermosetting resin and thermoplastic resin having compatibility with the thermosetting resin and in which the ratio of the content of the thermoplastic resin to the total content thereof exceeds 30wt.% on a substrate 1. The 2nd magnetic layer 3 similar to the layer 2 is formed on the layer 2. The layer 3 is imperfectly cured by heating. The thermoplastic resin is then extracted away by a solvent from the layers 2, 3. The magnetic films of the layers 2, 3 are completely cured. The lubricating oil is then impregnated into the magnetic films. The impregnation rate of the lubricating agent is substantially increased while the mechanical strength of the magnetic films is assured in this way, by which the durability is improved.

28. 发明专利

JPS63275083A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS63275083A
公开(公告)日：1988-11-11
申请号：JP11111287
申请日：1987-05-07
申请人： FUJITSU LTD
发明人： NARUMI TOSHIKATSU , FUKUSHIMA SHIGERU , TAKAHASHI JUN
IPC分类号： G11B21/12 , G11B23/03
摘要： PURPOSE:To reduce a head crush by communicating the end of a gimbal support bar and an arm by a piezoelectric element, and floating a magnetic head with the voltage impression onto this piezoelectric element. CONSTITUTION:A fulcrum 9 is provided from an arm 3 on the gimbal support bar 8 connected to a gimbal 2 and the float amt. of a magnetic head 1 is varied by selecting the fulcrum position of this gimbal support bar 8. Namely the gimbal support bar 8 at the opposite side to the magnetic head 1 is bent in an L shape and the magnetic head 1 is floated from a magnetic disk 11 by placing the piezoelectric element 10 having large electric mechanical combination coefft. of the lead titanate zirconate (PLZT) adding a lanthanum, barium titanate (Ba TiO3), etc. between that and the arm 3 and extending the piezoelectric element 10 by impressing a voltage on this electrode. The head crush can thus be reduced and the reliability is improved.

29. 发明专利

JPS63222327A PRODUCTION OF MAGNETIC DISK 失效
公开(公告)号：JPS63222327A
公开(公告)日：1988-09-16
申请号：JP5415487
申请日：1987-03-11
申请人： FUJITSU LTD
发明人： TAKAHASHI JUN , FUKUSHIMA SHIGERU , NARUMI TOSHIKATSU
IPC分类号： G11B5/82 , C09D5/23 , C09D7/12 , G11B5/73 , G11B5/842
摘要： PURPOSE:To form a coated film having no gradient in film thickness at a low cost without a polishing stage by executing spin coating while moving the position of a spin coating device where a coating compd. is dropped from the inside in a radial direction toward the outside. CONSTITUTION:The magnetic coating compd. contg. magnetic powder of, for example, gamma-Fe2O3, is coated on a disk substrate 1 while the position of the spin coating device where the coating compd. is dropped is moved from the inside of the radial direction toward the outside at, prescribed

30. 发明专利

JPS63154772A PRODUCTION OF MAGNETIC PAINT 失效
公开(公告)号：JPS63154772A
公开(公告)日：1988-06-28
申请号：JP30161986
申请日：1986-12-19
申请人： FUJITSU LTD
发明人： FUKUSHIMA SHIGERU , TAKAHASHI JUN , NARUMI TOSHIKATSU
IPC分类号： C09D5/23 , G11B5/842
摘要： PURPOSE:To obtain magnetic paint which enables high-density recording with high orientation and low noise and is useful for magnetic recording mediums, by conducting kneading with a sand grinder in which parts to be in contact with raw material for magnetic paint are composed of the same wear-resistant plastic material. CONSTITUTION:In a sand grinder for use in producing magnetic paint by kneading a magnetic powder with a binder, a solvent, etc., the magnetic paint is prepd. by using a sand grinder in which all parts to be in contact with the magnetic paint are composed of the same wear-resistant plastic material. The parts to be in contact with the paint are the inner wall of a pot, a stirring disc and kneading beads. As the wear-resistant plastic material, polyamide resins are preferred from the viewpoints of resistance to solvents to be used, mechanical strengths, hardness, etc. According to the method of this invention, a magnetic paint in which the magnetic powder is well dispersed and not broken and no dust formed by wearing is contained can be obtd.

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