EP3738786A1 - Élément de sécurité luminescent - Google Patents

Élément de sécurité luminescent Download PDF

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Publication number
EP3738786A1
EP3738786A1 EP20174625.2A EP20174625A EP3738786A1 EP 3738786 A1 EP3738786 A1 EP 3738786A1 EP 20174625 A EP20174625 A EP 20174625A EP 3738786 A1 EP3738786 A1 EP 3738786A1
Authority
EP
European Patent Office
Prior art keywords
security element
security
luminescent layer
layer
personalized
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
EP20174625.2A
Other languages
German (de)
English (en)
Other versions
EP3738786B1 (fr
Inventor
Ulrich Bielesch
Michael MAUDERER
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei 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 Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP3738786A1 publication Critical patent/EP3738786A1/fr
Application granted granted Critical
Publication of EP3738786B1 publication Critical patent/EP3738786B1/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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • 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
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the present invention relates to a security element for use in a security document and a method for producing a security element for use in a security document.
  • the invention also relates to a security document and a method for producing a security document.
  • a security document is usually composed of several layers, which are preferably connected to one another by lamination or lamination.
  • the data are introduced under a preferably transparent cover layer within the material. This can be done by laser personalization in the otherwise finished data carrier.
  • Another method provides for the data carrier to be provided with a preferably transparent cover layer after the personalization.
  • a value or security document can be alienated by removing the cover layer and, after manipulating the underlying data, a new cover layer is applied.
  • holograms can be used, such as in the documents WO 2017 109 119 A1 , DE 10 2007 042 386 A1 , EP 2 738 624 B1 described.
  • a special hologram film is exposed accordingly and applied to the data carrier.
  • the surface of a security document can be microstructured, which makes a manipulation of the cover layer recognizable.
  • Another possibility is mentioned in the document EP 1 970 211 A1 disclosed.
  • the document is labeled with a laser on the narrow side surfaces in order to create an optical connection between the layers.
  • WO 98/19869 or. DE 697 23 283 T2 a security feature is presented in which information is introduced into several layers of the document by perforating the data carrier.
  • a security element is understood to mean an objective unit which comprises at least one security feature.
  • Security elements serve to secure security documents, which also include documents of value, against forgery or copying.
  • a security feature can be an independent physical unit that can be connected, for example glued or welded, to a security document, which can also be a value document. However, it can also be an integral part of a security document.
  • a security feature is an object that can only be produced or reproduced without authorization with increased effort compared to simple copying or not at all.
  • Security documents typically have a substrate, a printing layer and optionally a transparent cover layer.
  • a substrate is a support structure on which the printing layer with information, images, patterns and the like is applied. All customary materials based on paper and / or plastic come into consideration as materials for a substrate. Examples of security documents are identity cards, passports, driver's licenses, ID cards, access control cards, visas, Tax codes, tickets, vehicle documents, banknotes, checks, postage stamps, credit cards, any chip cards and adhesive labels.
  • luminescence is understood to mean fluorescence and phosphorescence with a Stokes shift and / or an anti-Stokes shift.
  • the luminescence is preferably photoluminescence, but it can also be electroluminescence.
  • the object of the present invention is to further improve the security against forgery of security elements and security documents.
  • the security element according to the invention is designed for use for a security document, for example as a component or as a layer arrangement in the context of a security document. It includes a personalized layer and a luminescent layer.
  • the personalized layer preferably comprises personalized information, for example visible personalized information.
  • the luminescent layer comprises a structure made up of a number of structural elements with dimensions between 0.1 micrometers (0.1 ⁇ m) and 100 micrometers (100 ⁇ m), for example with dimensions between 10 micrometers and 50 micrometers.
  • the structural elements cause a deflection of light rays striking them. Thanks to the use of luminescent material, the structure is easily perceptible as a luminous element.
  • the luminescent layer can preferably have a structure that includes personalized information.
  • the personalized information in the luminescent layer can correspond to or correlate with information in the personalized layer.
  • the structuring preferably takes up the information or data of the underlying data carrier, so that the surface or the cover layer does not manipulated or separated from the rest of the data carrier and replaced without being noticed.
  • the present invention enables a document of value and / or security document to be secured by a security element which, in addition to a personalized layer, has a luminescent layer with a preferably personalized structure. A manipulation or replacement of the personalized layer or damage to the luminescent layer can thus be easily identified.
  • the security element preferably comprises at least one layer which comprises laser-sensitive material, that is to say material suitable for processing by means of a laser, or which consists of laser-sensitive material.
  • the luminescent layer advantageously comprises laser-sensitive material. Laser-sensitive material enables simple and inexpensive production of the structural elements, in particular the production of structural elements with very small dimensions.
  • the structural elements can, for example, have dimensions of less than 100 micrometers (100 ⁇ m), preferably of less than 20 micrometers (20 ⁇ m). The smaller the dimensions, the more difficult it is to counterfeit or manipulate the security element. On the other hand, the structural elements should preferably have larger dimensions than the wavelength of visible light, which is why, for example, structural elements with dimensions larger than 1 micrometer (1 ⁇ m) can be used.
  • the personalized layer has a surface and the luminescent layer is arranged above the personalized layer in relation to a surface normal of the personalized layer.
  • the structural elements are preferably colorless. This makes imitation or manipulation difficult since the structural elements are only visible when luminescence occurs.
  • the luminescent layer can optically be at least partially transparent, in particular completely transparent. This, too, makes counterfeiting more difficult, since it cannot initially be seen that a luminescent layer is present at all.
  • the luminescent layer preferably has a surface, wherein the surface can comprise a top side and a bottom side of the luminescent layer, and at least one structural element is arranged on the surface and / or in the surface and / or in the interior of the luminescent layer.
  • At least one structural element can be designed as a recess, in particular in the form of a micro-bore or micro-engraving, or elevation or cavity.
  • the structural elements can be arranged both on the upper side and on the lower side of the luminescent layer or in the interior of the layer. The design variants mentioned further improve protection against forgery.
  • the luminescent layer preferably forms a cover layer, for example a transparent cover layer, of the security element.
  • a cover layer for example a transparent cover layer
  • the security element comprises at least one window area and the security element and the structural elements of the luminescent layer are located in the at least one window area of the security document.
  • the structural elements are visible from both sides of the document. The structural elements appear light when viewed in reflection against a dark background and dark when viewed in transmission against a light background.
  • the security element can be designed, for example, for a specific security document or for a specific type of security document with specific security information.
  • the structure of the luminescent layer can contain security information and / or personalized data for the specific security document.
  • the structure of the luminescent layer can include information that is also contained in the personalized layer, for example.
  • the security information and / or personalized data can be information that can be assigned to the owner of the security document.
  • the luminescent layer can be designed as a film. This enables simple and inexpensive manufacture, as well as easy processing in connection with the introduction of the structural elements into the luminescent layer.
  • the luminescent layer can comprise polycarbonate and / or glass, in particular luminescent glass.
  • the luminescent layer can comprise fluorescent and / or phosphorescent and / or laser-sensitive material.
  • the use of laser-sensitive material enables processing by means of a laser and, in particular, introduction of the structure by means of a laser.
  • the luminescent layer preferably has a refractive index that is higher than 1.1, for example a refractive index between 1.2 and 2. This has the effect that predominantly total reflection occurs at the interface of the luminescent layer and light is only scattered at the structural elements that it can leave the luminescent layer and the structure becomes visible.
  • the security document according to the invention is composed of a number of layers, preferably of two or more layers. It comprises a security element according to the invention as described above.
  • the security document according to the invention has the features and advantages mentioned above in connection with the security element according to the invention.
  • it can comprise laminated layers.
  • the security document can be, for example, an identity card, a passport, a driver's license, a company ID or another security document.
  • structural elements in particular structural elements with dimensions in the micrometer range, are produced in the luminescent layer by means of laser radiation and at least one personalized layer is firmly connected to the luminescent layer.
  • the production of the structural elements in the luminescent layer can take place before or after the connection of the luminescent layer to the personalized layer.
  • the structural elements can be generated by means of ultra-short laser pulses, for example with a pulse duration of less than 10 picoseconds (10 ps), in particular less than 1 picosecond (1 ps) or less than 500 femtoseconds (500 fs).
  • ultra-short laser pulses enables precise production and efficient generation of the structural elements.
  • ultrashort laser pulses minimize or avoid thermal or mechanical damage to the structural elements during processing. With a suitable choice of machining parameters, it is a Almost melt-free machining possible with high precision.
  • the material removal does not cause any color change in the material and the elements of the structure are colorless and preferably consist of micro-bores or micro-engravings.
  • the luminescent film shows a light emission that is easily visible to the naked eye or under a microscope. Therefore, the structure is easily perceptible when viewed as a luminous element.
  • the luminescent layer or a plurality of layers already connected to one another can be moved relative to a focused laser beam and / or scanned by a focused laser beam.
  • the movement of the layer or layers relative to a focused laser beam is preferably carried out in an x-y plane parallel to the surface of the layers to be processed. Scanning can be done using a movable mirror.
  • At least one security element according to the invention or a security element produced according to the invention is connected to a number of further layers.
  • a directly recognizable relationship can preferably be established between the structure introduced in the cover layer and the information in the layer of the data carrier below. A manipulation of the surface or an exchange of the cover layer is thereby directly recognizable.
  • the Figure 1 shows, by way of example and not to scale, a cross section of a luminescent layer 100, for example a cover layer, for a security element, the possible ray paths of the incident light being shown therein.
  • the luminescent layer 100 has a surface.
  • the surface of the upper side of the luminescent layer 100 is marked with the reference number 200 and the surface of the lower side of the luminescent layer 100 is marked with the reference number 201.
  • the incident rays 1 of the ambient light can transmit through the transparent base material or they are absorbed by a fluorescent or luminescent molecule 101 within the base material 100.
  • the light beam broken at the top 200 is identified by the reference number 2.
  • the associated optical axis is identified by the reference number 11.
  • the molecule 101 excited by the light absorption then emits light 4 which is characteristic of the molecule and which as a rule has a Stokes shift. If the light rays 4 emitted in this way hit an interface 200 with different refractive indices n 1 and n 2 , the refractive index of the material n 2 being greater than the refractive index n 1 of the surroundings, the rays 3 leave at a steep incidence, i.e. a small angle to the optical axis 12, the layer 100.
  • the Figures 2 and 3 show the cross section of a luminescent layer 100 which has been modified by laser material processing.
  • the bores 210, 212 and engravings 210, 212 or raised elevations 211 made by means of laser radiation change the interface 200 of the material 100 Figure 2
  • material changes 210, 211 have been made on the upper side 200.
  • material changes 212, 102 have been made on the underside 201 and inside the layer 100.
  • the ones in the Figures 2 and 3 The variants shown can also be combined with one another.
  • the structural elements 102, 210, 211, 212 have dimensions between 0.1 micrometers (0.1 ⁇ m) and 100 micrometers (100 ⁇ m).
  • the Figure 4 shows, by way of example, the cross section of a luminescent layer 100 which has been modified by laser material processing.
  • the beam path with transmitting illumination is shown as an example.
  • This approach is possible when the security element is designed in the form of a window in the security document.
  • the bores 210 introduced by means of laser radiation change the interface 200 of the material 100.
  • transmitted light 1 is deflected in the directions 3 in such a way that the structural elements 210 appear darker than the unprocessed surfaces.
  • the interface 200 shown can be an upper side or an underside of the luminescent layer 100.
  • the Figure 5 schematically shows a detail of a security element 30 according to the invention in a sectional view.
  • the security element 30 comprises a personalized layer 300 with a surface 302 which has a surface normal 301.
  • a previously described luminescent cover layer 100 is arranged above or on the personalized layer 300 with respect to the surface normal 301.
  • the security element 30 according to the invention can be connected to further layers in the context of a security document, for example by lamination.

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  • Credit Cards Or The Like (AREA)
EP20174625.2A 2019-05-16 2020-05-14 Élément de sécurité luminescent Active EP3738786B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019113005.0A DE102019113005A1 (de) 2019-05-16 2019-05-16 Lumineszierendes Sicherheitselement

Publications (2)

Publication Number Publication Date
EP3738786A1 true EP3738786A1 (fr) 2020-11-18
EP3738786B1 EP3738786B1 (fr) 2024-07-10

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ID=70736687

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Application Number Title Priority Date Filing Date
EP20174625.2A Active EP3738786B1 (fr) 2019-05-16 2020-05-14 Élément de sécurité luminescent

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EP (1) EP3738786B1 (fr)
DE (1) DE102019113005A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021002213A1 (de) 2021-04-27 2022-10-27 Giesecke+Devrient Mobile Security Gmbh Sicherheitsmerkmal für ein Wertdokument, Wertdokument, Verfahren zur Herstellung eines Sicherheitsmerkmals und Verfahren zur Prüfung eines Sicherheitsmerkmals
DE102023108753B3 (de) 2023-04-05 2024-08-01 Bundesdruckerei Gmbh Verfahren zum Prüfen eines Sicherheitsdokuments

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998019869A1 (fr) 1996-11-05 1998-05-14 Industrial Automation Integrators (Iai) B.V. Dispositif de securite comportant un motif perfore
WO2003032242A1 (fr) * 2001-10-08 2003-04-17 Giesecke & Devrient Gmbh Codage imprime lisible par une machine, document dote d'un tel codage et procede pour realiser ce codage et ce document
GB2382546A (en) * 2001-10-10 2003-06-04 Rue De Int Ltd Security device incorporating light collecting dye
EP1970211A1 (fr) 2007-03-12 2008-09-17 Gemalto Oy Document d'identification sécurisée et son procédé de fabrication
DE102007024298B3 (de) * 2007-05-23 2008-10-16 Zahedi Fariborz Martin Loessl Folienelement zur Echtheitserkennung, Sicherheitspapier, Sicherheitsdokument, Wertdokument, Münze, Jeton, Gebrauchsgegenstand, Gestaltungselement sowie Verfahren zur Herstellung eines Folienelements zur Echtheitserkennung und Verfahren zur Herstellung eines Sicherheitspapiers, eines Sicherheitsdokuments und eines Wertdokuments wie einer Banknote
DE102007042386A1 (de) 2007-09-04 2009-03-05 Bundesdruckerei Gmbh Verfahren und Vorrichtung zur individuellen farbigen holografischen Belichtung
EP2308687A1 (fr) * 2009-10-08 2011-04-13 Mühlbauer AG Document d'identification doté d'une sécurité améliorée contre la manipulation ; procédé de fabrication d'un document d'identification ayant une reconnaissance facilitée de manipulation sur le document d'identification
WO2012041851A1 (fr) * 2010-09-29 2012-04-05 Basf Se Élément de sécurité
WO2012046212A1 (fr) * 2010-10-08 2012-04-12 Arjowiggins Security Structure multicouche
DE102012218053A1 (de) 2012-10-02 2014-01-30 Bundesdruckerei Gmbh Sicherheitsmerkmal, das Sicherheitsmerkmal enthaltendes Wert- und/oder Sicherheitsprodukt sowie Verfahren zur Herstellung des Wert- und/oder Sicherheitsprodukts
DE102013203303B3 (de) * 2012-12-20 2014-06-05 Bundesdruckerei Gmbh Sicherheitsmerkmal für ein Wert- und/oder Sicherheitsprodukt, das Sicherheitsmerkmal aufweisendes Wert- und/oder Sicherheitsprodukt und Verfahren zum Herstellen des Sicherheitsmerkmals
US20140339298A1 (en) * 2013-05-16 2014-11-20 Sicpa Holding Sa Security laminate
EP2738624B1 (fr) 2007-10-31 2017-04-05 Bundesdruckerei GmbH Hologramme et document de sécurité avec échantillons de couleurs de différentes couleurs spectrales
WO2017109119A1 (fr) 2015-12-22 2017-06-29 Bundesdruckerei Gmbh Procédé d'intégration d'un hologramme dans un corps de document de sécurité et corps de document de sécurité

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013200895B4 (de) * 2013-01-21 2017-05-11 Bundesdruckerei Gmbh Wert- oder Sicherheitsprodukt sowie Verfahren zur Herstellung eines Sicherheitsmerkmals auf oder in dem Wert- oder Sicherheitsprodukt
DE102017102556A1 (de) * 2017-02-09 2018-08-09 Kurz Digital Solutions Gmbh & Co. Kg Verfahren zur Verifizierung eines Sicherheitsdokuments sowie ein Sicherheitsdokument, eine Vorrichtung und ein Sicherheitselement

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998019869A1 (fr) 1996-11-05 1998-05-14 Industrial Automation Integrators (Iai) B.V. Dispositif de securite comportant un motif perfore
DE69723283T2 (de) 1996-11-05 2004-05-27 Industrial Automation Integrators (Iai) B.V. Ein lochmuster enthaltendes sicherheitsmerkmal
WO2003032242A1 (fr) * 2001-10-08 2003-04-17 Giesecke & Devrient Gmbh Codage imprime lisible par une machine, document dote d'un tel codage et procede pour realiser ce codage et ce document
GB2382546A (en) * 2001-10-10 2003-06-04 Rue De Int Ltd Security device incorporating light collecting dye
EP1970211A1 (fr) 2007-03-12 2008-09-17 Gemalto Oy Document d'identification sécurisée et son procédé de fabrication
DE102007024298B3 (de) * 2007-05-23 2008-10-16 Zahedi Fariborz Martin Loessl Folienelement zur Echtheitserkennung, Sicherheitspapier, Sicherheitsdokument, Wertdokument, Münze, Jeton, Gebrauchsgegenstand, Gestaltungselement sowie Verfahren zur Herstellung eines Folienelements zur Echtheitserkennung und Verfahren zur Herstellung eines Sicherheitspapiers, eines Sicherheitsdokuments und eines Wertdokuments wie einer Banknote
DE102007042386A1 (de) 2007-09-04 2009-03-05 Bundesdruckerei Gmbh Verfahren und Vorrichtung zur individuellen farbigen holografischen Belichtung
EP2738624B1 (fr) 2007-10-31 2017-04-05 Bundesdruckerei GmbH Hologramme et document de sécurité avec échantillons de couleurs de différentes couleurs spectrales
EP2308687A1 (fr) * 2009-10-08 2011-04-13 Mühlbauer AG Document d'identification doté d'une sécurité améliorée contre la manipulation ; procédé de fabrication d'un document d'identification ayant une reconnaissance facilitée de manipulation sur le document d'identification
WO2012041851A1 (fr) * 2010-09-29 2012-04-05 Basf Se Élément de sécurité
WO2012046212A1 (fr) * 2010-10-08 2012-04-12 Arjowiggins Security Structure multicouche
DE102012218053A1 (de) 2012-10-02 2014-01-30 Bundesdruckerei Gmbh Sicherheitsmerkmal, das Sicherheitsmerkmal enthaltendes Wert- und/oder Sicherheitsprodukt sowie Verfahren zur Herstellung des Wert- und/oder Sicherheitsprodukts
DE102013203303B3 (de) * 2012-12-20 2014-06-05 Bundesdruckerei Gmbh Sicherheitsmerkmal für ein Wert- und/oder Sicherheitsprodukt, das Sicherheitsmerkmal aufweisendes Wert- und/oder Sicherheitsprodukt und Verfahren zum Herstellen des Sicherheitsmerkmals
US20140339298A1 (en) * 2013-05-16 2014-11-20 Sicpa Holding Sa Security laminate
WO2017109119A1 (fr) 2015-12-22 2017-06-29 Bundesdruckerei Gmbh Procédé d'intégration d'un hologramme dans un corps de document de sécurité et corps de document de sécurité

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Publication number Publication date
EP3738786B1 (fr) 2024-07-10
DE102019113005A1 (de) 2020-11-19

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