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    OPTICAL DEVICE AND METHOD OF MANUFACTURE THEREOF
    5.
    发明申请
    OPTICAL DEVICE AND METHOD OF MANUFACTURE THEREOF 有权

    公开(公告)号：US20220402292A1

    公开(公告)日：2022-12-22

    申请号：US17638463

    申请日：2020-10-09

    申请人： DE LA RUE INTERNATIONAL LIMITED

    发明人： Brian HOLMES ,  Frederic FOURNIER

    IPC分类号： B42D25/328 ,  G02B27/44 ,  G02B5/18 ,  B42D25/29 ,  B42D25/373 ,  B42D25/405

    摘要： A method for forming an optical device and an optical device, wherein upon illumination, exhibits diffractive images dependent upon viewing angle, the device having a diffractive structure including grating regions, each region corresponding to a component of a respective diffractive image, wherein: each region of the diffractive structure includes grating elements along a first direction having a principal orientation component within the device plane that is substantially orthogonal to the first direction; wherein, the grating elements within each grating region have a constant pitch and the same orientation wherein each grating region, upon illumination, exhibits a diffractive color wherein the corresponding diffractive image is exhibited; wherein, the diffractive structure includes first and second grating regions elongated along a common first direction, the regions being adjacent along the first direction, and wherein the pitch and/or orientation of the grating elements of the first and second grating regions are different.

    Documents and methods of manufacture thereof
    6.
    发明授权
    Documents and methods of manufacture thereof 有权

    公开(公告)号：US11458753B2

    公开(公告)日：2022-10-04

    申请号：US17278830

    申请日：2019-09-26

    申请人： DE LA RUE INTERNATIONAL LIMITED

    发明人： Mark Rowe ,  Stuart William John Rost

    IPC分类号： B42D25/351 ,  B41M3/14 ,  B42D25/29 ,  B42D25/318 ,  B42D25/405

    摘要： A method of manufacturing a document of a series identical documents in content except for a respective identifier which identifies each document within the series, each identifier having at least a first indicium, the or each indicium defining a boundary; the method having the steps of: providing a substrate; applying a first background print, defining part of the boundary of an indicium receiving area; applying the respective identifier on the substrate, such that the first indicium is provided in the indicium receiving area; the first background print and the respective identifier being applied such that when the document is viewed in at least one of transmission and reflection the juxtaposition of the first background print and the first indicium is such that a keyline extending around a portion of the boundary of the first indicium is defined between the first indicium and the boundary of the indicium receiving area.

    Method for making a security document comprising a thermoplastic substrate and UV-cured image and security document formed thereby
    7.
    发明授权
    Method for making a security document comprising a thermoplastic substrate and UV-cured image and security document formed thereby 有权

    公开(公告)号：US11273663B2

    公开(公告)日：2022-03-15

    申请号：US15734196

    申请日：2019-04-24

    申请人： Canadian Bank Note Company, Limited

    发明人： Laurence Suzzarini ,  David Cruikshank ,  Thivaharan Thurailingam

    IPC分类号： B42D25/387 ,  B42D25/405 ,  B42D25/45 ,  C09D11/101 ,  B42D25/351

    摘要： A method is provided by the invention for making a security document comprising a thermoplastic substrate with a UV light cured printed image that is less likely to result in splitting of the ink of the UV light cured printed image during the lamination step of forming the thermoplastic substrate. The UV light cured image is applied to an interior thermoplastic layer surface of a stack of thermoplastic layers configured to form a thermoplastic substrate upon lamination of the stack and comprises numerous small sub-portions having small gaps between them sufficient to permit relative movement of individual sub-portions during lamination, the thermoplastic layer(s) from the ultraviolet light cured image to an exterior surface of the stack being sufficiently see-through that the image is visible upon viewing the security document. Alternatively, or additionally, the image is applied to an interior surface of an outermost thermoplastic layer of the stack adjacent an intermediate thermoplastic layer of the stack wherein the outermost thermoplastic layer has a higher melting point than the melting point of at least the adjacent intermediate thermoplastic layer.

    METHOD FOR PRODUCING A SECURITY FEATURE
    10.
    发明申请
    METHOD FOR PRODUCING A SECURITY FEATURE 有权

    公开(公告)号：US20210379914A1

    公开(公告)日：2021-12-09

    申请号：US17283083

    申请日：2019-11-08

    申请人： Hueck Folien Gesellschaft m.b.H. ,  BANQUE DE FRANCE

    发明人： Martin EGGINGER ,  Martin BERGSMANN ,  Marco MAYRHOFER

    IPC分类号： B41M3/14 ,  B41M1/10 ,  B42D25/387 ,  B42D25/29 ,  B42D25/405

    摘要： The invention relates to a method for producing a security feature (1) in the form of a colored image (2), a colorant being applied to a substrate (3) to produce the image, the image (2) being subdivided into grid areas, immediately adjacent grid areas (4, 5, 6, 9, 10, 11) of the image (2) partially overlapping, an overlapping area (7, 8) of immediately adjacent grid areas (4, 5, 6, 9, 10, 11) being smaller than one of the grid areas (4, 5, 6, 9, 10, 11), grid areas (4, 5, 6, 9, 10, 11) of the image (2) being each assigned at least one color, and at least the areas of the substrate (3) corresponding to the respective grid areas (4, 5, 6, 9, 10, 11) minus the corresponding overlapping areas (7, 8) being covered with at least one colorant of the respectively assigned color, the overlapping areas (7, 8) between adjacent grid areas (4, 5, 6, 9, 10, 11) being covered at least with the colorant having the color assigned to one of the grid areas (4, 5, 6, 9, 10, 11) overlapping in the respective overlapping areas (7, 8).