EP3418066B1 - Procédé de fabrication d'un outil d'estampage pour structures détectables de manière tactile - Google Patents

Procédé de fabrication d'un outil d'estampage pour structures détectables de manière tactile Download PDF

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Publication number
EP3418066B1
EP3418066B1 EP18000539.9A EP18000539A EP3418066B1 EP 3418066 B1 EP3418066 B1 EP 3418066B1 EP 18000539 A EP18000539 A EP 18000539A EP 3418066 B1 EP3418066 B1 EP 3418066B1
Authority
EP
European Patent Office
Prior art keywords
embossing tool
embossing
printing plate
structures
embossed
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
EP18000539.9A
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German (de)
English (en)
Other versions
EP3418066A1 (fr
Inventor
Christian Schulze
Peter Franz
Hans-Joachim Kliem
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
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Publication date
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Publication of EP3418066A1 publication Critical patent/EP3418066A1/fr
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/324Reliefs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29Securities; Bank notes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/405Marking
    • B42D25/425Marking by deformation, e.g. embossing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B44DECORATIVE ARTS
    • B44BMACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02Dies; Accessories
    • B44B5/026Dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B44DECORATIVE ARTS
    • B44CPRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22Removing surface-material, e.g. by engraving, by etching

Definitions

  • the invention relates to a method for producing an embossing tool, in particular a high-pressure plate for blind embossing, structures which can be tactilely detected being embossed into a substrate using the embossing tool.
  • Embossing forms are used for rotogravure or letterpress printing.
  • a special application is the use of structures that can be clearly recognized by people with visual impairments.
  • a special design is the Braille or markings, which are defined by points or line structures typical of the country based on the system or quantity, and represent, for example, a denomination of a banknote.
  • intaglio printing a special form of gravure printing, a printing plate with recessed structures is used, which transfers raised areas to the substrate to be embossed with high pressure.
  • An embossing tool for producing a security element for a valuable object from a substrate, in particular a bank note, a label or an outer packaging, is known, with an engraving for producing a tactile in the surface of the embossing tool detectable structure is introduced.
  • the tactilely detectable structure here consists of a first stamping structure and a second stamping structure, the second stamping structure being arranged within the first stamping structure.
  • the first stamping structure forms a base for the second stamping structure on which the second stamping structure is arranged.
  • the overall result is an embossed structure which consists of a base which is formed by the first embossed structure, the base surrounding the second embossed structure, which in turn is arranged on the base.
  • embossing plates At high pressure, milled, lasered, washed or etched embossing plates are used, which create a raised structure on the substrate by means of a counter-pressure form using mechanical pressure.
  • the mechanical pressure for embossing is exerted directly locally on the printing plate, this pressure being transmitted to the printing unit and the corresponding bearings of printing and counter-pressure cylinders and, if appropriate, further cylinders, and this places a heavy load on them. This has an unfavorable effect on the service life and maintenance frequency of a printing and / or embossing machine, particularly in the case of selective embossing structures.
  • the invention is therefore based on the object of developing a generic embossing tool in such a way that the disadvantages of the prior art are eliminated.
  • the selective application of pressure should be transferred to a larger area in order to manage with a lower mechanical pressure load for the various cylinders of a printing press or their bearings.
  • the embossing tool is produced using the method defined in claim 1.
  • the recess on the back of the embossing tool particularly advantageously distributes the selective pressure distribution, which acts on the elevation on the front of the embossing tool, over a larger area on the back of the embossing tool and thus relieves other components arranged on the back of the embossing tool, onto which the embossing tool relies is spanned.
  • the embossing tool is a high-pressure plate for blind embossing, in which the surface of the printing plate is not provided with color.
  • the elevations of the high-pressure plate are transferred into the substrate to be embossed, without transferring color to the substrate.
  • the embossing tool consists of a metal, in particular nickel, copper or zinc, which is deposited on the intaglio printing plate by means of a galvanic deposition process and thus forms the structures of the intaglio printing plate in an inverted manner.
  • the stamping tool in particular that made of nickel, copper or zinc, has a thickness of approximately 200 ⁇ m to about 750 ⁇ m. Other configurations also go well beyond these material thicknesses. Thicknesses of, for example, 10 mm may also be desired.
  • the length and width of the embossing tool is particularly advantageously about 900 mm to about 1100 mm.
  • the depressions of individual elements on the back of the embossing tool have a depth of up to 0.5 mm, preferably about 0.1 mm, a diameter or a width of up to 1.6 mm, preferably 0.1 mm to 0.2 mm, and a distance from one another (edge to edge) of up to 4 cm, preferably 0.1 mm to 0.5 mm.
  • the embossing tool is preferably clamped onto a steel cylinder as a carrier cylinder, a PVC film with a thickness of approximately 0.5 mm preferably being inserted between the embossing tool and the steel cylinder.
  • machines can be used with this embossing tool that are suitable for holding, screwing, riveting, suctioning, clamping, holding magnetically or using tools to adhere to the steel cylinder.
  • These can be embossing devices, punching machines, folding machines, offset machines, high-pressure machines, coating machines with offset plants or coating units, as well as digital printing machines or screen printing machines, which basically enable embossing.
  • machines can be used which are designed flat / flat, round / flat or flat / round in the embossed version.
  • the geometries of the embossed structures ie in particular the depth, width and length as well as the flank angle, the distance from one another and the distribution of the individual embossed structures on the embossing tool, adapted to the conditions of the embossing design and the substrate to be embossed, as is the case, for example, with the DE 102015009983 A1 is known.
  • the intaglio printing plate is made of brass or plastic and the milling structures or recesses are produced in the brass or plastic plate using a mechanical milling head, a stylus or a laser.
  • gravure printing plates can also be used which otherwise allow recesses, for example by washing out, etching.
  • the embossing structures can be created, which can be matched in particular to the substrate to be embossed.
  • the high pressure mold can also be used in machines that are not actually intended for an embossing process.
  • the embossed structures can also be implemented in a particularly fine manner and inexpensive long runs can be produced with the same printed image.
  • the stamping tools are particularly durable for long runs.
  • due to the galvanic molding process the cheap duplication of the embossing tools is given with very high repeatability.
  • the substrate into which the embossed structures are molded in the embossing process is particularly preferably made of paper made from cotton fibers, such as is used for banknotes or as a fitting material, or from other natural fibers or from synthetic fibers or a mixture of natural and synthetic fibers, or from at least one plastic film.
  • the substrate preferably consists of a combination of at least two different substrates arranged above one another and connected to one another, a so-called hybrid.
  • the substrate consists, for example, of a combination of plastic film-paper-plastic film, that is, a substrate made of paper is covered on both sides by a plastic film, or of a combination of paper-plastic film-paper, that is, a substrate made of plastic film is on each of its both sides covered by paper.
  • substrates which are particularly suitable for embossing, for example metal foils, thin foils, cardboard, surface-treated cardboard, laminated substrate.
  • the paper layer usually has a weight of 40 g / m 2 to 110 g / m 2 , preferably from 80 g / m 2 to 90 g / m 2 . Of course, depending on the application, any other suitable weight and strength can be used.
  • the thickness of the substrate is preferably about 90 ⁇ m or more.
  • Valuable documents for which such a substrate or security paper can be used are, in particular, banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers that are at risk of forgery, such as passports and other identification documents, as well as cards such as credit cards. or debit cards, the card body of which has at least one layer of security paper, and also product security elements, such as labels, seals, blisters, packaging, folding boxes, package inserts and the like.
  • the simplified naming Value document includes all of the above materials, documents and product assurance elements.
  • front side or back side of an embossing tool are relative terms which can also be referred to as “the embossing” and “the opposite” side and which form the major part of the total surface of the embossing tool.
  • the terms of the side surfaces of an embossing tool are expressly not included in these terms, which are negligibly small compared to the extent of the embossing tool and cannot or cannot be provided with embossing elements or coatings.
  • the Fig. 1 shows a side view of a gravure embossing plate 1 known from the prior art with a recess 3 (left figure) and a high pressure embossing plate 2 known from the prior art with an elevation 4 (right figure).
  • a milled, lasered, washed or etched embossing plate 2 is used, which transfers the raised structure 4 to a substrate (not shown) by means of a counter pressure cylinder (not shown) by means of mechanical pressure, which is located between the high pressure embossing plate 2 and the counter pressure cylinder.
  • the mechanical pressure is directly exerted locally on the printing plate 2, this mechanical pressure being transferred to the printing unit and the corresponding bearings by cylinders. This has an unfavorable effect on the printing press, particularly in the case of selective embossing structures.
  • Fig. 2 shows the side view of the solution according to the invention.
  • a hemispherical depression 7 is milled into a brass plate 5 by means of an appropriate milling geometry (left figure).
  • the subsequent electroplating in the desired plate thickness results in an embossing tool in the form of a high-pressure plate 6 with a corresponding elevation 8 on the front of the plate and a recess 9 on the opposite rear (right illustration).
  • Preferred implementations of the elevation 8 relate to blind signs with a diameter of the elevation 8 in the direction of the plate surface between 1 mm and 2.5 mm.
  • elevations 8 are in particular also introduced into the high-pressure plate 6.
  • the embossed structures in the high-pressure plate 6 are particularly preferably designed to be elongated, such as those from the DE 102015009983 A1 are known.
  • Fig. 3 shows in side view the particular advantage of the invention, according to which the mechanical pressure on the high pressure plate 6 during the printing process (symbolized by the thick arrow) does not take place linearly downwards against the steel cylinder on which the high pressure plate 6 is clamped, but on the Distributed edge of the recess 9 also. This is symbolized by the four smaller arrows on the underside of the high-pressure plate 6. This results in a larger area over which the force is distributed and thus a lower mechanical pressure on the steel cylinder and the impression cylinder and their bearing.
  • the distribution of the mechanical pressure during the embossing process is distributed with small dimensions of the recess 9 (0.1 mm height, 0.1 mm up to 0.2 mm diameter or width and 0.1 to 0.5 mm distance from edge to edge) from the center of the recess 9 to the edge of the recess 9. With larger dimensions (0.5 mm height, 1.6 mm diameter or width and 1 cm distance from edge to edge) this will particularly affect the edge of the outer depressions.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)

Claims (9)

  1. Procédé de fabrication d'un outil d'estampage, dans lequel des structures reconnaissables au toucher peuvent être estampées dans un substrat avec l'outil d'estampage, dans lequel l'outil d'estampage est obtenu à partir d'une plaque d'impression en creux (5) par le biais d'un moulage par voie galvanique, dans lequel un motif d'estampage est d'abord introduit dans une plaque d'impression en creux (5) et ensuite l'outil d'estampage (6) est obtenu par moulage galvanique de la plaque d'impression en creux (5), dans lequel le motif d'estampage sur l'outil d'estampage (6) est constitué d'une ou plusieurs élévations (8) sur la face avant de l'outil d'estampage (6) et d'une ou plusieurs dépressions (9) directement opposées sur la face arrière de l'outil d'estampage (6).
  2. Procédé selon la revendication 1, caractérisé en ce que l'outil d'estampage est une plaque haute pression.
  3. Procédé selon au moins des revendications précédentes, caractérisé en ce que l'outil d'estampage est constitué de nickel, de cuivre ou de zinc.
  4. Procédé selon au moins des revendications précédentes, caractérisé en ce que l'outil d'estampage possède une épaisseur d'environ 200 µm à environ 750 µm.
  5. Procédé selon au moins des revendications précédentes, caractérisé en ce que les dépressions sur la face arrière de l'outil d'estampage possèdent une hauteur allant jusqu'à 0,5 mm, de préférence d'environ 0,1 mm, un diamètre ou une largeur allant jusqu'à 1,6 mm, de préférence de 0,1 mm à 0,2 mm, et un écart l'une par rapport à l'autre (bord à bord) allant jusqu'à 4 cm, de préférence de 0,1 mm à 0,5 mm.
  6. Procédé selon au moins des revendications précédentes, caractérisé en ce que l'outil d'estampage est tendu sur un cylindre d'acier en tant que cylindre de support, dans lequel un film de PVC avec une épaisseur d'environ 0,5 mm est de préférence introduit entre l'outil d'estampage et le cylindre d'acier.
  7. Procédé selon au moins des revendications précédentes, caractérisé en ce que les géométries des structures d'estampage, à savoir en particulier la profondeur, la largeur et la longueur ainsi que l'angle du flanc, l'écart entre celles-ci et la distribution des structures d'estampage individuelles sur l'outil d'estampage, sont adaptées aux conditions de la mise en œuvre de l'estampage et à un substrat à estamper.
  8. Procédé selon au moins des revendications précédentes, caractérisé en ce que la plaque d'impression en creux est constituée de laiton ou de plastique, dans lequel l'obtention des structures de fraisage dans la plaque de laiton ou de plastique s'effectue avec une tête de fraisage mécanique, un burin ou un laser.
  9. Procédé selon au moins des revendications précédentes, caractérisé en ce que la plaque d'impression en creux est gravée ou lixiviée.
EP18000539.9A 2017-06-21 2018-06-19 Procédé de fabrication d'un outil d'estampage pour structures détectables de manière tactile Active EP3418066B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017005838.5A DE102017005838A1 (de) 2017-06-21 2017-06-21 Verfahren zur Herstellung eines Prägewerkzeugs für taktil erfassbare Strukturen

Publications (2)

Publication Number Publication Date
EP3418066A1 EP3418066A1 (fr) 2018-12-26
EP3418066B1 true EP3418066B1 (fr) 2020-03-25

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EP18000539.9A Active EP3418066B1 (fr) 2017-06-21 2018-06-19 Procédé de fabrication d'un outil d'estampage pour structures détectables de manière tactile

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EP (1) EP3418066B1 (fr)
DE (1) DE102017005838A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017007525A1 (de) 2017-08-10 2019-02-14 Giesecke+Devrient Currency Technology Gmbh Prägewerkzeug für taktil erfassbare Strukturen
DE102018000694A1 (de) 2018-01-29 2019-08-01 Giesecke+Devrient Currency Technology Gmbh Vorrichtung zum Befestigen eines Prägewerkzeugs auf einer Prägewalze
DE102018000696A1 (de) 2018-01-29 2019-08-01 Giesecke+Devrient Currency Technology Gmbh Verfahren zum Befestigen eines Prägewerkzeugs auf einer Prägewalze
DE102018000686A1 (de) 2018-01-29 2019-08-01 Giesecke+Devrient Currency Technology Gmbh Prägeplatte zur Erzeugung von geprägten Strukturen in einem Wertgegenstand und Verfahren zur Erzeugung einer Prägeplatte
DE102018008225A1 (de) 2018-10-17 2020-04-23 Giesecke+Devrient Currency Technology Gmbh Prägewerkzeug für taktil erfassbare Strukturen
DE102018010010A1 (de) * 2018-12-28 2020-07-02 Hueck Rheinische Gmbh Pressblech
WO2021249609A1 (fr) * 2020-06-09 2021-12-16 Giesecke+Devrient Currency Technology Gmbh Structure en relief rétroréfléchissante dans un revêtement de gaufrage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004050984B3 (de) * 2004-10-20 2006-07-06 Hueck Folien Gmbh & Co. Kg Verfahren zur Herstellung einer endlosen Nickelmatrize zum Prägen von strukturierten Oberflächen
DE102007062123A1 (de) * 2007-12-21 2009-06-25 Giesecke & Devrient Gmbh Werkzeugform zum Erzeugen einer Mikrostruktur
DE202013012131U1 (de) * 2012-04-17 2015-06-26 Boegli-Gravures S.A. Prägewalzensatz für eine Vorrichtung zum Prägen von Verpackungsfolien
DE102015009983A1 (de) 2015-07-31 2017-02-02 Giesecke & Devrient Gmbh Taktile Strukturen auf Wertgegenständen

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
EP3418066A1 (fr) 2018-12-26
DE102017005838A1 (de) 2018-12-27

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