EP3650242B1 - Outil d'estampage pour structures détectables tactilement - Google Patents

Outil d'estampage pour structures détectables tactilement Download PDF

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Publication number
EP3650242B1
EP3650242B1 EP19000470.5A EP19000470A EP3650242B1 EP 3650242 B1 EP3650242 B1 EP 3650242B1 EP 19000470 A EP19000470 A EP 19000470A EP 3650242 B1 EP3650242 B1 EP 3650242B1
Authority
EP
European Patent Office
Prior art keywords
plate
embossing tool
structures
embossing
edge
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
EP19000470.5A
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German (de)
English (en)
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EP3650242A1 (fr
Inventor
Peter Franz
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
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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.)
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Publication of EP3650242A1 publication Critical patent/EP3650242A1/fr
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Publication of EP3650242B1 publication Critical patent/EP3650242B1/fr
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Classifications

    • 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
    • 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
    • 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
    • B44B5/0047—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by rolling

Definitions

  • the invention relates to an embossing tool with which tactilely detectable structures or fine structures are embossed into a substrate, the embossing tool being designed as a plate with a front side and a rear side and with a first edge and a second edge opposite the first edge.
  • Embossing tools for gravure printing or letterpress printing are used to produce these embossed structures.
  • a special application here is the use of structures that can be seen particularly clearly by people with visual impairment.
  • a special embodiment here is the Braille script or identifiers, which are typically defined by points or line structures on the basis of the system or quantity, and represent, for example, a denomination of a banknote.
  • intaglio printing a special form of intaglio printing, a printing plate with recessed structures is used, which transfers raised areas to the substrate to be embossed with high pressure.
  • embossing plates In high pressure, milled, lasered, washed out or etched embossing plates are used, which are created by means of a counter pressure forme by means of mechanical Pressure creates a raised structure on the substrate.
  • the mechanical pressure for embossing is exerted locally directly on the printing plate, this pressure being transmitted to the printing unit and the corresponding bearings of printing and counter-pressure cylinders and possibly other cylinders and placing 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 punctiform embossing structures.
  • a special form is also the embossing with the help of a letterpress plate, which is stretched on a solid cylinder, in conventional gravure printing.
  • a method for producing an embossing tool is known, in particular a high-pressure plate for blind embossing, with structures that can be tactilely detected in a substrate being embossed with the embossing tool.
  • the embossing tool is produced from a gravure plate using a galvanic molding path, with an embossing motif first being introduced into a gravure printing plate and then the embossing tool being produced by galvanic molding of the intaglio printing plate.
  • the embossing motif on the embossing tool consists of one or more elevations on the front of the embossing tool and one or more directly opposite depressions on the back of the embossing tool.
  • an embossing tool which comprises an embossing cylinder which has a surface structure with an overlapping edge.
  • an embossing tool which has a corrugation in a first edge area of the embossing tool on the front side and a corrugation in a second edge area of the embossing tool on the rear side of the embossing tool, which was originally arranged on the front side of the embossing tool.
  • the first and second edge areas are opposite one another on the embossing tool and overlap when the embossing tool is subsequently clamped onto an embossing cylinder, so that the corrugation of the first edge area meshes with the corrugation of the second edge area.
  • the second edge area is bent or kinked backwards by approximately 180 °, so that the corrugation in the second edge area, which was originally arranged on the front of the embossing tool, is arranged on the back of the embossing tool.
  • this bending or kinking of the plate embossing tool requires a further work step and must also be carried out very precisely so that the corrugations of the two edge areas can interlock.
  • 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. Furthermore, an embossing tool is to be created that enables better reception in a clamping system of a clamping cylinder or on a magnetic cylinder.
  • the plate has a first corrugation in an edge region of the first edge on the front of the plate and on the back of the plate and a second corrugation in an edge region of the second edge on the front of the plate and on the back of the plate, the edge area of the first edge and the edge area of the second edge overlap in such a way that the edge area of the first edge is arranged below the edge area of the second edge, so that the structures of the first Corrugation and the Interlocking structures of the second corrugation arranged on the rear side of the plate.
  • the two edge regions of the plate interlock with one another, thereby preventing the embossing plate from slipping or shifting.
  • the corrugation of the plate consists of one or more elevations on the front side of the plate and depressions directly opposite the elevations on the rear side of the plate.
  • the corrugation consists of one or more elevations and corresponding depressions that are directly opposite the elevations.
  • the geometry of the depressions corresponds approximately to the geometry of the elevations, but the dimensions of the depressions, in particular their width and depth, are smaller than the dimensions of the elevations, in particular their width and height.
  • the geometries of both edge areas are particularly preferably matched to one another in such a way that the toothing is optimized in that the smaller elevations engage in the larger depressions.
  • the first and second edge areas are opposite one another on the embossing tool.
  • the two transverse sides are those sides of the rectangular embossing tool, which overlap or approach one another after the circular arc-shaped bending of the embossing tool into a cylindrical shape.
  • an edge area is an area which extends on the front and back of the embossing tool starting from an edge towards the center of the embossing tool.
  • the edge area is designed in the form of a strip with a width (that is the dimension perpendicular to the edge of the embossing tool) of particularly preferably 3 mm to 100 mm.
  • the corrugation in the respective edge area can either begin directly at the edge, so that the edge area is covered with a corrugation starting from the edge, or only start from a certain distance from the edge so that the entire edge area is not covered with a corrugation, but the corrugation is slightly indented.
  • the embossing cylinder is preferably a clamping cylinder on which the embossing tool is mechanically clamped and mechanically held with clamping means, for example one or more screw connections or one or more clamping bars.
  • the embossing cylinder is a magnetic cylinder on which the embossing tool is mechanically clamped and held by means of magnetic forces of attraction.
  • corrugation is an arrangement of raised and correspondingly recessed structures in the plate, which are arranged in a grid-like manner.
  • the corrugation is a single linear elevation and corresponding depression in the first edge area and a single linear elevation and corresponding depression in the second edge area, which are aligned parallel to one another after clamping the embossing tool onto the embossing cylinder.
  • An improvement in the toothing results when two or more linear elevations and corresponding depressions in the respective edge area are arranged, which are aligned parallel to each other after clamping the embossing tool on the embossing cylinder.
  • the linear elements can also be wave-shaped, zigzag-shaped or configured in another shape and also have interruptions.
  • non-linear structures such as pyramids or knobs are also possible. In all of these cases, it is only important that the structures of the two edge areas are aligned parallel to one another or can interlock with one another after the stamping tool has been clamped onto the stamping cylinder.
  • the embossing tool according to the invention results in a more solid reception of the embossing tool on the embossing cylinder, which reduces or prevents slipping or displacement of the embossing tool on the embossing cylinder. Furthermore, the corrugation of the plate enables the embossing tool to be precisely aligned on the embossing cylinder in the form of a "snap-in" of the two corrugations into one another in a predetermined position relative to one another.
  • a further corrugation is arranged on the embossing cylinder, the structures of the first corrugation arranged on the back of the plate interlocking with the corrugation on the embossing cylinder during the subsequent clamping of the embossing tool on the embossing cylinder.
  • the edge areas of the plate interlock with a further corrugation on the embossing cylinder, which additionally prevents the embossing plate from slipping or shifting on the embossing cylinder.
  • the interlocking and / or the register of the two corrugations can advantageously be further supported by having first structures of the respective corrugation parallel or almost parallel to the outer edge of the edge regions of the Plate aligned and a second structures are aligned transversely to the outer edge of the edge regions of the plate, for example at an angle of 90 °, in order to also ensure lateral interlocking and / or lateral registration.
  • first structures of the respective corrugation parallel or almost parallel to the outer edge of the edge regions of the Plate aligned and a second structures are aligned transversely to the outer edge of the edge regions of the plate, for example at an angle of 90 °, in order to also ensure lateral interlocking and / or lateral registration.
  • a zigzag corrugation particularly advantageously enables a combination of a lateral and parallel alignment of the plate in one go.
  • embossing tool Another advantage of the embossing tool according to the invention is that the exact cutting of the final format of the embossing tool is not decisive, but the exact CAD implementation or galvanic molding of the corrugation of the plate. This means that tolerances can be significantly larger when cutting and the repeatability of a production process is increased many times over.
  • machines can be used with the embossing tool according to the invention which are suitable for holding, screwing, riveting, sucking, clamping, magnetically holding the embossing tool or making it adhere to the embossing cylinder with aids.
  • These can be embossing devices, punching machines, folding machines, offset machines, letterpress machines, varnishing machines with offset units or varnishing units, gravure printing machines, intaglio printing machines and digital printing machines or screen printing machines, which basically allow embossing.
  • machines can be used which are flat / flat, round / flat, flat / round, round / round in the embossed design.
  • hole grains can be applied within the corrugated area or in the immediate vicinity to facilitate riveting, screwing or technical loosening and come to rest in the narrowest space of a pressure gap.
  • the corrugation is adapted to the geometry and dimensions of a clamping channel in the clamping cylinder, for example to its height, width or flank angle.
  • the corrugation geometry e.g. height, width, spacing, can be adjusted almost at will.
  • the embossing tool is a high pressure plate.
  • This high pressure plate is particularly preferably molded from a gravure plate by electroplating, as is the case, for example, from the DE 10 2017 005 838 A1 is known, or molded from a gravure plate by means of an embossing process.
  • the width or line thickness of the structures of the corrugation is at least 30 ⁇ m.
  • the height of the corrugation structures arranged on the front side of the plate compared to the surrounding surface of the plate is at least 10 ⁇ m, advantageously 20 ⁇ m to 100 ⁇ m and particularly advantageously 100 ⁇ m to 750 ⁇ m.
  • the plate consists of nickel, copper, brass, spring steel or zinc and has a thickness of approximately 150 ⁇ m to approximately 3000 ⁇ m. Further designs also go well beyond these material thicknesses. Thicknesses of 10 mm, for example, can also be desired here.
  • the length and width of the plate is particularly advantageously about 1000 mm to about 1200 mm each. This varies according to the conditions of the embossing plate holder.
  • the number, geometry and occupancy of the structures of the corrugation vary depending on the requirements of the recording conditions in terms of shape, distribution, size and spacing.
  • the substrate into which the embossing structures are shaped in the embossing process is particularly preferably made of paper made of cotton fibers, such as is used for banknotes or as passport material, or of other natural fibers or of synthetic fibers or a mixture of natural and synthetic fibers, or of at least one plastic film.
  • the substrate preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid.
  • the substrate consists, for example, of a combination of plastic film-paper-plastic film, i.e. a substrate made of paper is covered on each of its two sides by a plastic film, or a combination of paper-plastic film-paper, i.e. a substrate made of a plastic film is covered on each of its covered by paper on both sides.
  • substrates which are particularly suitable for embossing, for example metal foils, thin foils, cardboard, surface-treated cardboard or laminated substrate.
  • the paper layer normally has a weight of 40 g / m 2 to 1000g / m 2, preferably 80 g / m 2 to 450g / m 2. Of course, any other suitable weight and any other suitable strength can be used depending on the application.
  • the thickness of the substrate is preferably 90 ⁇ m or more.
  • Documents of value 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 forgery-prone papers, 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, storage boxes and the like.
  • the simplified designation of value document includes all of the above-mentioned materials, documents and product security elements.
  • register the positional accuracy of embossed structures or other elements with respect to one another on the front and / or back of an embossing tool or a substrate.
  • register the positional accuracy of embossed structures or other elements with respect to one another on the front and / or back of an embossing tool or a substrate.
  • register the positional accuracy of embossed structures or other elements with respect to one another on the front and / or back of an embossing tool or a substrate.
  • register defines register as the accuracy in printing technology with which the intended reproduction quality of the details to be reproduced is achieved or maintained.
  • front or back of an embossing tool or a plate are relative terms which can also be referred to as “the embossing” and “the opposite” side and which form the majority of the total surface of the embossing tool or plate. These terms expressly do not include the side surfaces of an embossing tool or a plate that are negligibly small in comparison to the extent of the embossing tool or the plate and not with it Embossing elements or coatings are or can be provided.
  • the Fig. 1 shows a side view of an embossing tool according to the invention from a plate 1 in a first embodiment with embossed structures 2 on the front side V, which are molded into a substrate after an embossing process.
  • the plate 1 is shown here as a high-pressure plate after the galvanic molding of a corresponding gravure form before the entire stamping tool is bent in the shape of a circular arc and clamped onto an stamping cylinder.
  • corrugation 3 On the front side V, which consists of three parallel hipped roof-like elevations, and on the rear side R there is a corrugation 4, which consists of three parallel depressions.
  • the depressions 4 are here arranged or formed exactly opposite the elevations 3.
  • corrugation 6 on the front side V, which consists of three parallel hipped roof-like elevations, and on the rear side R there is a corrugation 7, which consists of three parallel depressions.
  • the depressions 7 are here arranged or formed exactly opposite the elevations 6.
  • the Fig. 2 shows in side view a similar embossing tool as Fig. 1 .
  • the increases 3 and 6 start here in contrast to Fig. 1 however, not directly at the edges K1 and K2, but are indented at a distance 5 'and 8' from the edges K1 and K2, respectively.
  • the distance 5 'and 8' can assume any value from 0 mm to a few centimeters, the distance of 0 mm being the stamping tool Fig. 1 is equivalent to.
  • Fig. 3 shows the embossing tool 1 from Fig. 1 after it has been bent almost in the shape of a circular arc, shortly before being clamped onto a clamping cylinder.
  • the two edge areas 5 and 8 overlap in such a way that the two corrugations 3 and 7 interlock after clamping and thus prevent the stamping tool from shifting or slipping on the clamping cylinder later.
  • Fig. 4 shows a plan view of the front side of an embossing tool according to the invention from a plate 1 in a third embodiment.
  • the plate 1 is shown here as a high-pressure plate after the galvanic molding of a corresponding gravure form before the entire stamping tool is bent in the shape of a circular arc, but in contrast to FIG Fig. 1 before the edges 10 of the plate are cut along the cut edges marked with the scissors symbol.
  • Corrugations 11 and 12 in the form of linear elevations arranged parallel to one another are arranged on the right and left edges of the embossing tool 1 and are aligned parallel to the outer edge of the respective edge region of the plate 1. After cutting off the edges 10 and bending the plate 1 in the shape of a circular arc, accordingly Fig. 3 interlock the corrugations 11 with the depressions on the back of the plate 1, which lie opposite the corrugations 12, into one another and prevent the embossing tool 1 from being displaced in the x direction.
  • the plate 1 has corrugations 13, 14, 15 and 16, which are aligned at an angle of 90 ° transversely to the corrugations 11 and 12 and the outer edge of the edge region of the plate 1 to also a lateral interlocking and / or a to ensure lateral registration.
  • the corrugations 13, 14, 15 and 16 the y-axis of the plate 1 can thus be brought into position exactly with respect to one another and also secured against displacement.
  • Bores 18 are arranged in the corners of the plate 1 in order to facilitate riveting, screwing or technical loosening of the overlapping edge regions of the embossing tool 1 with one another. Further bores can also be made at further points within the corrugation 11 and 12 or in the outer area.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Credit Cards Or The Like (AREA)

Claims (10)

  1. Outil d'estampage, avec lequel des structures détectables tactilement ou des structures fines sont estampées dans un substrat, l'outil d'estampage étant configuré sous la forme d'une plaque (1) munie d'un côté avant (V) et d'un côté arrière (R), ainsi que munie d'un premier bord (K1) et d'un deuxième bord (K2) opposé au premier bord (K1), caractérisé en ce que la plaque (1) comprend un premier striage (3, 4) dans une zone de bord (5) du premier bord (K1) sur le côté avant (V) de la plaque (1) et sur le côté arrière (R) de la plaque (1) et un deuxième striage (6, 7) dans une zone de bord (8) du deuxième bord (K2) sur le côté avant (V) de la plaque (1) et sur le côté arrière (R) de la plaque (1), la zone de bord (5) du premier bord (K1) et la zone de bord (8) du deuxième bord (K2) se chevauchant lors d'un serrage ultérieur de l'outil d'estampage sur un cylindre d'estampage, de telle sorte que la zone de bord (5) du premier bord (K1) soit agencée en dessous de la zone de bord (8) du deuxième bord (K2), de telle sorte que les structures du premier striage (3) agencées sur le côté avant (V) de la plaque (1) et les structures du deuxième striage (7) agencées sur le côté arrière (R) de la plaque (1) s'imbriquent l'une avec l'autre.
  2. Outil d'estampage selon la revendication 1, caractérisé en ce que le striage de la plaque (1) est constitué par une ou plusieurs élévations sur le côté avant (V) de la plaque (1) et par des creux directement opposés aux élévations sur le côté arrière (R) de la plaque (1).
  3. Outil d'estampage selon la revendication 1 ou 2, caractérisé en ce qu'un striage supplémentaire est agencé sur le cylindre d'estampage; lors du serrage ultérieur de l'outil d'estampage sur le cylindre d'estampage, les structures du premier striage (4) agencées sur le côté arrière (R) de la plaque (1) s'imbriquant avec le striage sur le cylindre d'estampage.
  4. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le cylindre d'estampage est un cylindre de serrage, sur lequel l'outil d'estampage est serré mécaniquement et maintenu mécaniquement avec des moyens de serrage.
  5. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les striages (3, 4, 6, 7) sont constitués par des premières et des deuxièmes structures, les premières structures du striage respectif (3, 4, 6, 7) étant orientées parallèlement ou presque parallèlement au bord extérieur (K1, K2) des zones de bord (5, 8) de la plaque et les deuxièmes structures étant orientées perpendiculairement au bord extérieur (K1, K2) des zones de bord (5, 8) de la plaque.
  6. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que des premières structures du striage respectif sont orientées parallèlement ou presque parallèlement au bord extérieur des zones de bord de la plaque et des deuxièmes structures sont orientées perpendiculairement au bord extérieur des zones de bord de la plaque, afin d'assurer également une imbrication latérale et/ ou un alignement latéral.
  7. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les structures du striage respectif (3, 4, 6, 7) sont orientées en zig-zag par rapport au bord extérieur (K1, K2) des zones de bord de la plaque.
  8. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que l'outil d'estampage est une plaque haute pression, qui est de manière particulièrement préférée formée galvaniquement à partir d'une plaque basse pression.
  9. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les striages (3, 4, 6, 7) sont conçus sous forme linéaire et la largeur ou l'épaisseur de ligne des structures du striage est d'au moins 30 µm.
  10. Outil d'estampage selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la hauteur des structures du premier et du deuxième striage (3, 6) agencées sur le côté avant (V) de la plaque (1) par rapport à la surface environnante de la plaque (1) est d'au moins 10 µm, avantageusement de 20 µm à 100 µm et particulièrement avantageusement de 100 µm à 750 µm.
EP19000470.5A 2018-10-17 2019-10-15 Outil d'estampage pour structures détectables tactilement Active EP3650242B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018008225.4A DE102018008225A1 (de) 2018-10-17 2018-10-17 Prägewerkzeug für taktil erfassbare Strukturen

Publications (2)

Publication Number Publication Date
EP3650242A1 EP3650242A1 (fr) 2020-05-13
EP3650242B1 true EP3650242B1 (fr) 2021-08-18

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EP19000470.5A Active EP3650242B1 (fr) 2018-10-17 2019-10-15 Outil d'estampage pour structures détectables tactilement

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DE (1) DE102018008225A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3083251B1 (fr) * 2013-12-20 2023-06-07 Temicon GmbH Disposititif et procédé de production de surfaces structurées
DE102017005838A1 (de) 2017-06-21 2018-12-27 Giesecke+Devrient Currency Technology Gmbh Verfahren zur Herstellung eines Prägewerkzeugs für taktil erfassbare Strukturen
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

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EP3650242A1 (fr) 2020-05-13

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