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21. 发明专利

JPH02168413A MAGNETIC RECORDING MEDIUM AND ITS MANUFACTURE 失效
公开(公告)号：JPH02168413A
公开(公告)日：1990-06-28
申请号：JP17296089
申请日：1989-07-06
申请人： HITACHI LTD
发明人： SAIKI NORIYUKI , ITO YASUSHI , SAKAGUCHI ISAO , IMAMURA MASAAKI , HAYASHI MASAAKI , MAEDA FUJIO
IPC分类号： G11B5/66 , C09D5/23 , C09D129/04 , C09D161/04 , C09D161/06 , C09D163/00 , G11B5/708 , G11B5/72 , G11B5/73 , G11B5/84
摘要： PURPOSE:To improve the sliding strength by containing minute particles of polycrystal diamond into a magnetic film in a magnetic recording medium formed with the magnetic film arranged on a nonmagnetic base. CONSTITUTION:Al2O3 powder 16 and polycrystal diamond powder 17 are contained in a magnetic layer 14. A lubrication film 18 is arranged on the magnetic film 14. The powder 17 with excellent wear resistance acts against the sliding of a magnetic head 19 to improve the anti-slide strength of the magnetic disk. On the other hand, the total reinforced member is much in the magnetic recording medium with a protection film including a reinforcement member made of a polycrystal diamond or the like formed thereupon, and the medium of nearly 25wt.% almost has no noise increase and the medium is sufficiently in use.

22. 发明专利

JPH0283824A METHOD FOR INSPECTING ATTRACTING FORCE OF MAGNETIC DISK MEDIUM 失效
公开(公告)号：JPH0283824A
公开(公告)日：1990-03-23
申请号：JP23352688
申请日：1988-09-20
申请人： HITACHI LTD
发明人： OTANI YUICHI , YAMAMOTO SHIGEHARU , KANEKO KENJI , ITO YASUSHI
IPC分类号： G11B5/84
摘要： PURPOSE:To easily attain the inspection of an adsorption force by moving a magnetic head in the radial direction on a magnetic disk and diciding the size of the attracting force based on the size of oscillation due to the sliding contact to occur between the magnetic disk and the magnetic head. CONSTITUTION:While a supporting body 3 is rotated at a low speed so as not to stop a magnetic disk 1 or float a magnetic head 2, a carriage 5 is driven by a driving body 6 and the head 2 is moved in the radius direction. At this time, the head 2 is oscillated by the sliding contact and the voltage in accordance with the oscillation is outputted from a piezoelectric element 8 loaded on the head 2. It is compared with a reference level obtained statistically beforehand in a signal deciding part 10 through an amplifier 11 and the size of the adsorption force of the disk 1 and the head 2 is decided. Thus, a floating characteristic inspecting device is used and the attracting force can be inspected easily and in a short time.

23. 发明专利

JPH0281322A PRODUCTION OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH0281322A
公开(公告)日：1990-03-22
申请号：JP23232288
申请日：1988-09-19
申请人： HITACHI LTD
发明人： ITO YASUSHI , IMAMURA MASAAKI
IPC分类号： G11B5/842
摘要： PURPOSE:To enable a control of selective fine processing by irradiating the surface layer of a magnetic recording medium with UV ray and ozone to decompose and remove the binder resin only. CONSTITUTION:The surface of the magnetic layer 1 is irradiated with UV ray and ozone to result in projected fillers at the height of t2. In this process, atomic oxygen (O) plays an important role to decompose and remove the binder resin. By supplying O2 or O3 from outside, the production efficiency of atomic oxygen (O) is promoted. Chains of C-C bonds or C-H bonds which constitute the binder resin are decoupled by the UV ray, and the atomic oxygen above mentioned reacts with the decoupled part to give CO2 or H2O. Thus the binder resin is decomposed and removed. Inorganic compounds such as filler 3 and magnetic powder 2 are not decomposed or removed in this process. The projection height t2 of the filler can be obtained by washing out the magnetic powder remaining in the surface layer.

24. 发明专利

JPS6368361A MANUFACTURING DEVICE FOR MAGNETIC DISC 失效
公开(公告)号：JPS6368361A
公开(公告)日：1988-03-28
申请号：JP21079686
申请日：1986-09-09
申请人： HITACHI LTD
发明人： OTANI YUICHI , IMAMURA MASAAKI , ITO YASUSHI , SUZUKI SHOJI , TSUCHIYAMA RYUJI , KAWAMURA YOSHIO , MAEHARA KIYOSHI
IPC分类号： B24B39/06 , G11B5/84
摘要： PURPOSE:To improve precision and reliability by alternately transferring a cleaning head which is cleaned in the second and third units into the first unit for applying varnish treatment and cleaning treatment for a magnetic disc medium. CONSTITUTION:In the second and third units II and III having the stations for desorption, cleanliness check, washing, cleaning, and cleanliness check, a varnishing head 2 and cleaning head 3 which are held onto the head transferring machines 5 and 6 and cleaned are alternately transferred into the first unit I by the head transfer means 8 and 9. After, in the first unit I, cleaning processing is performed by the cleaning head 3, revolving a magnetic disc medium 1 by a driving part 7, varnishing treatment is performed by the varnishing head 2, and the floating-up characteristic is inspected by a floating-up testing head 4. Therefore, the breakage of the medium due to the adhering substance during the treatment is dissolved, and the medium having a high precision and high reliability can be obtained.

25. 发明专利

JPS6339186A CLEANING TAPE FOR MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS6339186A
公开(公告)日：1988-02-19
申请号：JP18016886
申请日：1986-08-01
申请人： HITACHI LTD
发明人： IMAMURA MASAAKI , ITO YASUSHI , OTANI YUICHI , KAWAMURA YOSHIO , MAEHARA KIYOSHI , SUZUKI SHOJI
IPC分类号： G11B23/50
摘要： PURPOSE:To surely and efficiently remove contaminants by arranging two kinds of piles whose tip diameter differs from each other in mixture. CONSTITUTION:The pile group 13 consists of small sized diameter piles 14 having small diameters, e.g., around 0.1mum so as to enter a narrow recessed part on a magnetic disk 1 and large size piles 15 having plural kinds of diameters e.g., several mum - several tens of mum. Then the small sized pile 14 and the large sized pile 15 are arranged in mixture or in zigzag by every pile or every several piles. Since the thick pile wipes out contaminants with strong adhesive force and the thin pile wipes out contaminants infiltrated to the recessed part of the magnetic recording medium in such a way, the contaminants adhered to the magnetic recording medium is removed surely and efficiently by the piles.

26. 发明专利

JP2017081724A エレベーター装置有权
公开(公告)号：JP2017081724A
公开(公告)日：2017-05-18
申请号：JP2015213634
申请日：2015-10-30
申请人：株式会社日立製作所 , Hitachi Ltd
发明人： KARIYA TOMOKI , FUKUYA TAKESHI , KAWAMURA YOSUKE , ITO YASUSHI
IPC分类号： B66B11/02 , B66B13/30
摘要：【課題】かご戸の戸閉力に影響を与えることなく、乗りかご内の気圧変動に応じて簡単に密閉することができるようにしたエレベーター装置を提供する。【解決手段】かご戸2と、かご戸2に対して相対的に固定された乗りかご側規制部6の裏面との間に、かご戸2の閉状態で間隙14を形成し、かご戸2の閉状態で互いに自由端側を重ね合わせて間隙14を塞ぐようにかご戸2と乗りかご側規制部6の裏面とにそれぞれゴム板13,15などの可撓性部材を互い違いに取り付け、可撓性部材の重ね合わせ部分におけるかご戸2の開方向側に、かご戸2の閉状態で可撓性部材の弾性変形を許す他の間隙を有して対向するかご戸側規制部18を設けている。【選択図】図5

27. 发明专利

JPH02168402A MAGNETIC RECORDING DEVICE 失效
公开(公告)号：JPH02168402A
公开(公告)日：1990-06-28
申请号：JP23996589
申请日：1989-09-18
申请人： HITACHI LTD
发明人： MIYAKE YOSHIHIKO , KAZAMA TOSHINORI , HONDA MASANOBU , KATAOKA HIROSHI , IMAMURA MASAAKI , NAKAKOSHI KAZUO , SAIKI NORIYUKI , YONEKAWA SUNAO , OTANI YUICHI , ITO YASUSHI , KATO YOSHIKI , HAYASHI MASAAKI
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , G11B5/02
摘要： PURPOSE:To prevent wear of a magnetic disk by specifying the Knoop hardness of nonmagnetic particles mixed in a recording layer of a magnetic recording medium selected larger than that of a material used for a slider of the magnetic head. CONSTITUTION:A magnetic recording layer 20 is formed on a base 4 of a disk, and the recording layer 20 is formed by mixing nonmagnetic particles 1 and magnetic particles 2 into a resin 3. As the magnetic particles 2, for example, Fe2O3 is used, the nonmagnetic particles 1 act like a reinforcement member, and an artificial diamond is preferred. The resin 3 is, e.g., and epoxy resin and the nonmagnetic particles 1 and the magnetic particles 2 act like a binder to be coupled with the base 4. The Knoop hardness of a diamond is more than 3000, e.g., nearly 8000, and harder by a multiple of nearly 3.6 times than the hardness of nearly 2200 of a mixture comprising Al2O3 and titanium carbide used for the magnetic head. The hardness of the nonmagnetic particles 1 is increased relatively more than the hardness of a slider member of the magnetic head in this way to prevent wear of the magnetic disk.

28. 发明专利

JPS6390023A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS6390023A
公开(公告)日：1988-04-20
申请号：JP23459786
申请日：1986-10-03
申请人： HITACHI LTD
发明人： TSUCHIYAMA RYUJI , KAWAMURA YOSHIO , IMAMURA MASAAKI , ITO YASUSHI , OTANI YUICHI , SUZUKI SHOJI , MAEHARA KIYOSHI
IPC分类号： G11B5/62 , G11B5/82
摘要： PURPOSE:To decrease the quantity of reinforcing materials to a greater extent and to improve electrical characteristics by arranging the reinforcing materials to a specific shape on a disk surface in such a manner that a magnetic head can be supported at least at 3 points. CONSTITUTION:The reinforcing materials 3 on the disk 1 are so disposed to the prescribed position that the magnetic head, disposed in direct contact with the disk surface, can be supported at least at the 3 points. For example, the reinforcing materials 3 are disposed concentrically, spirally or radially at specified intervals by using a lithographic technique. While 10 pieces of the reinforcing materials exist in the conventional random arrangement, the quantity can be greatly decreased to half said pieces; i.e., 10 pieces in this method. The chipping away of the foreign matter stuck to the head is effectively satisfied and the improvement in the electrical characteristics is attained.

29. 发明专利

JPS6353718A MANUFACTURE OF MAGNETIC DISK 失效
公开(公告)号：JPS6353718A
公开(公告)日：1988-03-08
申请号：JP19712986
申请日：1986-08-25
申请人： HITACHI LTD
发明人： KAWAMURA YOSHIO , IMAMURA MASAAKI , OTANI YUICHI , ITO YASUSHI , TSUCHIYAMA RYUJI , SUZUKI SHOJI , MAEHARA KIYOSHI , IMAI KUNINORI , KATO SHIGEO
IPC分类号： G11B5/84
摘要： PURPOSE:To improve the accuracy of surface forming without leaving a rolled mark, by applying pressurization press and forming a base plate having a magnetic coating material with a force larger than the elastic limit of the magnetic coating material, by using a pair of dies with a prescribed surface form. CONSTITUTION:An upper die 1 and a lower die 9 are possible to be brought into contact with the magnetic coating material through a diaphragm 5, and in the inside of the diaphragm, columnar electrostriction materials 6 are arranged two-dimensionally keeping a constant interval, and displacement, or a force is generated by impressing a voltage on respective material independently by a cable. By setting the voltage applied on respective electrostriction material at an appropriate level, it is possible to change the form of a diaphragm surface to an arbitrary curved surface, and to apply a uniform force simultaneously on the magnetic coating material over the entire lane of a magnetic disk, by the upper die, and the die. By starting contact from the center of a disk first, and expanding a part to be brought into contact to an outer periphery gradually, in a concentric circle shape, by controlling an impressed voltage, the sealing of a bubble can be prevented from occurring, and a good magnetic surface plane can be obtained. In this way, high recording density with good flatness and high slidability-resistant characteristic can be obtained.

30. 发明专利

JPS6346674A SURFACE CLEANING DEVICE 失效
公开(公告)号：JPS6346674A
公开(公告)日：1988-02-27
申请号：JP18846286
申请日：1986-08-13
申请人： HITACHI LTD
发明人： SUZUKI SHOJI , ITO YASUSHI
IPC分类号： B08B7/00 , G11B23/50 , H01L21/304
摘要： PURPOSE:To obtain a clean surface without a secondary contamination by coating simultaneously a curing type adhesive substance to both the surface of a substance, to be cleaned and the base constituting the same plane as the surface and peeling off the adhesive substance after the curing from the top of the base. CONSTITUTION:When the surface of a magnetic disk 2 is cleaned, the magnetic disk 2 is fitted into the upper surface side of a base 3 and an adhesive substance 1 is coated by a coating means. The adhesive substance 1 is simultaneously coated even on a clamping base 4 provided on the base 3. After a prescribed time, when the adhesive substance 1 is cured, a piston 6 is operated, while sandwiching it by the clamping base 4 and a clamp 5, the cured adhesive substance 1 is peeled off from the base 3 and in such a condition, the substance is peeled off from the whole surface of the magnetic disk 2 by a shifting means 7. Thus, the dust existing at a magnetic disk surface can be stuck to the curing type resin, which is the adhesive substance, and removed, and the resin can be peeled off without adding the extra force to the magnetic disk surface.

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