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    METHOD AND APPARATUS FOR MANUFACTURING A MAGNETIC STRUCTURE
    1.
    发明公开
    METHOD AND APPARATUS FOR MANUFACTURING A MAGNETIC STRUCTURE 审中-公开

    公开(公告)号：EP3711949A1

    公开(公告)日：2020-09-23

    申请号：EP19163834.5

    申请日：2019-03-19

    申请人： University of Vienna

    发明人： The designation of the inventor has not yet been filed

    IPC分类号： B33Y10/00 ,  B29C64/106 ,  B29C64/118 ,  B29C70/58 ,  B29C70/88 ,  B33Y30/00 ,  B33Y70/00 ,  H01F1/08 ,  H01F7/02 ,  H01F41/02 ,  H01F41/14

    摘要： Methods and apparatus (1) for manufacturing a magnetic structure (5) are disclosed. In one arrangement, a method comprises driving magnetic material in a liquid state through an outlet (7) and onto a surface (9) in an additive manufacturing process in which the magnetic material solidifies on the surface (9) and progressively builds up the magnetic structure (5). A magnetic field is used to apply a selected magnetic alignment to each of plural portions of the magnetic material before the solidification of each portion of magnetic material, such that each portion of magnetic material solidifies with a respective selected magnetic alignment.
    The magnetic field is varied in direction or strength during the driving of the magnetic material through the outlet to apply corresponding different selected magnetic alignments to different portions of the magnetic material.

    IRREVERSIBLY MAGNETICALLY INDUCED IMAGES OR PATTERNS
    3.
    发明公开
    IRREVERSIBLY MAGNETICALLY INDUCED IMAGES OR PATTERNS 审中-公开
    UMKEHRBARE MAGNETISCH INDUZIERTE BILDER ODER MUSTER

    公开(公告)号：EP2916968A1

    公开(公告)日：2015-09-16

    申请号：EP13779615.7

    申请日：2013-10-22

    申请人： Sicpa Holding SA

    发明人： LEFEBVRE, Olivier ,  MAGNIN, Patrick ,  SCHALLER, Christophe

    IPC分类号： B05D3/00 ,  B41M3/14 ,  B42D15/00 ,  C09D11/00 ,  H01F41/14

    CPC分类号： B42D25/378 ,  B05D3/067 ,  B05D3/207 ,  B05D5/061 ,  B41M3/14 ,  B42D25/00 ,  B42D25/29 ,  B42D25/369 ,  B42D2033/16 ,  B42D2033/20 ,  C09D11/02 ,  C09D11/037 ,  C09D11/101 ,  C09D11/102 ,  C09D11/107 ,  C09D11/108 ,  C09D11/50 ,  H01F41/16

    摘要： The present invention relates to the field of the protection of security documents, especially banknotes, against illegal actions such as robbery or theft. In particular, the present invention relates to the field of ink compositions for producing irreversibly magnetically induced images or patterns, said inks comprising multichromal microspheres, preferably bichromal microspheres (1) that are orientable upon application of a magnetic field and that comprise at least a first portion (2) comprising one or more dyes and/or pigments and at least a second portion (3) comprising one or more magnetic or magnetizable materials, wherein said microspheres (1) comprise as the first portion a core (2) having a surface and comprising the one or more dyes and/or pigments and as the second portion a partial coating (3) covering at least a portion of the surface of said core (2) and comprising the one or more magnetic or magnetizable materials.

    摘要翻译： 本发明涉及保护文件，特别是纸币，防止抢劫或盗窃等违法行为的领域。 特别地，本发明涉及用于生产不可逆磁感应图像或图案的油墨组合物领域，所述油墨包括多色微球，优选双重微珠（1），其可以在施加磁场时定向并且包括至少第一 包括一种或多种染料和/或颜料的部分（2）和包含一种或多种磁性或可磁化材料的至少第二部分（3），其中所述微球（1）包括作为第一部分的芯（2） 并且包括一种或多种染料和/或颜料，并且作为第二部分覆盖所述芯（2）的表面的至少一部分并且包含所述一种或多种磁性或可磁化材料的部分涂层（3）。

    METHODS FOR CREATING A MAGNETICALLY PERMEABLE FILM
    5.
    发明授权
    METHODS FOR CREATING A MAGNETICALLY PERMEABLE FILM 有权
    用于生产磁性膜渗透

    公开(公告)号：EP0970468B1

    公开(公告)日：2007-01-17

    申请号：EP99900095.3

    申请日：1999-01-18

    申请人： Koninklijke Philips Electronics N.V.

    发明人： BLOEMEN, Pascal, J., H. ,  RUIGROK, Jacobus, J., M.

    IPC分类号： G11B5/85 ,  H01F41/14

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  B82Y40/00 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3925 ,  G11B2005/3996 ,  H01F41/14 ,  H01F41/18 ,  H01F41/30

    摘要： A method for creating a magnetically permeable film (5) on a surface (3) by deposition of a magnetic material, during which deposition a magnetic field (H) is present near said surface, which field has a field direction which is substantially parallel to the surface. In order to tune the permeability of the magnetic material during deposition the method comprises the steps of: 1) building up the magnetically permeable film by forming a magnetically permeable layer (2, 4) formed by depositing a ferromagnetic material to a thickness (t1+t2), maximally corresponding to substantially 1/2 π Lex, where Lex is equal to √A/Ku with A being the exchange constant of the ferromagnetic material and Ku being the uniaxial anisotropy constant, and; 2) changing the field direction of the magnetic field, except a change over solely an angle of substantially 180°, during the forming of the magnetically permeable layer.

    METHODS FOR CREATING A MAGNETICALLY PERMEABLE FILM
    7.
    发明公开
    METHODS FOR CREATING A MAGNETICALLY PERMEABLE FILM 有权
    用于生产磁性膜渗透

    公开(公告)号：EP0970468A2

    公开(公告)日：2000-01-12

    申请号：EP99900095.3

    申请日：1999-01-18

    申请人： Koninklijke Philips Electronics N.V.

    发明人： BLOEMEN, Pascal, J., H. ,  RUIGROK, Jacobus, J., M.

    IPC分类号： G11B5/85 ,  H01F41/14

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  B82Y40/00 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3925 ,  G11B2005/3996 ,  H01F41/14 ,  H01F41/18 ,  H01F41/30

    摘要： A method for creating a magnetically permeable film (5) on a surface (3) by deposition of a magnetic material, during which deposition a magnetic field (H) is present near said surface, which field has a field direction which is substantially parallel to the surface. In order to tune the permeability of the magnetic material during deposition the method comprises the steps of: 1) building up the magnetically permeable film by forming a magnetically permeable layer (2, 4) formed by depositing a ferromagnetic material to a thickness (t1+t2), maximally corresponding to substantially 1/2 π Lex, where Lex is equal to √A/Ku with A being the exchange constant of the ferromagnetic material and Ku being the uniaxial anisotropy constant, and; 2) changing the field direction of the magnetic field, except a change over solely an angle of substantially 180°, during the forming of the magnetically permeable layer.