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公开(公告)号：EP0161875A3
公开(公告)日：1987-10-28
申请号：EP85303134
申请日：1985-05-02
CPC分类号： H04N9/8355 , G11B5/00 , G11B5/02 , G11B5/1278 , G11B5/70678
摘要： A method for superimposed recording of a first signal and a second signal with frequency which is less than the frequency for the first signal, in a perpendicular magnetic recording medium by means of a ring-shaped magnetic head. The mutually superimposed first and second signals are supplied to the magnetic head. The value of the first signal current to be supplied to the magnetic head is set at a value which is greater than the current value for which the reproduced output level of the first signal that was recorded on the magnetic recording medium attains a maximum, and a satisfactory superimposed recording characteristic can be obtained by such an arrangement.
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公开(公告)号：EP0193844A3
公开(公告)日：1987-09-02
申请号：EP86102430
申请日：1986-02-25
CPC分类号： C08J5/18 , C08J2367/02 , Y10S428/91 , Y10T428/25 , Y10T428/31786
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3.发明公开Coloured laminated films, method of making such films and their use as tape endings 失效彩色层压薄膜，制作这种薄膜的方法及其作为胶带的使用
公开(公告)号：EP0141764A3
公开(公告)日：1986-08-27
申请号：EP84420178
申请日：1984-10-17
申请人： RHONE-POULENC FILMS
CPC分类号： B32B27/36 , B32B7/12 , B32B27/08 , B32B27/18 , B32B27/20 , B32B38/0036 , B32B2307/402 , G11B5/627 , Y10T428/24851 , Y10T428/24876 , Y10T428/31786
摘要： L'invention concerne:
- un procédé pour obtenir, par collage au moyen d'adhésif, un film complexe coloré constitué par 2 couches de poly ester adhérant l'une à l'autre par une couche adhésive con tenant des pigments colorés
- les film obtenus par le procédé
- l'utilisation des films précédents en tant qu'amorce de bande magnétique.-
公开(公告)号：EP0099127A3
公开(公告)日：1986-02-12
申请号：EP83106921
申请日：1983-07-14
发明人： Sawazaki, Norikazu
IPC分类号： G11B05/00 , G11B05/33 , G11B05/62 , G11B05/127
CPC分类号： G11B5/1278 , G11B5/00 , G11B5/33 , G11B5/332 , G11B5/62
摘要： A magnetic material (1b-2) whose high frequency characteristics vary in response to a signal field recorded on a magnetic recording medium (1) is provided as a magnetic layer in a high frequency coupling circuit including the magnetic recording medium (1) and a reproduction head (5). The coupling degree of the high frequency coupling circuit noticeably varies with the change of the high frequency characteristics of the magnetic material (1b-2), thereby enabling the reproduction of the recorded signal by utilizing the change of the high frequency characteristics.
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公开(公告)号：EP0046239A3
公开(公告)日：1983-08-03
申请号：EP81106127
申请日：1981-08-05
摘要： To a substrate (2) consisting, for example, of AlMg5, a permalloy foil (3, 12) is applied by rolling, gluing or hot sealing. On top of the softmagnetic layer, a vertical recording layer (4) is applied. Thus, for example, an aluminium foil (22) may be applied on top of the permalloy foil by combining a permalloy and an aluminium foil (22) by rolling and by applying the composite foil (24) obtained to a substrate. Then the aluminium foil is anodized, forming vertically oriented pores extending down to the permalloy foil. By means of an electrochemical process, for example, magnetic material is filled into these pores which have a relatively small thickness compared to their length, so that the magnetic material is vertically oriented. The material used for the aluminium foil (22) is highly pure aluminium with an aluminium content of at least 99.999%.
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公开(公告)号：EP0105531A3
公开(公告)日：1986-02-05
申请号：EP83111439
申请日：1983-07-14
发明人： Sawazaki, Norikazu
CPC分类号： G11B5/1278 , G11B5/00 , G11B5/33 , G11B5/332 , G11B5/62
摘要： Signals are recorded on a magnet tape (1) having a magnetic recording layer (1b-2) containing a magnetic material whose high frequency characterstic varies with a magnetic field produced therein. Changes in the coupling degree of a high frequency coupling circuit (12, 20a) caused by a signal field allows to reproduce a recorded signal.
摘要翻译： 信号记录在具有包含磁性材料的磁记录层（1b-2）的磁带（1）上，磁性材料的高频特性随其中产生的磁场而变化。 由信号场引起的高频耦合电路（12,20a）的耦合度的变化允许再现记录的信号。
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公开(公告)号：EP0077549A3
公开(公告)日：1985-06-05
申请号：EP82109567
申请日：1982-10-15
CPC分类号： G11B5/62 , G11B5/7305 , G11B5/84 , Y10S428/90 , Y10T428/24612 , Y10T428/25
摘要： A magnetic recording medium in which a thin ferromagnetic film is formed over a strip or sheet of plastic film whose surface is formed with grain-, rumple- or worm-like nodules into which may be dispersed finely divided particles of the diameter ranging from 0.01 to 0.2 µm. In the case of a thin ferromagnetic metal film type recording medium, steep protrusions of the height ranging from 100 to 2,000 A are distributed over the surface at the average density of 10 4 to 106 per m m 2 .
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公开(公告)号：EP0025636A3
公开(公告)日：1981-06-10
申请号：EP80302302
申请日：1980-07-07
摘要： A uniformly distributed magnetic recording medium is carried on or in an initially fluidizable support. During or after magnetically writing information upon the medium, the support is changed to a fluidized state, sufficient to permit some physical translational movement of the medium in localized areas corresponding in pattern to characteristic magnetic non-uniformities caused in medium by the magnetic writing. The support is then set or otherwise converted to a state in which such movement is no longer possible. Thereafter, even if the medium is degaussed, the now set non-uniformities in physical distribution of the recording medium, will permit the information that had been magnetically written, to continue to be read e.g. by magnetic analysis of the medium..
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公开(公告)号：EP0184034A3
公开(公告)日：1988-05-04
申请号：EP85114367
申请日：1985-11-12
发明人： Suzuki, Takao , Sagawa, Masato
IPC分类号： G11B05/62 , G11B05/64 , G11B05/708 , G11B11/03 , G11C13/06
CPC分类号： G11B5/656 , G11B5/64 , Y10S428/90 , Y10S428/928 , Y10T428/26 , Y10T428/265
摘要： A perpendicular magnetic recording medium is fabricated based on R 21-60 (Fe 1-y Co y ) z M 0-10 wherein z is balance and at least 70 at % of R is Nd and/or Pr, the balance of R being one or more of other rare earth elements, and wherein y is less than 0.5 by atomic ratio. M is at least one of various additional metal elements. The Curie temperature Tc is between 70 to 250°C; the saturation magnetization Ms is about 450 emu/cc or more; the uniaxial perpendicular magnetic anisotropy constant Ku of 2.5 x 10 s erg/cc or more is attained. Kerr rotation angle is 0.3 degree or more, which provides a magneto-optic recording medium. Since light rare earth elements having the collinear alignment of magnetic moment with Fe are used as a key element, it is possible to fabricate uniform perpendicular magnetic anisotropy thin films in a mass production scale at a low cost.
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公开(公告)号：EP0102581A3
公开(公告)日：1986-07-23
申请号：EP83108292
申请日：1983-08-23
CPC分类号： C08J5/18 , C08G63/682 , C08J2367/02 , G11B5/7305 , Y10S428/90 , Y10T428/265 , Y10T428/266 , Y10T428/31786
摘要： A magnetic recording material which comprises a film of a polyester and a magnetic layer formed on at least one side of said film, said polyester containing more than 85 mol% of the repeating unit represented by the formula below and having an intrinsic viscosity of 0.3 to 1.4, and said film of said polyester having a refracrive index ratio of 0.935 to 0.975 in the thickness direction and a density index of 0.02 to 0.08.
(where X is a halogen atom selected from fluorine, chlorine, and bromine, or an alkyl group of carbon number 1 to 3; and t and m are an integer of 1 to 2, p is an integer of 2 to 6, and q is an integer of 2 to 4.1 Although the magnetic recording material is extremely thin, it exhibits outstanding running performance and electromagnetic conversion characteristics. It makes it possible to miniaturize the magnetic tape cassette and extend the recording time. It is useful for long-time video tape and portable 8-mm video tape.
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