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    PRODUCTION OF MAGNETIC DISPERSION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM PRODUCED THEREFROM
    3.
    发明专利
    PRODUCTION OF MAGNETIC DISPERSION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM PRODUCED THEREFROM 失效

    公开(公告)号：JPH11310736A

    公开(公告)日：1999-11-09

    申请号：JP31556898

    申请日：1998-11-06

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： SCHUENEMANN AXEL ,  ZETTLER HANS-DIETER ,  NAGEL PETER

    IPC: G11B5/70 ,  B01F3/14 ,  B01F3/18 ,  B01F5/06 ,  B01F7/04 ,  B01F7/06 ,  B01F11/00 ,  B05D5/12 ,  B29B7/40 ,  B29B9/00 ,  B32B3/02 ,  C09D5/23 ,  G11B5/68 ,  G11B5/84 ,  G11B5/842

    Abstract: PROBLEM TO BE SOLVED: To provide a process by which a relatively large quantity of a magnetic dispersion can be economically prepared and a magnetic coating having good magnetic values and magnetic characteristics can be realized. SOLUTION: This process consists of producing a magnetic dispersion for a magnetic-particle-containing magnetic coating having a coercive force of above 120 kA/m, a relative remanence induction Mr/Mn of at least about 0.9, and an orientation rate of at least 2.7 by means of a single axis blade type kneader having a shaft (W) which revolves within a machine frame having a machine frame wall (K), simultaneously vibrates in the axial direction, and has the function of kneading a thermoplastic resin binder and a magnetic particle mixture in a solvent, wherein (a) the radial shear gradient in the gap (s) between the tip of the kneading blade and the machine frame wall (K) is about 150 to about 1,600, particularly, about 500 to about 1,400 1/sec, and (b) the peripheral speed of the kneading blade is about 20 to about 80, particularly, about 35 to about 60 cm/sec. The thus produced magnetic dispersion can be used to produce an information recording medium and an image recording medium having a particularly high recording and memory speed.

    DEVICE FOR PROCESSING MAGNETIC TAPE
    5.
    发明专利
    DEVICE FOR PROCESSING MAGNETIC TAPE 失效

    公开(公告)号：JPH10310300A

    公开(公告)日：1998-11-24

    申请号：JP10087998

    申请日：1998-04-13

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： SCHLATTER MANFRED ,  SCHULTHEISS MANFRED

    IPC: B65H23/192 ,  B65H23/00 ,  G11B5/84

    Abstract: PROBLEM TO BE SOLVED: To process in a number of processing steps a magnetic tape which was cut to the final width, without applying excess mechanical stresses to the magnetic tape regardless of high processing speed. SOLUTION: A device 1 for processing in a number of processing steps a magnetic tape cut to the final width includes at least two substantially slip-free tape conveyors 8, 13, 14, the tape conveyors applying an average tape tension of 2N per 1 inch (25.4 mm) of tape width in order to avoid the permanent deformation of tape material, with the result that the tape tension is kept at a value that is within the elastic limit of the tape material and almost 20% lower than the maximum allowable tensile force of the tape material.

    PANCAKE MADE UP OF MEDIA IN STRIP OR TAPE FORM WITH IDENTIFICATION CODE AND PROCESS FOR PRODUCTION THEREOF
    6.
    发明专利
    PANCAKE MADE UP OF MEDIA IN STRIP OR TAPE FORM WITH IDENTIFICATION CODE AND PROCESS FOR PRODUCTION THEREOF 审中-公开

    公开(公告)号：JP2002312932A

    公开(公告)日：2002-10-25

    申请号：JP2002059709

    申请日：2002-03-06

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： SCHOLTYSIK BERND

    IPC: G11B23/113 ,  B65H75/18 ,  G11B5/78 ,  G11B5/84 ,  G11B23/027 ,  G11B23/087 ,  G11B23/38 ,  G11B23/42

    Abstract: PROBLEM TO BE SOLVED: To provide a pancake made up of media in strip or tape form, in particular magnetic data recording media in tape form and comprising a magnetic tape that is cut into a use width and wound up on a hub, and an element that removes a sealing element having an internally integrated identification code and reattaches the sealing element, and a method for producing the pancake. SOLUTION: This pancake comprises the hub and media in strip or tape form, in particular the data recording media in tape form, including media wound up on the hub in a strip or tape form, and is sealed with the sealing element that connects an adhesive strip for sealing with the identification code. The sealing element is attached to the outer wound layer of the pancake in such a way that a free end of the outer wound layer of the pancake is formed in the region beneath the code portion.

    MEDIUM SUITED FOR LAMINAR HEAT TRANSFER
    9.
    发明专利
    MEDIUM SUITED FOR LAMINAR HEAT TRANSFER 失效

    公开(公告)号：JPH10175266A

    公开(公告)日：1998-06-30

    申请号：JP20641697

    申请日：1997-07-31

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： KOHL ALBERT ,  SCHNEIDER NORBERT ,  ROEMER KARL-HEINZ ,  RICHTER JUERGEN DR ,  HEILMANN PETER DR ,  HITZFELD MICHAEL DR

    IPC: B32B7/02 ,  B41M5/382 ,  B41M5/392 ,  B41M5/395 ,  B41M5/44 ,  C08L23/06 ,  G11B5/73 ,  G11B5/733 ,  G11B5/74 ,  H01F1/11

    Abstract: PROBLEM TO BE SOLVED: To obtain high wear-resistant properties and magnetic properties by providing a layer containing respectively specific rates of a polymer with a specific melt point or a softening temperature and a polymer with a specific minimum melt point or a specific minimum softening temperature, and also providing another layer containing another polymer on a base. SOLUTION: A base II and a layer III containing 75-90wt.% of a polymer IV with a melt point or a softening temperature of 100-160 deg.C and 10-25wt.% of a polymer V with a melt point or a softening temperature of minimum 90 deg.C are provided on a medium I. In addition, another layer VI containing polymer VII is provided. A monomer accounting for the most part of the polymer IV is an olefinic unsaturated hydrocarbon and the polymer V is polyurethane polyacrylate, polymethcrylate, polyacrylamide or vinyl polymer. The content of the polymer VII is upto 100wt.% for the layer VI and the polymer VII is polyacrylate, polymethacrylate, polyacrylamide or vinyl polymer.

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