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    Process for producing optical effect layers
    1.
    发明授权
    Process for producing optical effect layers 有权

    公开(公告)号：US11618053B2

    公开(公告)日：2023-04-04

    申请号：US17422166

    申请日：2019-12-27

    Applicant: SICPA HOLDING SA

    Inventor： Evgeny Loginov ,  Mathieu Schmid ,  Edgar Mueller ,  Claude-Alain Despland

    IPC: B05D5/06 ,  B05D3/06 ,  B05D3/00

    Abstract: The present invention relates to the field of protecting value documents and value commercial goods against counterfeit and illegal reproduction. In particular, the present invention provides processes for producing optical effect layers (OELs) comprising non-spherical magnetic or magnetizable particles and comprising a motif made of at least two areas made of a single applied and cured layer, said motif being obtained by using a selective curing performed by irradiation with an actinic radiation LED source (x41) comprising an array of individually addressable actinic radiation emitters.

    Magnetic or magnetisable pigment particles and optical effect layers
    5.
    发明授权
    Magnetic or magnetisable pigment particles and optical effect layers 有权

    公开(公告)号：US10279618B2

    公开(公告)日：2019-05-07

    申请号：US14910091

    申请日：2014-07-25

    Applicant: SICPA HOLDING SA

    Inventor： Pierre Degott ,  Mathieu Schmid ,  Claude-Alain Despland ,  Cédric Amerasinghe

    IPC: B42D25/00 ,  B42D25/369 ,  C09C1/62 ,  C09D5/36 ,  C09D5/38 ,  B41M1/42 ,  B41M3/14 ,  B42D25/378 ,  D21H21/48 ,  C09D7/62 ,  B05D3/00 ,  B05D5/06 ,  B41M7/00

    Abstract: The invention relates to the field of non-spherical magnetic or magnetisable pigment particles and coating compositions comprising those pigment particles for producing optical effect layers (OEL) wherein the magnetic or magnetisable pigment particles are magnetically oriented. In particular, the present invention provides uses of said optical effect layers (OEL) layers as anti-counterfeit means on security documents or security articles. In particular, it relates to the field of non-spherical magnetic or magnetisable pigment particles comprising a magnetic metal selected from the group consisting of cobalt, iron, gadolinium and nickel; a magnetic alloy of iron, manganese, cobalt, nickel, or a mixture of two or more thereof; a magnetic oxide of chromium, manganese, cobalt, iron, nickel or a mixture of two or more thereof; or a mixture of two or more thereof, and having a d50 value higher than 6 μm and lower than 13 μm, their uses in coating compositions comprising a binder material for producing an optical effect layer (OEL), OEL obtained thereof and processes for producing said OEL.

    Method for authenticating a magnetically induced mark with a portable device
    7.
    发明授权
    Method for authenticating a magnetically induced mark with a portable device 有权

    公开(公告)号：US11823003B2

    公开(公告)日：2023-11-21

    申请号：US17434704

    申请日：2020-02-10

    Applicant: SICPA HOLDING SA

    Inventor： Todor Dinoev ,  Jean-Luc Dorier ,  Edmund Halasz ,  Evgeny Loginov ,  Claude-Alain Despland ,  Andrea Callegari

    IPC: G06K7/14 ,  G07D7/12 ,  B42D25/369

    CPC classification number: G06K7/1417 ,  G06K7/1413 ,  G07D7/12 ,  B42D25/369 ,  G07D2207/00

    Abstract: The invention relates to a method of authenticating a magnetically induced mark applied on a substrate including magnetically oriented partially reflective platelet-shaped magnetic or magnetizable pigment particles, with a portable device equipped with a light source operable to deliver visible light, an imager, a processor and a memory, the method comprising calculating, with the processor, a corresponding average intensity I of the light reflected by the partially reflective platelet-shaped magnetic or magnetizable pigment particles and collected by the imager at corresponding viewing angle θ, storing the calculated average intensities of the reflected light and corresponding viewing angles to obtain a reflected light intensity curve I(θ), comparing the stored reflected light intensity curve I(θ) with a stored reference reflected light intensity curve Iref(θ) for said magnetically induced mark, and determining whether the magnetically induced mark is genuine based on a result of the comparison.

    Processes for producing effects layers
    9.
    发明授权
    Processes for producing effects layers 有权

    公开(公告)号：US10933442B2

    公开(公告)日：2021-03-02

    申请号：US15103565

    申请日：2014-11-14

    Applicant: SICPA HOLDING SA

    Inventor： Mathieu Schmid ,  Claude-Alain Despland ,  Evgeny Loginov ,  Cedric Amerasinghe ,  Pierre Degott

    IPC: B05D3/00 ,  B05D5/06 ,  H01F41/16 ,  B42D25/29 ,  B42D25/369 ,  B42D25/378

    Abstract: The disclosure relates to the field of the protection of security documents, such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the present disclosure provides processes for producing optical effect layers (OELs) on a substrate and OELs obtained thereof, said process including two magnetic orientation steps: a step of exposing a coating composition having platelet-shaped magnetic or magnetisable pigment particles to a dynamic magnetic field of a first magnetic-field-generating device so as to bi-axially orient at least a part of the platelet-shaped magnetic or magnetisable pigment particles, and a step of exposing the coating composition to a static magnetic field of a second magnetic-field-generating device, thereby mono-axially re-orienting at least a part of the platelet-shaped magnetic or magnetisable pigment particles.

    Devices for producing optical effect layers
    10.
    发明授权
    Devices for producing optical effect layers 有权

    公开(公告)号：US10391519B2

    公开(公告)日：2019-08-27

    申请号：US15101717

    申请日：2014-11-28

    Applicant: SICPA HOLDING SA

    Inventor： Pierre Degott ,  Mathieu Schmid ,  Claude-Alain Despland ,  Evgeny Loginov ,  Edgar Mueller

    IPC: B42D25/40 ,  B42D25/485 ,  B05D3/00 ,  B05D5/06 ,  H01F41/16 ,  B41M3/14

    Abstract: The present invention relates to the field of the protection of value documents and value commercial goods. In particular, the invention relates to methods of making an optical effect layer (OEL) associated with a substrate, the method comprising i) providing a substrate associated with a coating composition comprising magnetic or magnetizable pigment particles; ii) providing a permanent magnet assembly producing a first magnetic field; iii) providing an electromagnet assembly including a winding assembly and drive producing an oscillating or rotating second magnetic field that interacts with the first magnetic field to spin the permanent magnet assembly to rotate the first magnetic field; and iv) applying the first magnetic field while the first magnetic field rotates by spinning of the permanent magnet assembly to aggregately orient the magnetic or magnetizable pigment particles to create the optical effect layer. The invention also relates to apparatuses for creating an OEL.

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