EP3792073A1 - Procédé d'estampage permettant d'estamper des micro- ou nanostructures - Google Patents

Procédé d'estampage permettant d'estamper des micro- ou nanostructures Download PDF

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Publication number
EP3792073A1
EP3792073A1 EP20020437.8A EP20020437A EP3792073A1 EP 3792073 A1 EP3792073 A1 EP 3792073A1 EP 20020437 A EP20020437 A EP 20020437A EP 3792073 A1 EP3792073 A1 EP 3792073A1
Authority
EP
European Patent Office
Prior art keywords
lacquer layer
structures
embossing
film web
lacquer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20020437.8A
Other languages
German (de)
English (en)
Other versions
EP3792073B1 (fr
Inventor
Andreas Rauch
Frank Sievers
Georg Kiefersauer
Birgit Seiß
Christian Fuhse
Andreas Pretsch
Michael Rahm
Manfred Heim
Winfried HOFFMÜLLER
Herbert ZASCHKA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3792073A1 publication Critical patent/EP3792073A1/fr
Application granted granted Critical
Publication of EP3792073B1 publication Critical patent/EP3792073B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/024—Work piece loading or discharging arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/24—Pressing or stamping ornamental designs on surfaces

Definitions

  • the invention relates to a method for embossing structures with dimensions in the range of micrometers or nanometers in a lacquer layer composed of a lacquer, the lacquer layer being applied to one side of a film web and being curable by means of ultraviolet radiation.
  • the film web is first pressed with the side on which the not yet hardened lacquer layer is located by an impression roller against an embossing cylinder, on the surface of which the structures to be embossed are located in the micro or nanometer range.
  • the structures are formed in the micro or nanometer range in the lacquer layer.
  • the lacquer layer is then cured by ultraviolet radiation from a source of ultraviolet radiation.
  • the structures in the micrometer or nanometer range are thus embossed into an unevenly distributed lacquer layer, and even after the embossing and subsequent hardening of the lacquer layer by means of UV radiation, an unevenly thick and in the horizontal direction, based in each case on the film web, unevenly distributed lacquer layer with embossed structures in the micrometer or nanometer range results.
  • a method for producing a security element which consists of two components. Both components must be arranged in exact register or register to one another, an adjustable stretching roller being provided for maintaining or setting this register.
  • the second components of the security element are preferably produced by an embossing unit.
  • WO 2011/020727 A1 discloses a method of producing an optically variable image in which an epoxy paint can be heated for application to a web, thereby reducing its viscosity. The viscosity of the lacquer will have changed or increased again by cooling down by the time the stamping process takes place.
  • the object of the invention is to control the width of the lacquer layer on the film web after embossing or to control compliance with a predetermined value of this width.
  • the invention relates to a method according to the preamble of the main claim, whereby, according to the invention, additional structures or microstructures are at least partially, preferably over the entire surface, additional structures or microstructures in the surface of the vellum area at the edge of the embossing cylinder, in which there are no structures to be embossed in the micro or nanometer range for the embossed end products be introduced.
  • the vellum area is no longer flawlessly transferred to the lacquer layer on the film web, but the part of the film web embossed by the vellum area is scrap anyway and is cut off and disposed of, so that structures or microstructures in this area have no influence on the later end products.
  • the additional structures or microstructures have a higher lacquer requirement due to their larger surface, so that the range of variation in the width of the lacquer layer after embossing is reduced.
  • the additional structures or microstructures make the lacquer edge of the transparent lacquer, which cannot be recognized per se, recognizable, i.e. the edge of the lacquer layer on the film web on the outer left or right edge of the lacquer layer, by increasing the scattering or absorption or a noticeable change in the Lead reflection of the light incident on the paint layer.
  • the additional structure can be designed in the form of a checkerboard pattern with a dimension of the individual fields of 10 ⁇ m each, which optically leads to a matting of the lacquer compared to an unstructured, smooth surface.
  • the additional structures can also consist of micromirrors or diffractive structures, which lead to a matting of the surface of the lacquer or a direction-dependent reflection of the incident light.
  • the inventive control of the width of the lacquer layer on the film web after embossing or compliance with a predetermined value of this width can take place independently of the direction in which the film web is fed to the embossing cylinder, i.e. both when the film web is fed in from above or at least obliquely from above to the embossing cylinder as well as in the case of a feed of the film web known from the prior art from below or at least obliquely from below to the embossing cylinder.
  • the position of the lacquer edge on the film web after the embossing is determined via an optical system which, for example, consists of at least one light barrier or a camera system.
  • a light barrier is arranged over the lacquer layer of the film web in the conveying direction of the film web after the embossing cylinder, the light barrier being arranged over the lacquer layer of the film web in such a way that it monitors the area outside or beyond the lacquer edge in which there is no lacquer layer on the film web should be.
  • the light emitted by the light barrier should therefore hit the smooth, reflective surface of the film web without a lacquer layer if the web speed is set correctly so that the detector of the light barrier displays a first value. If the web speed is set too low, the width of the lacquer layer increases beyond the specified amount after the embossing and the lacquer edge shifts in the direction of the outer edge of the film web.
  • the light emitted by the light barrier then hits the surface of the lacquer layer which is embossed and, for example, matted by the additional structures or microstructures. Less light is reflected back to the detector of the light barrier than with the smooth, reflective surface of the film web without a lacquer layer, so that the detector of the light barrier displays a second value that is different from the first value. This second value is the signal for the control to increase the web speed until the detector of the light barrier shows the first value again.
  • a second light barrier can be arranged in such a way that it monitors the area within or on this side of the lacquer edge in which the lacquer layer is to be arranged on the film web.
  • the detector of this light barrier should therefore receive the second value of the show additional structures or microstructures embossed and for example matted surface of the lacquer layer. If it shows the first value of the smooth, reflective surface of the film web without a lacquer layer, the width of the lacquer layer is too small and the web speed must be reduced until the detector of this light barrier shows the second value again.
  • detection can also take place along a line perpendicular to the paint edge. This is done, for example, by means of a camera system that evaluates the image along the line perpendicular to the paint edge. Such an evaluation advantageously also permits the evaluation of trends and thus enables predictive intervention.
  • the sensor or the camera system must be triggered, for example by means of the signal from an additional double wedge mark or by means of a rotary encoder on the embossing cylinder.
  • a film web consists for example of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP) or polycarbonate (PC) with a thickness for security threads or security films of preferably 8 ⁇ m to 36 ⁇ m, for banknotes made of polymer or for composite banknotes up to 100 ⁇ m or for card bodies up to 200 ⁇ m.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PP polypropylene
  • PC polycarbonate
  • the thickness of the lacquer layer is preferably 0.5 ⁇ m to 20 ⁇ m, particularly preferably 4 ⁇ m to 15 ⁇ m and very particularly preferably 4 ⁇ m to 8 ⁇ m.
  • the lacquer layer is preferably applied to the film web by means of a flexographic printing process.
  • the film is perpendicular or at least almost perpendicular from above or in the direction of the weight force or is fed almost in the direction of the weight on the embossing cylinder.
  • At least obliquely from above in the context of this invention means that the film is fed onto the embossing cylinder at an angle in a range from more than horizontally to almost vertically from above, the film in particular not being fed horizontally onto the embossing cylinder.
  • Such structures with dimensions in the range of micrometers or nanometers are used in particular to increase the protection against forgery of documents of value, in particular banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, as well Cards, such as credit or debit cards, and also product security elements such as labels, seals, packaging and the like.
  • the structures with dimensions in the range of micrometers or nanometers are, for example, diffractive structures, micromirrors, matt structures or moth-eye structures.
  • Fig. 1 shows a plan view of the edge area of a lacquer layer 6 on a film web 5 after embossing for detection of the lacquer edge by two light barriers.
  • Fig. 2 shows the item Fig. 1 in side view along the section plane LL.
  • a first light barrier 18, consisting of a light source 18.1 and a detector 18.2, is arranged above the lacquer layer 6 of the foil web 5 in the conveying direction of the foil web 5 after the embossing cylinder 1, so that along a line 16 it covers the area 13 outside or beyond the lacquer edge 15 monitored, in which no lacquer layer should be arranged on the film web 5.
  • the light emitted by the light source 18.1 thus hits the smooth, reflective surface of the film web without a layer of lacquer if the web speed is set correctly so that the detector 18.2 displays a first value.
  • a second light barrier 19, consisting of a light source 19.1 and a detector 19.2, is arranged in such a way that it monitors the area 14 within or this side of the lacquer edge 15 along a line 17 in which the lacquer layer 6 is to be arranged on the film web 5.
  • the area 12 there are the additional structures or microstructures in the vellum area of the embossing cylinder, which are only embossed in the lacquer layer 6 in the area 14.
  • the detector 19.2 displays the second value, which is embossed by the additional structures or microstructures and, for example, matted surface 14 of the lacquer layer 6, which is different from the first value.
  • Fig. 3 shows a plan view of the edge area of a lacquer layer on a film web after embossing for a detection of the lacquer edge by a camera system.
  • a detection takes place along a line 20 perpendicular to the lacquer edge 15. This detection takes place, for example, by means of a camera system which evaluates the image along the line 20 by determining the gloss values of the corresponding surfaces.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
EP20020437.8A 2015-11-27 2016-11-18 Procédé d'estampage permettant d'estamper des micro- ou nanostructures Active EP3792073B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015015407.9A DE102015015407A1 (de) 2015-11-27 2015-11-27 Prägeverfahren zum Prägen von Mikro- oder Nanostrukturen
EP16798626.4A EP3380334B1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage de microstructures ou de nanostructures
PCT/EP2016/001922 WO2017088964A2 (fr) 2015-11-27 2016-11-18 Procédé d'estampage de microstructures ou de nanostructures

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP16798626.4A Division-Into EP3380334B1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage de microstructures ou de nanostructures
EP16798626.4A Division EP3380334B1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage de microstructures ou de nanostructures

Publications (2)

Publication Number Publication Date
EP3792073A1 true EP3792073A1 (fr) 2021-03-17
EP3792073B1 EP3792073B1 (fr) 2024-05-15

Family

ID=57389366

Family Applications (3)

Application Number Title Priority Date Filing Date
EP16798626.4A Active EP3380334B1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage de microstructures ou de nanostructures
EP20020437.8A Active EP3792073B1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage permettant d'estamper des micro- ou nanostructures
EP20020436.0A Ceased EP3792072A1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage permettant d'estamper de micro- ou nanostructures

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16798626.4A Active EP3380334B1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage de microstructures ou de nanostructures

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20020436.0A Ceased EP3792072A1 (fr) 2015-11-27 2016-11-18 Procédé d'estampage permettant d'estamper de micro- ou nanostructures

Country Status (4)

Country Link
EP (3) EP3380334B1 (fr)
CN (2) CN108472981B (fr)
DE (1) DE102015015407A1 (fr)
WO (1) WO2017088964A2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010042999A1 (fr) * 2008-10-17 2010-04-22 Securency International Pty Ltd Procédé et appareil d’enregistrement pour éléments imprimés et estampés
WO2011020727A1 (fr) 2009-08-21 2011-02-24 Basf Se Appareil et procédé pour un dispositif de support d'image variable optiquement et sub-microscopique
DE102011009135A1 (de) * 2011-01-21 2012-07-26 Heidelberger Druckmaschinen Ag Druckmaschine
EP2865625A1 (fr) 2013-10-25 2015-04-29 Giesecke & Devrient GmbH Procédé et dispositif de fabrication d'un élément de sécurité

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2244324A1 (fr) * 1997-08-04 1999-02-04 Hsm Holographic Systems Munchen Gmbh Methode et appareil de fabrication d'une structure de surface sur un substrat, particulierement une surface holographique
DE19802585A1 (de) * 1997-08-04 1999-03-25 Hsm Gmbh Verfahren und Vorrichtung zur Erzeugung einer Oberflächenstruktur, insbesondere einer holographischen Oberflächenstruktur, auf einem Substrat
EP1362682A1 (fr) 2002-05-13 2003-11-19 ZBD Displays Ltd, Appareil et méthode pour l'alignement de cristaux liquides
EP1580015A1 (fr) * 2004-03-24 2005-09-28 Kba-Giori S.A. Procédé et appareil permettant d'effectuer un marquage d'identité sur documents de sécurité
EP1720079A1 (fr) * 2005-05-06 2006-11-08 Neopack, Sl Composition colorée comprenant un hologramme et procédé de fabrication
CN101557945B (zh) * 2006-09-15 2011-11-16 证券票据国际私人有限公司 用于安全文件的辐射可固化压印油墨安全标识
KR20100113918A (ko) * 2009-04-14 2010-10-22 이용근 한지공예품의 양각문양형성방법 및 이를 이용하여 제조된 양각문양이 형성된 한지공예품
WO2013186167A2 (fr) * 2012-06-14 2013-12-19 Basf Se Procédé destiné à fabriquer des éléments de sécurité et des hologrammes
CA2948284A1 (fr) * 2014-05-15 2015-11-19 Innovia Security Pty Ltd Fabrication en ligne de documents comprenant des elements de securite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010042999A1 (fr) * 2008-10-17 2010-04-22 Securency International Pty Ltd Procédé et appareil d’enregistrement pour éléments imprimés et estampés
WO2011020727A1 (fr) 2009-08-21 2011-02-24 Basf Se Appareil et procédé pour un dispositif de support d'image variable optiquement et sub-microscopique
DE102011009135A1 (de) * 2011-01-21 2012-07-26 Heidelberger Druckmaschinen Ag Druckmaschine
EP2865625A1 (fr) 2013-10-25 2015-04-29 Giesecke & Devrient GmbH Procédé et dispositif de fabrication d'un élément de sécurité

Also Published As

Publication number Publication date
CN108472981B (zh) 2020-05-19
WO2017088964A3 (fr) 2017-07-20
DE102015015407A1 (de) 2017-06-01
EP3380334A2 (fr) 2018-10-03
EP3380334B1 (fr) 2022-07-27
WO2017088964A2 (fr) 2017-06-01
CN111497492A (zh) 2020-08-07
CN108472981A (zh) 2018-08-31
CN111497492B (zh) 2022-03-08
EP3792073B1 (fr) 2024-05-15
EP3792072A1 (fr) 2021-03-17

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