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公开(公告)号：JPH09104939A
公开(公告)日：1997-04-22
申请号：JP18057696
申请日：1996-07-10
Applicant: BASF MAGNETICS GMBH
Inventor： MANFUREETO SHIYURATAA , YURUGEN KOPE , FUORUKAA AIHIHORUSUTO
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公开(公告)号：JPH0927111A
公开(公告)日：1997-01-28
申请号：JP7917596
申请日：1996-04-01
Applicant: BASF MAGNETICS GMBH
Inventor： HANSU YURUGEN RIHITAA , BUERUNAA RENTSU , RONARUDO JIYON BAICHI
Abstract: PROBLEM TO BE SOLVED: To obtain a recording medium having a high recording density by executing square wave recording in such a manner that the single phase deviating less than 5 deg. from the numerical value at which the phase of Fourier transform at the same wavelength is previously obtd. is measured in the case the square wave recording is executed. SOLUTION: The square wave signals having a frequency of 96kHz are recorded on a tape. These signals are then scanned by a digitizer read by a reading head. The pulses are obtd. by averaging the read pulses at the center. The average values of the 126 pulses in total number is obtd. In such a case, the phase response is (for example, about 5MHz) inclination 0 at the average frequency. The distinct comparison of different curves is thereby made possible.
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公开(公告)号：JPH08321031A
公开(公告)日：1996-12-03
申请号：JP7917496
申请日：1996-04-01
Applicant: BASF MAGNETICS GMBH
Inventor： HANSU YURUGEN RIHITAA , BUERUNAA RENTSU , RONARUDO JIYON BAICHI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium having high recording density. SOLUTION: A magnetic recording medium intended for high recording density exhibits advantageous recording characteristics when it has a small nonlinear distortion. At the time of square wave recording, difference between an output level outT calculated after resetting a frequency response from single pulse measurement and an output level outF measured with same wavelength goes plus when a recording current is regulated to the maximum level of basic wave of square wave function having wavelength corresponding to three times of the gap width gW of an electrical head.
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公开(公告)号：JPH0850717A
公开(公告)日：1996-02-20
申请号：JP356695
申请日：1995-01-12
Applicant: BASF MAGNETICS GMBH
Inventor： WUENSCH THOMAS , BRODT GREGOR , KRESS RIA , SCHNEIDER NORBERT , KOHL ALBERT , LEHNER AUGUST , BALZ WERNER
IPC: C08G18/12 , C08G18/61 , C08G18/65 , C08G18/66 , C09D5/23 , C09D175/00 , C09D175/04 , G11B5/702
Abstract: PURPOSE: To provide a coupling agent having improved mechanical characteristics, such as, limit strength, hardness, wear resistance and elasticity, and exhibiting a high crosslinking speed, by causing the coupling agent to contain polyurethane made of predetermined components and a material having a specified molecular weight. CONSTITUTION: Polyurethane contains 1mol of diol having an average molecular weight of 400-4000, 0.3-9mol of aliphatic compound having 2-18 carbon atoms, 0.3-9mol of aromatic diol having 8-30 carbon atoms, and 0.01-1mol of trivalent alcohol having 3-8 carbon atoms. The polyurethane further contains 0.01-1mol of multivalent alcohol having 3-14 carbon atoms and tertiary amino group, and diisocyanate having 6-30 carbon atoms with a molar ratio of isocyanate group to all hydroxyl groups being 1.05:1-1.4:1. This polyurethane and a predetermined compound are caused to react under specified conditions to provide a material having an average molecular weight of 4000-30000, thereby forming a magnetic recording medium.
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公开(公告)号：JPH07210857A
公开(公告)日：1995-08-11
申请号：JP28354294
申请日：1994-11-17
Applicant: BASF MAGNETICS GMBH
Inventor： HAARARUTO YAKOBU , RAINHARUTO KERUNAA , RONARUDO JIYON BAICHI , ETSUKEHARUTO SHIYUBUAPU , HERUMUUTO YAKUSHIYU , BERUNTO HEPUNAA , RUDEI REENERUTO , MANFUREETO OORINGAA
IPC: C01G37/027 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/11
Abstract: PURPOSE: To obtain a process for producing denatured chromium dioxide which exhibits a further narrow magnetic power distribution and coercive force distribution with respect to the prior art and, consequently, exhibits the coercive force of at least 40kA/m and thermal stability improved in magnetization as well. CONSTITUTION: This magnetic recording medium consists of a nonmagnetic substrate and at least one layer of magnetic layers which contain acicular CrO2 as the magnetic powder distributed uniformly in a polymer binder. The magnetic chromium dioxide is denatured by iron and tellurium or antimony and has the coercive force of at least 40kA/m, saturation magnetization of at least 85nTm /g and a specific surface area(SSA) of at least 25m /g. The decrease in the dependence of 50% in residual induction on temp. is resulted only at >=95 deg.C.
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Patent Agency Ranking
公开(公告)号：JPH07186517A
公开(公告)日：1995-07-25
申请号：JP16108394
申请日：1994-07-13
Applicant: BASF MAGNETICS GMBH
Inventor： HERUMUUTO SHIYUTAININGAA , PEETAA HAIRUMAN , MAIKERU UIRISU
IPC: B29D7/01 , B29D11/00 , B32B7/02 , B41M3/14 , B41M7/00 , B42D15/00 , B44F1/12 , C09J7/02 , G03C5/08 , G03G21/04 , G09F3/02 , G03C11/08
Abstract: PURPOSE: To manufacture a desired anti-copy film easily and precisely by separating a film web into individual copy films and folding each of the copy films into anti-copy film layers along a partition line. CONSTITUTION: When each of the opposite side surfaces of a section I corresponding to a first layer is printed with opaque or reflective, elongate coatings S1, S2 and layers are successively stacked one on another, a coating S3 is applied only onto a side surface of a section II of a second layer oppositely oriented to the first layer. When layers are successively superposed one on another, coatings S1, S2, S3 are arranged regularly and repeatedly so as to provide correct coatings. After application of coatings, a film web 6 is separated into individual anti-copy films, following which each of the anti-copy film is folded along a partition line 7, whereby a copy film ready for use can be obtained.
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公开(公告)号：JPH07144837A
公开(公告)日：1995-06-06
申请号：JP18817894
申请日：1994-08-10
Applicant: BASF MAGNETICS GMBH
Inventor： HARUTOMUUTO TEIIRE , AUGUSUTO RIIPORUTO , DEIITOMARU HIYUPUNAA , RAINAA MIYURU , KURUTO TSUBUINCHIYAA
Abstract: PURPOSE: To easily and appropriately support a wound roll by providing a spindle with a hollow support member having a longitudinal moving member inside, and pressure-supporting one end of the longitudinal moving member to a wound roll conveying device, while providing the other end with a valve for pressing a pressure medium into a bellows member of the spindle. CONSTITUTION: A spindle for supporting a tape roll 21 on a tape wound spool 20 is provided with a hollow support member 10 having a longitudinal moving member 11 inside. The longitudinal moving member 11 is provided with an outer part 11A and an inner part 11B having chucking parts 12 at the free ends. The spindle 7 is provided with a bellows member 13, and a bendable part 14 is provided on the inner surface of the bellows member 13. One end of the longitudinal moving member 11 is pressure-supported to a support plate member 16 of the roll conveying device by a spring 15, and the other end is provided with a valve 17 for pressing a pressure medium into the bellows member 13. Spindles 7', 7" in the resting state and operating state are respectively positioned as in the upper and lower half parts of a center line M.
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公开(公告)号：JPH07138022A
公开(公告)日：1995-05-30
申请号：JP13543494
申请日：1994-06-17
Applicant: BASF MAGNETICS GMBH
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公开(公告)号：JPH06301968A
公开(公告)日：1994-10-28
申请号：JP161494
申请日：1994-01-12
Applicant: BASF MAGNETICS GMBH
Inventor： HAARARUTO KERAA , URURIHI IEEGAA , HERUMUUTO SHIYUTAININGAA , HERUMUUTO KOPUKE , KURAUSU DEIITAA SHIYOOMAN , HANSUUPEETAA SHIRUTOBERUKU
Abstract: PURPOSE: To obtain a magnetic recording medium having a ferromagnetic metal layer on a nonmagnetic substrate and having a protective layer thereon which shows excellent wear resistance and corrosion resistance by constituting the protective layer of a material expressed by specified formula. CONSTITUTION: This magnetic recording medium has at least one ferromagnetic metal layer on a nonmagnetic substrate and has a protective layer on the metal layer. The protective layer comprises a compd. expressed by formula X-(CH2 )n -(CF2 )m -Y. In the formula, X is H2 O3 P, HO3 S, NaO3 SS, HS or H3 C-SO3 , Y is CH3 or CF3 , n is an integer 3 to 11, and m is an integer 0 to 7. Thereby, the obtd. medium has excellent wear resistance and corrosion resistance.
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公开(公告)号：JPH06226761A
公开(公告)日：1994-08-16
申请号：JP31810893
申请日：1993-12-17
Applicant: BASF MAGNETICS GMBH
Inventor： RAINHARUTO KURETSUCHIYUMAA , ARUBAATO PERUCHIYU , YOOZEFU SHIERUBURE
Abstract: PURPOSE: To prepare a magnetic recording medium by one operating process by using a casting extruder wherein a magnet with a shape of rectangular parallelepiped is arranged in parallel to a layer medium behind the layer medium and an opening part of the extruder exists in facing to the top end edge of the magnet. CONSTITUTION: Two layers are applied on a polyethylene terephthalate layer medium with a thickness of approximately 7 μm in a biaxial casting apparatus with a casting speed of approximately 100 m/min. In this case, the layer thickness of the top side layer is approximately 8 μm and the layer thickness of the bottom side layer is approximately 1.6 μm. Successively, a magnetic recording medium is cut into a width of approximately 8 mm. It is possible thereby to incorporate mainly a metal powder or metal powder alloy which does not spoil technical quality of a recording apparatus into the recording medium as magnetizable particles and to prepare it by one operating process.
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