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    Apparatuses and methods for printing security documents
    1.
    发明授权
    Apparatuses and methods for printing security documents 有权

    公开(公告)号：US12017469B2

    公开(公告)日：2024-06-25

    申请号：US17288368

    申请日：2019-10-25

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： Nikhil Parab ,  Andrew Francis Wallis ,  Martin Bannon

    IPC: B41M3/14 ,  B41J3/54 ,  B42D25/305 ,  B42D25/373 ,  B42D25/378

    CPC classification number: B41M3/144 ,  B41J3/543 ,  B41M3/14 ,  B42D25/305 ,  B42D25/378 ,  B42D25/373

    Abstract: A digital printing press for printing security documents is provided. The digital printing press comprises: a first digital print head, the first digital printhead comprising a first array of print nozzles having a first nozzle diameter; a second digital print head, the second digital print head comprising a second array of print nozzles having a second nozzle diameter different from the first nozzle diameter; optionally, an offset printing unit, the offset printing unit comprising one or more offset printing surfaces, wherein the offset printing unit is adapted to transport a print area of the one or more offset printing surfaces sequentially past each of the first and second digital print heads, and subsequently to transfer print received from the first and second digital print heads to a security document substrate; a transport system adapted to transport a security document substrate along a transport path through the digital printing press, wherein either the transport path takes the security document sequentially past each of the first and second digital print heads in a feed direction, or the transport path takes the security document substrate past the offset printing unit, if provided, in a feed direction; a controller adapted to control both the first and second digital print heads to execute a set of printing instructions so as to print on a security document substrate transported past the first and second digital print heads by the transport system or to print on the print area of the one or more offset printing surfaces transported past the first and second digital print heads by the offset printing unit (and to transfer the print received on the print area of the offset printing to the security document substrate), the set of printing instructions including printing instructions at a first resolution for the first digital print head for printing a first print working and printing instructions at a second resolution different from the first resolution for the second digital print head for printing a second print working; wherein the first digital print head is configured to print at the first resolution and the second digital print head is configured to print at the second resolution, and wherein the first and second digital print heads are configured or controlled by the controller to remain static relative to the transport path or offset printing unit while the first and second digital print heads execute the respective printing instructions.

    SECURITY ELEMENTS AND METHOD OF MANUFACTURE THEREOF
    2.
    发明公开
    SECURITY ELEMENTS AND METHOD OF MANUFACTURE THEREOF 审中-公开

    公开(公告)号：US20230202223A1

    公开(公告)日：2023-06-29

    申请号：US18117624

    申请日：2023-03-06

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： Brian HOLMES

    IPC: B42D25/29 ,  B42D25/324

    CPC classification number: B42D25/29 ,  B42D25/324 ,  B82Y20/00

    Abstract: A security element including a first layer having a first surface, an array of image regions across the surface, each including at least first and second sub-regions, a first array of plasmonic nanostructures in or on the surface across the first sub-regions, defining in each a corresponding portion of a first image, a second array across the second sub-regions, defining in each a corresponding portion of a second image; wherein each sub-region has a respective average inclination and the average inclinations of the first sub-regions are such that the first image is displayed at least at a first viewing angle and those of the second sub-regions are such that the second image is displayed at least at a second viewing angle different from the first and the second image is substantially not or only partially displayed at least at the first angle. Also, a method of manufacturing the security element.

    SECURITY DEVICES AND METHODS OF AUTHENTICATION THEREOF
    4.
    发明申请
    SECURITY DEVICES AND METHODS OF AUTHENTICATION THEREOF 有权

    公开(公告)号：US20210260909A1

    公开(公告)日：2021-08-26

    申请号：US17262831

    申请日：2019-08-05

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： Brian William HOLMES ,  Jonathan TONER

    IPC: B42D25/378 ,  C09D11/50 ,  B41M3/14

    Abstract: A security device includes a substrate and a photoluminescent image on or in the substrate. The image includes at least two different visible light emitting photoluminescent quantum dot compositions, each arranged according to different respective photoluminescent sub-images. The at least two different visible light emitting photoluminescent quantum dot compositions have different emission spectra from one another, and the same or different excitation spectra. The at least two different visible light emitting photoluminescent quantum dot compositions emit different respective visible colours from one another when excited. The respective photoluminescent sub-images are configured such that the photoluminescent image formed by the combination of the respective photoluminescent sub-images is multi-coloured, emitting different visible colours in different laterally offset parts thereof upon excitation of the at least two different visible light emitting photoluminescent quantum dot compositions. At least a portion of the photoluminescent image overlaps an at least semi-transparent region of the substrate.

    A SECURITY DEVICE AND METHOD OF MAKING THEREOF
    5.
    发明申请
    A SECURITY DEVICE AND METHOD OF MAKING THEREOF 有权

    公开(公告)号：US20210070090A1

    公开(公告)日：2021-03-11

    申请号：US16642250

    申请日：2018-08-28

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： John GODFREY ,  Rebecca LOCKE ,  Meagan DE LA BASTIDE

    IPC: B42D25/29 ,  B42D25/324

    Abstract: A security device and method of making thereof. The security device includes a colour shifting element that exhibits different colours dependent on the angle of incidence of light impinging upon the colour shifting element, and; an at least partially transparent light control layer covering at least a part of the colour shifting element and including a surface relief adapted to modify the angle of light incident upon the light control layer, wherein; the light control layer includes at least first and second functional regions having different refractive indices such that light incident upon the first functional region impinges upon the colour shifting element at a first angle of incidence, and light incident upon the second functional region impinges upon the colour shifting element at a second, different, angle of incidence.

    SECURITY ELEMENTS AND METHODS OF MANUFACTURE THEREOF
    6.
    发明申请
    SECURITY ELEMENTS AND METHODS OF MANUFACTURE THEREOF 有权

    公开(公告)号：US20210053380A1

    公开(公告)日：2021-02-25

    申请号：US17040393

    申请日：2019-03-22

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： Brian HOLMES

    IPC: B42D25/328 ,  B42D25/324 ,  G02B5/18

    Abstract: A security element including: a first layer having a first surface; an array of image regions across the surface, each region including at least first and second sub-regions; a first diffractive optically variable effect generating structure in or on the surface across the first sub-regions; and a second diffractive optically variable effect generating structure in or on the surface across the second sub-regions; wherein the surface is arranged so each first sub-region has a first average inclination and each second sub-region has a second average inclination different from the first, wherein the first structure and inclination provide that the first effect is exhibited across the first sub-regions at least at a first viewing angle and the second structure and inclination provide that the second effect is exhibited across the second sub-regions at least at a second viewing angle different from the first. Also, a method of manufacturing the security element.

    Method of forming a security sheet substrate
    7.
    发明授权
    Method of forming a security sheet substrate 有权

    公开(公告)号：US10759214B2

    公开(公告)日：2020-09-01

    申请号：US16482890

    申请日：2018-01-31

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： John Godfrey ,  Rebecca Locke

    IPC: B42D25/425 ,  B42D25/46 ,  B42D25/455 ,  B42D25/351 ,  B42D25/324 ,  B42D25/23 ,  B42D25/24 ,  B42D25/328 ,  B42D25/364 ,  B42D25/373 ,  B42D25/378 ,  B42D25/435 ,  B42D25/475

    Abstract: A method of forming a polymer substrate for a security sheet includes: providing first and second overlapping polymer layers each providing outwardly facing surfaces, and a colour shifting element positioned between the first and second polymer layers adapted to provide a first optical effect to a viewer, wherein the first polymer layer includes a region substantially transparent to visible light such that the colour shifting element is viewable through the first polymer layer, and; joining together the first and second polymer layers in order to generate a polymer substrate wherein, during the joining step, a surface relief is formed in the outwardly facing surface of the first layer, the surface relief being adapted to interact with light from the colour shifting element in order to modify the first optical effect to provide a second optical effect different from the first optical effect.

    SECURITY DEVICE AND METHOD OF MANUFACTURE THEREOF
    8.
    发明申请
    SECURITY DEVICE AND METHOD OF MANUFACTURE THEREOF 审中-公开

    公开(公告)号：US20200223245A1

    公开(公告)日：2020-07-16

    申请号：US16651085

    申请日：2018-09-27

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： Brian HOLMES

    IPC: B42D25/373 ,  B42D25/355 ,  B42D25/328 ,  B42D25/324 ,  G03H1/00 ,  G03H1/02 ,  C09D11/037 ,  C09D11/322 ,  C09D11/50

    Abstract: A method of forming a security device includes selectively providing a high refractive index (HRI) layer to a first outwardly facing surface of a security device substrate, the HRI layer having a substantially transparent host material and particles having a dimension along at least one axis less than 200 nm, such that they are substantially non-scattering to visible light and the HRI layer is substantially transparent to visible light, and wherein; the particles have a refractive index of at least 1.8 and are present within the host material in a proportion such that the resultant refractive index of the HRI layer is at least 1.6. A corresponding security device, as well as security articles and security documents, are also disclosed.

    Security device and method of manufacture
    9.
    发明授权
    Security device and method of manufacture 有权

    公开(公告)号：US10549569B2

    公开(公告)日：2020-02-04

    申请号：US15552732

    申请日：2016-03-10

    Applicant: DE LA RUE INTERNATIONAL LIMITED

    Inventor： Brian William Holmes ,  Lawrence George Commander

    IPC: B42D25/29 ,  G02B3/00 ,  G02B27/22 ,  B42D25/30 ,  B41M3/14

    Abstract: A security device includes: an elongate focusing structures array, the elongate axes are aligned along a first-direction, the elongate focusing structures parallel to one another periodically along a second-direction is orthogonally to the first-direction, each elongate focusing structure having an optical footprint of different elongate strips will be directed to the viewer in dependence on the viewing angle, the centre line of each optical footprint parallel with the first-direction; image elements-array overlapping the array of elongate focusing structures, the image elements-array representing elongate image slices of at least two respective images, each image slice including one or more image elements, and at least one image slice of each respective image in the optical footprint of each elongate focusing structure. The image elements-array is configured so the distance in the second-direction of each image slice from the centre line of an optical footprint in the image slice changes along the first-direction.

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