EP2753754B2 - Procédé de fabrication d'un papier de sécurité et fil à microlentilles - Google Patents

Procédé de fabrication d'un papier de sécurité et fil à microlentilles Download PDF

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Publication number
EP2753754B2
EP2753754B2 EP12769595.5A EP12769595A EP2753754B2 EP 2753754 B2 EP2753754 B2 EP 2753754B2 EP 12769595 A EP12769595 A EP 12769595A EP 2753754 B2 EP2753754 B2 EP 2753754B2
Authority
EP
European Patent Office
Prior art keywords
thread
microlens
paper web
areas
microlens thread
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.)
Active
Application number
EP12769595.5A
Other languages
German (de)
English (en)
Other versions
EP2753754B1 (fr
EP2753754A2 (fr
Inventor
Rudolf Seidler
Manfred Heim
Bernhard Wiedner
Michael Rahm
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
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Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP2753754A2 publication Critical patent/EP2753754A2/fr
Publication of EP2753754B1 publication Critical patent/EP2753754B1/fr
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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
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/42—Ribbons or strips
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • B42D2033/22—
    • B42D2033/24—
    • B42D2035/20—
    • 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
    • B42D25/346—Perforations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core

Definitions

  • the invention relates to a method for producing a security paper.
  • Security elements for protection are often provided with security elements for protection, which allow the authenticity of the document of value to be checked and at the same time serve as protection against unauthorized reproduction.
  • the security elements can be designed, for example, in the form of a security thread that is fully or partially embedded in a banknote.
  • microlens filaments differ significantly from metallized filaments and offer attractive optical properties.
  • the microlens threads are equipped with microlenses on the side facing the viewer, the focusing effect of which is created by refraction of light on an almost spherically curved surface.
  • Microstructures are located in the focal plane of the microlenses, which are arranged in such a way that the interaction of the microlenses and the microstructures allows the viewer to display an enlarged image with special movement effects.
  • the lens side of the thread is not provided with adhesive before embedding it in a paper web, as is the case with conventional security threads such as hologram threads the case is.
  • glue on the upper side of the thread often leads to reduced durability of the banknotes produced and sometimes even to creases forming on the back of the banknote.
  • the invention is based on the object of avoiding the disadvantages of the prior art and in particular of specifying a method for producing security paper that enables a microlens thread to be securely embedded in the paper and at the same time in the window areas in which the microlens thread is attached to the surface of the paper, ensuring an attractive visual appearance of the microlens thread.
  • a registered introduction of the microlens thread can, in particular, according to one of the documents WO 2004/050991 A1 described procedures. To this extent, the disclosure content of this publication is included in the present application.
  • the microlens thread may contain a motif with a motif jump.
  • an endless security element film is usually first produced as roll material, with the use of conventional production methods always causing breakage, in particular gaps or an offset in the appearance of the security elements.
  • Preliminary products for the embossing tools used in production are generally produced as flat plates that are mounted on a printing or embossing cylinder.
  • the mutually adjacent image patterns generally do not match and, after printing or embossing, result in a motif jump of the type mentioned in the appearance of the finished security elements.
  • a microlens thread containing a motif with a motif jump is registered in the paper web introduced so that the motif jump comes to rest in one of the web areas of the paper web. The jump in motif then remains hidden from the viewer.
  • Motif jumps may also occur several times within an embossing cylinder. For example, if the patterns are assembled from small segments by means of recombination, seams with motif jumps result. In general, motif jumps occur due to the process, both in the grid of the microstructures and in the grid of the microlenses. Usually, an attempt is made to overlap the two seams during production, so that the viewer gets the impression of only one jump in the motif.
  • the microlens thread is printed directly before it enters the paper web with an adhesive layer in the areas of its upper side that come to lie below web areas of the paper web during sheet formation.
  • the microlens thread can contain a motif with a motif jump and the microlens thread can be introduced in a registered manner, so that the motif jump comes to rest in one of the web areas of the paper web and is therefore hidden from the viewer.
  • the microlens thread is provided with openings in the areas of its upper side directly before entering the paper web, which come to lie below web areas of the paper web during sheet formation.
  • the openings are advantageously produced by punching or laser cutting. If the openings are only produced immediately before the microlens thread enters the paper web, they are preferably produced by laser cutting.
  • the paper web is suitably formed with the predetermined land pattern in a paper machine and the continuous microlens thread enters the paper machine.
  • a microlens thread is provided, the upper side of which has subareas with microlenses and microlens-free subareas, the microlens-free subareas being smaller than the width of the land areas of the land pattern in the paper web, and wherein the microlens-free portions are coated with adhesive prior to incorporation into the paper web.
  • the microlens thread is introduced into the paper web in an unregistered manner, so that microlenses can be seen at least in certain areas in each window area and a part of the adhesive-coated subareas always comes to lie below the web areas of the paper web.
  • a microlens thread is provided which, on the one hand, has partial areas with microlenses, which partial areas are coated with adhesive before being introduced into the paper web and which are smaller than the width of the land areas of the land pattern in the Are paper web, and on the other hand has partial areas with microlenses that are not coated with adhesive before being introduced into the paper web.
  • the microlens thread is introduced into the paper web in an unregistered manner, so that in each window area at least some microlenses that do not have an adhesive coating can be seen and some of the adhesive-coated partial areas always come to lie below the web areas of the paper web.
  • the microlens thread is advantageously provided with an adhesive layer over its entire surface before it is introduced into the paper web.
  • the disclosure also relates to a microlens thread for introduction into a paper web, in particular with the method just described.
  • the microlens thread includes a top surface and an opposite bottom surface, with the top surface having microlens-bearing portions and microlens-free portions coated with adhesive.
  • the partial areas with microlenses and the microlens-free partial areas advantageously form alternating strips on the upper side of the thread, which each completely occupy the width of the microlens thread and which in the longitudinal direction of the microlens thread each have an extent of between 1 mm and 30 mm, preferably between 3 mm and 12 mm.
  • the partial areas with microlenses and the microlens-free partial areas can usually be in the form of rectangles. However, it would also be possible for the partial areas with microlenses and the partial areas without microlenses to be present in the form of diagonals. Diagonal paper webs can be produced, especially with wider threads.
  • the underside of the microlens thread is preferably coated with adhesive over its entire surface.
  • figure 1 shows a schematic representation of a bank note 10 produced according to the invention with a micro-optical window security thread 12, which is also referred to below as a micro-lens thread for short.
  • the microlens thread 12 occurs in window areas 14 on the surface of the bank note 10 protrudes while being embedded in the intermediate land areas 16 inside the banknote 10 .
  • microlens thread 12 for the production of a security paper in the figures 2 and 4 illustrated microlens thread 12 is used.
  • figure 3 shows a cross section of the security paper 50 with the microlens thread 12 already embedded.
  • the microlens thread runs, for example, in endless form into a paper machine and is embedded there in a paper web forming on a cylinder mold.
  • the paper web together with the embedded microlens thread is referred to as security paper in this description.
  • figure 2 shows schematically the layer structure of the microlens thread 12 before embedding in the security paper, only the parts of the layer structure required for explaining the functional principle being shown.
  • figure 4 shows a plan view of the microlens thread 12 of FIG 2 .
  • the microlens thread 12 contains a carrier 20 in the form of a transparent plastic film, for example a PET film approximately 20 ⁇ m thick.
  • the upper side 30 of the microlens thread 12 has a grid-like arrangement of microlenses 22 which form a grid with a preselected symmetry on the surface of the carrier film.
  • the spherically or aspherically designed microlenses 22 preferably have a diameter between 5 ⁇ m and 50 ⁇ m and in particular a diameter between only 10 ⁇ m and 35 ⁇ m and are therefore not visible to the naked eye. It goes without saying that larger or smaller dimensions are also possible in other configurations. The use of cylindrical lenses is also possible in the same way.
  • a motif layer 26 which also contains a grid-like arrangement of micromotif elements 28 .
  • the arrangement of the micromotif elements 28 also forms a lattice with a preselected symmetry, a desired magnification effect, characteristic movement effects and/or tilting effects being produced by matching the lattice of the microlenses 22 and the arrangement of the micromotif elements 28 .
  • the micro motif elements cannot be seen with the naked eye.
  • the WO 2009/000528 A1 referenced which states that the microstructures can also consist of image fragments that are not arranged in a repeating manner.
  • the microlens thread 12 typically contains other layers 24, such as protective, covering or other functional layers, which are not essential to the present invention and are therefore not described in detail.
  • the motif perceived by the viewer will usually have a motif jump, such as in the printed text WO 2008/145333 A2 described in more detail.
  • the ridge pattern 18 has ridge areas 16 in which the microlens thread 12 is later embedded in the interior of the finished paper web 50 . Between the web areas 16 are window areas 14, in which the microlens thread 12 emerges on the surface of the finished paper web 50 .
  • the microlens thread 12 is provided with an adhesive layer 40 in the shape of the web pattern 18 on its upper side 30 before it is introduced into the paper web 50, so that the adhesive layer 40 forms an adhesive pattern 48 whose sequence of uncoated areas 44 and coated areas 46 of the Sequence of the window areas 14 and land areas 16 of the land pattern 18 corresponds.
  • the underside 32 of the microlens thread 12 is provided with a full-surface adhesive layer 42 .
  • This microlens thread 12 coated with adhesive 40, 42 is now registered in the paper web 50, so that the areas 46 of the microlens thread coated with adhesive coincide with the web areas 16 of the paper web 50, as in FIG 3 shown.
  • the microlens thread 12 can be introduced into the paper web under pretension by means of a coil.
  • a first sensor detects the position of the coated areas 46 shortly before they are introduced into the paper web, and a second sensor detects the position of the webs 16 formed in the paper web immediately after the sheet is formed.
  • the positions detected by the two sensors are evaluated and used to control the magnitude of the preload.
  • the prestress is increased, the microlens thread 12 is stretched to a greater extent, and when the prestress is lowered, the stretch is reduced.
  • the microlens thread 12 can be used in this way with its coated and uncoated areas 44, 46 in register with the window and land areas 14, 16.
  • the procedure is preferably such that the thread carries a register mark which is recognized particularly well by a detection system.
  • the embedding of the thread is then controlled by means of the tension on the thread in such a way that the register mark of the thread is in a fixed spatial relation to the register mark of the paper, usually a watermark mark.
  • the areas in which the thread has adhesive on the upper side are then in a fixed, known local relationship to the register mark of the thread.
  • the land areas in the paper are in a fixed spatial relationship to the register mark in the paper.
  • This procedure ensures that the web areas 16 of the paper web 50 are glued to the microlens thread 12, so that a secure embedding of the microlens thread 12 is guaranteed without wrinkling and without lifting or tearing of the paper webs during production.
  • the stability of the paper webs against circulating stresses is also significantly improved.
  • the microlenses 22 of the uncoated areas 44 visible in the window areas 14 remain free of adhesive, so that the optical properties of the microlenses 22 are not impaired.
  • the microlens thread 12 therefore exhibits the desired clear visual appearance in the window areas 14 after it has been embedded in the paper web 50 .
  • the uncoated areas 44 and the coated areas 46 have the same size as the window areas 14 or the web areas 16. In some configurations, too It is envisaged that the coated areas 46 be smaller, e.g. no more than 10% or no more than 50% smaller than the land areas 16. How much the glue-coated part should be shorter compared to the paper lands of the thread also depends heavily the register tolerance for registered thread embedding. For example, with a register tolerance of ⁇ 1 mm in the registered thread insertion, the areas of the thread that are free of adhesive should be 2 mm shorter than the paper webs. Even if in each case only part of the microlens thread 12 is glued to the web areas 16, the embedding is significantly improved compared to the prior art.
  • the uncoated areas 44 are somewhat smaller than the window areas 14 can also be considered. However, the focusing effect of adhesive-coated microlenses 22 in the window areas 14 is reduced or eliminated, so that the uncoated areas 44 are preferably no more than 10%, particularly preferably no more than 5% smaller than the window areas 14.
  • a further advantage of the registered insertion of the microlens thread 12 is that any motif cracks 34 in the motif image can be hidden under a paper web 16 of the security paper 50, as shown in 3 shown. This further increases the uniformity of the visual appearance of the microlens thread 12 .
  • the microlens thread 12 is not introduced into the paper web 50 in registration, but is printed with an adhesive pattern 48 immediately before it enters the paper machine in such a way that the coated areas 46 fit into the recessed sections of the cylinder mold in which the paper webs 16 form, come to rest.
  • a sensor can detect the position of the webs 16 formed in the paper web during sheet formation and the detected position can be used to control the printing positions for the adhesive pattern 48 . In this way, too, the uncoated and coated areas 44, 46 can be aligned with the window and web areas 14, 16 in register.
  • FIG. 5 and 6 a top view or a cross section of the microlens thread 60 before embedding in the security paper and 7 shows a cross section of the security paper 50 with the embedded microlens thread 60.
  • the microlens thread 60 is not coated with adhesive on its upper side 30, but is provided with an opening pattern 68 in the form of the web pattern 18 before it is introduced into the paper web 50.
  • the opening pattern 68 consists of a sequence of areas 66 with openings 62 and areas 64 without openings, which corresponds to the sequence of the land areas 16 and window areas 14 of the land pattern 18 .
  • the underside 32 of the microlens thread 60 is preferably provided with a full-surface adhesive layer 42 .
  • the microlens thread 60 is now introduced into the paper web 50 in a registered manner, so that the areas 66 of the microlens thread 60 provided with openings coincide with the web areas 16 of the paper web 50, as already explained in principle in connection with FIGS Figures 2 to 4 described.
  • the first sensor detects the position of the openings 62 shortly before the introduction of the microlens thread 12 into the paper web.
  • the microlens thread 60 can have its opening pattern 68 are aligned with the window and web areas 14, 16 in register.
  • the provision of the openings 62 ensures that during the formation of paper under the web areas 16, paper fibers or other components of the substrate 50 can penetrate through the openings 62 in order to establish a connection between the web areas 16 and the substrate material 52 under the microlens thread 60 ( 7 ). This also achieves an intimate connection between the paper web 50 and the microlens thread 60 and thus secure embedding without the formation of folds. Since the upper side 30 of the microlens thread 60 remains free of adhesive, the optical properties of the microlenses 22 are not impaired.
  • the openings 62 can, for example, be punched or produced by laser cutting.
  • Each area 66 can contain one or more openings 62 .
  • the microlens thread 60 is not introduced into the paper web 50 in a registered manner, but is only provided with the opening pattern 68 by laser impingement immediately before it enters the paper machine in such a way that the areas 66 with openings 62 in the recessed sections of the cylinder mold, in which the paper webs 16 form, come to rest.
  • a sensor can detect the position of the webs 16 formed in the paper web and the detected position can be used to control the laser beam.
  • the aperture pattern 68 is registered with the window and land areas 14,16.
  • a microlens thread 70 is used which has a sequence of subregions 74 with microlenses 22 and microlens-free subregions 76 on its upper side 30 .
  • the motif layer and any further layers of the microlens thread 70 are in FIGS Figures 8 and 9 not shown for the sake of clarity.
  • the microlens-free partial areas 76 of the upper side 30 are coated with adhesive 40 and the underside of the microlens thread 70 is also coated with adhesive 42 over its entire surface.
  • the adhesive-coated, microlens-free partial areas 76 are smaller than the width of the window areas 14 of the ridge pattern 18 . This ensures that when the microlens thread 70 is introduced unregistered into a security paper 50, microlenses 22 can be seen at least in certain areas in each window area 14 ( 9 ).
  • the areas coated with adhesive can certainly also have microlenses. These would optically ineffective due to the adhesive coating, but allow a uniform design of the thread with microlenses.
  • the microlens-free areas diagonally or in strips along the thread and thus optionally to provide areas over the entire length of the thread that can be coated with adhesive.
  • the adhesive used in the present invention can be, for example, a heat seal lacquer.
  • the adhesive can also have security features, such as dyes or color pigments and luminescent substances.

Claims (3)

  1. Procédé de fabrication d'un papier de sécurité, dans lequel
    M) un fil à microlentilles continu ayant une face supérieure et une face inférieure opposée est mis à disposition, la face supérieure étant, au moins dans des zones partielles, pourvue de microlentilles,
    P) une bande de papier ayant une figuration nervurée prédéterminée est générée, laquelle comporte des zones nervurées dans lesquelles le fil à microlentilles est noyé à l'intérieur de la bande de papier, et qui comporte des zones fenêtres situées entre les zones nervurées et dans lesquelles le fil à microlentilles émerge à la surface de la bande de papier, et
    E) le fil à microlentilles est incorporé dans la bande de papier en étant joint à la bande de papier par sa face inférieure et aussi par sa face supérieure dans les zones nervurées, la bande de papier formant, conjointement avec le fil à microlentilles incorporé, le papier de sécurité, caractérisé en ce que
    le fil à microlentilles comporte un motif ayant un saut de motif, le fil à microlentilles étant incorporé en registre, de telle sorte que le saut de motif se positionne dans une des zones nervurées de la bande de papier, cependant que
    - le fil à microlentilles est, avant son incorporation dans la bande de papier, pourvu sur sa face supérieure d'une couche de colle sous la forme de la figuration nervurée, et
    - le fil à microlentilles est, à l'étape E), incorporé en registre dans la bande de papier, de telle sorte que les zones, du fil à microlentilles, enduites de colle, coïncident avec les zones nervurées de la bande de papier.
  2. Procédé selon la revendication 1, caractérisé en ce que la couche de colle forme une figuration de colle ayant une succession de zones non enduites et de zones enduites de colle, de cependant que les zones enduites de colle ont respectivement une dimension de jusqu'à 50%, de préférence de jusqu'à 10% inférieure à celle des zones nervurées de la bande de papier.
  3. Procédé selon une des revendications 1 ou 2, caractérisé en ce que la bande de papier ayant la figuration nervurée prédéterminée est formée dans une machine à papier et en ce que le fil à microlentilles continu entre dans la machine à papier.
EP12769595.5A 2011-09-06 2012-09-04 Procédé de fabrication d'un papier de sécurité et fil à microlentilles Active EP2753754B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011112554A DE102011112554A1 (de) 2011-09-06 2011-09-06 Verfahren zur Herstellung eines Sicherheitspapiers und Mikrolinsenfaden
PCT/EP2012/003695 WO2013034279A2 (fr) 2011-09-06 2012-09-04 Procédé de fabrication d'un papier de sécurité et fil à microlentilles

Publications (3)

Publication Number Publication Date
EP2753754A2 EP2753754A2 (fr) 2014-07-16
EP2753754B1 EP2753754B1 (fr) 2015-11-18
EP2753754B2 true EP2753754B2 (fr) 2023-05-24

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ID=47002812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12769595.5A Active EP2753754B2 (fr) 2011-09-06 2012-09-04 Procédé de fabrication d'un papier de sécurité et fil à microlentilles

Country Status (4)

Country Link
US (1) US20140238628A1 (fr)
EP (1) EP2753754B2 (fr)
DE (1) DE102011112554A1 (fr)
WO (1) WO2013034279A2 (fr)

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DE102011112554A1 (de) * 2011-09-06 2013-03-07 Giesecke & Devrient Gmbh Verfahren zur Herstellung eines Sicherheitspapiers und Mikrolinsenfaden
DE102011115133A1 (de) * 2011-10-07 2013-04-11 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Herstellen eines blattförmigen Substrates
CN112334320B (zh) * 2018-07-03 2023-01-24 克瑞尼股份有限公司 具有展现出提高的防收割性的附接安全装置的安全证件
CN108909266B (zh) * 2018-07-20 2020-08-21 安徽原上草节能环保科技有限公司 安全元件、制备方法及安全票证
EP3608121A1 (fr) * 2018-08-10 2020-02-12 IAI Industrial systems B.V. Document infalsifiable
DE102022117744A1 (de) 2022-07-15 2024-01-18 Georg Sahm Gmbh & Co. Kg Verfahren zum Fördern eines Fadenstrangs, Verfahren zum Synchronisieren eines Fadenstrangs mit einer Papierbahn, Verfahren zum Synchronisieren eines Fadens mit einer Papierbahn, Vorrichtung zum Durchführen der Verfahren

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US20140238628A1 (en) 2014-08-28
WO2013034279A2 (fr) 2013-03-14
EP2753754A2 (fr) 2014-07-16
DE102011112554A1 (de) 2013-03-07
WO2013034279A3 (fr) 2013-07-18

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