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公开(公告)号：JP2001351221A
公开(公告)日：2001-12-21
申请号：JP2001108293
申请日：2001-04-06
Applicant: EMTEC MAGNETICS GMBH
Inventor： JAKUSCH HELMUT DR , KOHL ALBERT , HEILMANN PETER DR , VEITCH RONALD JOHN , KRESS RIA , MUELLER STEFAN , SANDROCK JOHANNES , HEENE HARTMUT
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium which uses pigment in the lower side layer, which is markedly characterized in that it is every finely pulverized, more economical than the conventional pigment in the lower side layer and magnetically soft. SOLUTION: A multilayered magnetic recording medium, suitable for high recording density and digital recording, having superior electromagnetic recording characteristics and improved surface smoothness and capable of sufficiently absorbing a large quantity of lubricant in the lower side layer, is provided with an upper-side magnetic recording layer, having less than 0.5 μm layer thickness and at least one layer of lower side layer which includes the magnetically soft pigment.
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公开(公告)号：JPH11203659A
公开(公告)日：1999-07-30
申请号：JP29975598
申请日：1998-10-21
Applicant: EMTEC MAGNETICS GMBH
Inventor： WIEGEMANN HANS-BERTRAM , STEHLE PETER , TRAUB HANSJOERG , JAKUSCH HELMUT DR
Abstract: PROBLEM TO BE SOLVED: To provide a general-purpose magnetic recording medium having neither magnetic nor mechanical anisotropy, but being improved in wear resistance and having an excellent mechanical stability at the same time. SOLUTION: This medium is a magnetic recording medium which has at least two layers 9, 8 formed upper and lower, and the lower layer 8 contains acicular magnetic powder having a coercive force of 5-40 kA/m and magnetization of 20-70 nTm /g. While the layers are still in a wet state after they have been formed, they are subjected to a magnetic non-orientation processing of magnetic recording medium, and are made non-isotropic magnetically and mechanically. The magnetic recording medium thus manufactured is suitable for a floppy disk having a high storage capacity exceeding 100 Mbits.
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公开(公告)号：JP2002097020A
公开(公告)日：2002-04-02
申请号：JP2001277009
申请日：2001-09-12
Applicant: EMTEC MAGNETICS GMBH , HOYA CORP
Inventor： JACHOW HARALD , SCHWAB EKKEHARD , KOERNER REINHARD , MUELLER NORBERT , LEHNERT RUDI , OHLINGER MANFRED , AUWETER HELMUT , JAKUSCH HELMUT DR , VEITCH RONALD J , BOBRICH MICHAEL , YOSHIKUNI KEISUKE , KAMISAKI ATSUSHI , TOMA YOJI , TSUKADA SHOGO
IPC: C01G37/027 , C09D5/23 , G11B5/706 , G11B5/73
Abstract: PROBLEM TO BE SOLVED: To provide a method of producing acicular chromium dioxide having high coercive force, short particle length and narrow particular size distribution. SOLUTION: The method of producing chromium dioxide modified by iron and tellurium or antimony and having coercive force of >60 kA/m, saturation magnetization of >85 nTm3/g and average particle length of
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公开(公告)号：JP2001357512A
公开(公告)日：2001-12-26
申请号：JP2001108310
申请日：2001-04-06
Applicant: EMTEC MAGNETICS GMBH
Inventor： VEITCH RONALD JOHN , JAKUSCH HELMUT DR , KOHL ALBERT , HEILMANN PETER DR , KRESS RIA , ILMER ANDREAS DR , MUELLER STEFAN , SANDROCK JOHANNES
IPC: B42D15/10 , G11B5/62 , G11B5/70 , G11B5/706 , G11B5/708 , G11B5/712 , G11B5/714 , G11B5/716 , G11B5/842 , G11B5/845 , G11B5/852 , H01F1/34
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium which has excellent electromagnetic characteristics in the entire range of the recording wavelength and excellent mechanical characteristics, is suitable for recording of digital data and can be manufactured by a well-known technique and in which the problem of head saturation is not caused. SOLUTION: In the multi layered magnetic recording medium suitable for high recording density and digital recording, having excellent electromagnetic recording characteristics in the entire range of a recording wavelength, excellent mechanical characteristics, improved surface smoothness and flat frequency response, an upper side magnetic recording layer having
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公开(公告)号：JPH1145425A
公开(公告)日：1999-02-16
申请号：JP14311798
申请日：1998-05-25
Applicant: EMTEC MAGNETICS GMBH
Inventor： HEILMANN PETER DR , ILMER ANDREAS DR , JAKUSCH HELMUT DR , LENZ WERNER DR , MUNCH MICHEL DR , NICKOLAY GERD , SCHNEIDER NORBERT
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording material improved in the surface shape, having a good traveling property, particularly an improved output level, a low modulation noise and a less fluctuation in the output level during traveling of a tape. SOLUTION: This recording material consists of a nonmagnetic substrate and more than one different layer provided on this substrate and at least one layer among these different layers is a magnetic layer suitable for storing information. In this case, when the recording material 3 is mounted on a reference surface 2 while a surface 3' opposite to an information recording head imparts the tension of about 14-200 mN to the recording material 3, the recording material 3 has such a surface shape that 50% of the surface 3' is separated from the reference surface 2 by
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Patent Agency Ranking
公开(公告)号：JPH10283630A
公开(公告)日：1998-10-23
申请号：JP8609098
申请日：1998-03-31
Applicant: EMTEC MAGNETICS GMBH
Inventor： GOETZ KLAUS , JAKUSCH HELMUT DR , LOCH WERNER DR , HOFFMANN ERICH , GOTTMANN HANS-GEORG , JENOR HANS-JOACHIM , VOIT JOHANN DR
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium with which the audible linear distortions in association with a Dolby noise suppression system are eliminated, the production is simplified and the output levels at low frequencies and high frequencies are improved. SOLUTION: This magnetic recording medium consists of a nonmagnetic base 1 and at least two magnetic layers 2, 3 formed on this nonmagnetic base 1. These two layers 2, 3 contain magnetizable metal oxides as magnetic pigments. These magnetic pigments consist of cobalt-contg. FeOx (1.33
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公开(公告)号：DE19747068A1
公开(公告)日：1999-04-29
申请号：DE19747068
申请日：1997-10-24
Applicant: EMTEC MAGNETICS GMBH
Inventor： WIEGEMANN HANS-BERTRAM DR , STEHLE PETER , TRAUB HANSJOERG DR , JAKUSCH HELMUT DR
Abstract: A magnetic recording medium has a lower layer containing an acicular pigment with a coercive field strength of ≤ 40 kA/m and an upper layer containing a ferromagnetic metal powder and is subjected to a magnetic disorientation treatment immediately after coating. A magnetic recording medium consists of a non-magnetic backing coated with a lower layer of an acicular pigment dispersed in a binder and a NOTGREATER 0.4 mu thick upper layer of a ferromagnetic metal powder dispersed in a binder, the novelty being that the pigment in the lower layer has a coercive field strength of ≤ 40 kA/m and that the medium is subjected to a magnetic disorientation treatment in the wet state immediately after layer application. Independent claims are also included for methods of producing the above magnetic recording medium in which (i) the two magnetic layers are passed, in the wet state immediately after application, through a disorientation apparatus consisting of an alignment zone with a constant unipolar magnetic field of direction perpendicular to the backing, a transition zone in which the first zone magnetic field is continued but progressively decreases to NOTGREATER 10 % of the field strength in the first zone, and a field-free non-alignment zone of length such that the magnetic anisotropic pigments in the liquid dispersions spontaneously disorientate; (ii) the disorientation apparatus consists of two alternating magnetic field devices, the first field direction having a higher field strength than the second; or (iii) the disorientation apparatus consists of a first magnetic device in which the anisotropic particles are made perpendicular, followed by a second arrangement of magnetic plates which are located at opposite sides of the backing and which produce a magnetic field acting perpendicularly to the backing so that the field orientation progressively changes by 180 degrees in the coating direction while the field strength decreases.
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公开(公告)号：DE59208794D1
公开(公告)日：1997-09-18
申请号：DE59208794
申请日：1992-11-26
Applicant: EMTEC MAGNETICS GMBH
IPC: G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/845
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公开(公告)号：ES2171160T3
公开(公告)日：2002-09-01
申请号：ES93104833
申请日：1993-03-24
Applicant: EMTEC MAGNETICS GMBH
Inventor： VEITCH RONALD JOHN DR , JAKUSCH HELMUT DR , HEILMANN PETER DR
IPC: G01K11/06
Abstract: A description is given of a monitoring device for frozen foods, with the aid of which overshooting of an additional storage temperature is irreversibly indicated. A flat plastic bag with transparent walls is connected to the frozen goods in a thermally conductive fashion, and a eutectic medium having a liquid/solid phase transition in the range from 0 DEG C to -50 DEG C is introduced into said bag together with a magnetic dispersion consisting of finely disperse magnetic pigments. Bonded on the bag is a magnetic strip which contains a magnetically recorded pattern and which remains connected to the bag until the monitoring device with the frozen goods is cooled below the limiting temperature. The magnetic strip is then removed. Upon overshooting of the permissible limiting temperature, the optically or magnetically readable structure generated by the magnetic strip is cancelled in the monitoring bag, so that it is easy to monitor the frozen food. The invention permits numerous varying possibilities by the combination of a plurality of mounted magnetic strips.
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公开(公告)号：DE19722137A1
公开(公告)日：1998-12-03
申请号：DE19722137
申请日：1997-05-27
Applicant: EMTEC MAGNETICS GMBH
Inventor： HEILMANN PETER DR , ILMER ANDREAS DR , JAKUSCH HELMUT DR , LENZ WERNER DR , MUNCH MICHEL DR , NICKOLAY GERD , SCHNEIDER NORBERT
Abstract: The magnetic recording material has a non-magnetic substrate. One or several further layers are applied to the substrate. At least one of these further layers is a magnetic layer suitable for storing information. The surface of the recording material nearest to the magnetic head used for recording information has a surface profile formed such that 50% of the surface has a distance of no more than 80 nm from a reference surface (2). 90% of the surface has a distance of no more than 140 nm from the reference surface (2). The recording material (3) lies on the reference surface (2) with its surface under a tension of around 140 to 200 mN. Preferably the density function of the frequency of discrete distance values exhibits a monomodal distribution.
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