EP3650242A1 - Outil d'estampage pour structures détectables tactilement - Google Patents

Outil d'estampage pour structures détectables tactilement Download PDF

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Publication number
EP3650242A1
EP3650242A1 EP19000470.5A EP19000470A EP3650242A1 EP 3650242 A1 EP3650242 A1 EP 3650242A1 EP 19000470 A EP19000470 A EP 19000470A EP 3650242 A1 EP3650242 A1 EP 3650242A1
Authority
EP
European Patent Office
Prior art keywords
plate
edge
embossing
embossing tool
corrugation
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
EP19000470.5A
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German (de)
English (en)
Other versions
EP3650242B1 (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
Original Assignee
Giesecke and Devrient Currency Technology GmbH
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Publication date
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Publication of EP3650242A1 publication Critical patent/EP3650242A1/fr
Application granted granted Critical
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 structures or fine structures which can be tactilely detected are embossed into a substrate, the embossing tool being designed as a plate with a front side and a back side and with a first edge and a second edge opposite the first edge.
  • embossing tools for gravure printing or high pressure are used.
  • a special application is the use of structures that can be clearly recognized by people with visual impairments.
  • a special embodiment 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.
  • embossing plates are used, which are created by means of a counter pressure form using mechanical Print creates a raised structure on the substrate.
  • 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 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.
  • Another special form is the embossing with the help of a high-pressure plate, which is clamped onto a solid full cylinder, in conventional gravure printing.
  • a method for producing an embossing tool is known, in particular a high-pressure plate for blind embossing, structures which can be tactile detected are embossed into a substrate using the embossing tool.
  • the embossing tool is generated from a gravure printing plate via a galvanic impression path, wherein an embossing motif is first introduced into an intaglio printing plate and then the embossing tool is produced by galvanic molding of the gravure 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 recesses on the back of the embossing tool.
  • Out DE 10 2017 007 525 A1 is also known an embossing tool which has a corrugation in a first edge area of the embossing tool on the front and a corrugation in a second edge area of the embossing tool on the back of the embossing tool, which was originally arranged on the front of the embossing tool.
  • the first and the second edge area lie opposite each other on the embossing tool overlap during a subsequent clamping of the embossing tool on an embossing cylinder, so that the corrugation of the first edge area interlocks with the corrugation of the second edge area.
  • the second edge area is bent or kinked rearward 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 Plattes 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 which enables a 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 side of the plate and on the rear side of the plate and a second corrugation in an edge region of the second edge on the front side of the plate and on the rear side of the plate
  • the edge region of the first edge and the edge region of the second edge overlap such that the edge region of the first edge is arranged below the edge region of the second edge, so that the structures of the first arranged on the front of the plate Corrugation and the Interlock structures of the second corrugation arranged on the back of the plate.
  • the two edge regions of the plate interlock, thereby preventing the stamping plate from slipping or shifting.
  • the corrugation of the plate particularly preferably consists of one or more ridges on the front of the plate and of the ridges directly opposite the ridges on the rear of the plate.
  • the corrugation consists of one or more elevations and corresponding depressions, which 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 less than the dimensions of the elevations, in particular their width and height.
  • the geometries of both edge regions are particularly preferably matched to one another in such a way that the toothing is optimized by the smaller elevations engaging in the larger depressions.
  • the first and the second edge area lie opposite one another on the embossing tool.
  • the two transverse sides are the sides of the rectangular embossing tool, which overlap or approach each other after the stamping tool has been bent in a circular arc into a cylindrical shape.
  • an edge area is an area that extends on the front and back of the embossing tool from an edge to the center of the embossing tool.
  • the edge area is designed in a strip shape with a width (in this case 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 start directly at the edge, so that starting from the edge, the edge area is covered with corrugation, or only start from a certain distance from the edge, so that not the entire edge area is covered with corrugation, but the corrugation is slightly indented.
  • the embossing cylinder is preferably a clamping cylinder on which the embossing tool is mechanically clamped and held mechanically with clamping means, for example one or more screw connections or one or more clamping strips.
  • the embossing cylinder is a magnetic cylinder, onto which the embossing tool is mechanically clamped and held by magnetic attraction forces.
  • 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 increase and corresponding depression in the first edge area and a single linear increase and corresponding depression in the second edge area, which are aligned parallel to one another after the embossing tool has been clamped onto the embossing cylinder.
  • the toothing is improved if two or more linear elevations and corresponding depressions in the respective edge region 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 in another shape and also have interruptions.
  • non-linear structures are also possible, such as pyramids or knobs. It is only important in all of these cases that the structures of the two edge regions are each aligned parallel to one another or can interlock with one another after the embossing tool has been clamped onto the embossing cylinder.
  • the embossing tool according to the invention results in the embossing tool being held more firmly on the embossing cylinder, as a result of which slipping or shifting of the embossing tool on the embossing cylinder is reduced or prevented. Furthermore, the corrugation of the plate enables the embossing tool to be precisely aligned on the embossing cylinder in the form of a “latching” of the two corrugations into one another in a predetermined position with respect 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 being interlocked with the corrugation on the embossing cylinder during the subsequent clamping of the embossing tool onto the embossing cylinder.
  • the edge areas of the plate interlock with a further corrugation on the embossing cylinder, thereby additionally preventing the embossing plate from slipping or shifting on the embossing cylinder.
  • first structures of the respective corrugation being parallel or almost parallel to the outer edge of the edge regions of the
  • the plate is aligned and a second structure is 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 toothing and / or lateral registration.
  • both the x-axis (parallel to the edge) and the y-axis (transverse to the edge) of the plate can be positioned exactly in relation to each other.
  • a zigzag corrugation 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 rather the exact CAD implementation or galvanic molding of the corrugation of the plate. This means that tolerances when cutting can be significantly larger and the repeatability of a production 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, holding magnetically or using tools to adhere to the embossing cylinder.
  • These can be embossing devices, punching machines, folding machines, offset machines, high pressure machines, coating machines with offset plants or coating units, gravure printing machines, intaglio printing machines 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, flat / round, round / round in the embossed version.
  • bore grits can be made within the corrugated area or in the immediate vicinity 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 its height, width or flank angle.
  • the corrugation can also be matched to existing collets, quick-action clamping rails or other holding tools.
  • the corrugation geometry in e.g. Height, width, distance can be adjusted almost arbitrarily.
  • the embossing tool is a high-pressure plate.
  • This high-pressure plate is particularly preferably galvanically molded from a gravure plate, as is the case, for example, in DE 10 2017 005 838 A1 is known, or molded from a gravure printing plate by means of embossing processes.
  • the width or line width of the structures of the corrugation is at least 30 ⁇ m.
  • the height of the corrugation structures arranged on the front of the plate is at least 10 ⁇ m, advantageously 20 ⁇ m to 100 ⁇ m and particularly advantageously 100 ⁇ m to 750 ⁇ m, in relation to the surrounding surface of the plate.
  • the plate consists of nickel, copper, brass, spring steel or zinc and has a thickness of approximately 150 ⁇ m to approximately 3000 ⁇ 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 plate is particularly advantageously in each case about 1000 mm to about 1200 mm. This varies according to the circumstances of the die plate holder.
  • the number, geometry and occupancy of the structures of the corrugation vary in shape, distribution, size and distance, depending on the requirements of the recording conditions.
  • the substrate into which the embossing structures are molded in the embossing process particularly preferably consists 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, i.e. a paper substrate is covered on either side by a plastic sheet, or a combination of paper-plastic sheet-paper, i.e. a substrate made of a plastic film is covered on both sides by paper.
  • 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, depending on the application, any other suitable weight and strength can be used.
  • 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 papers which are at risk of forgery, such as passports and other identification documents, as well as cards such as, for example, 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 naming of the value document includes all of the above materials, documents and product assurance elements.
  • the register or register in the sense of this invention is the positional accuracy of embossing structures or other elements relative to one another on the front and / or back of an embossing tool or a substrate. For example, even small deviations of less than 0.1 mm between the respective print images significantly disrupt the visual impression when viewing parts of print images that complement one another in an overall print image.
  • DIN 16500-2: 1987-01 defines 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 plate 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 or plate. These terms do not expressly include the side faces of an embossing tool or a plate, which are negligibly small compared to the extent of the embossing tool or the plate and are not included Embossing elements or coatings can be provided.
  • the Fig. 1 shows in side view an embossing tool according to the invention from a plate 1 in a first embodiment with embossing 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 arc-shaped bending of the entire embossing tool and clamping onto an embossing cylinder.
  • On the rear side R of the plate 1 there are 2 depressions 2 'opposite the raised embossed structures, which are produced by the galvanic molding.
  • corrugation 3 on the front side V, which consists of three parallel roof-like elevations, and on the rear side R a corrugation 4, which consists of three parallel depressions.
  • the recesses 4 are arranged or formed exactly opposite the elevations 3.
  • corrugation 6 on the front side V, which consists of three parallel roof-like elevations, and on the rear side R a corrugation 7, which consists of three parallel depressions.
  • the depressions 7 are arranged or formed exactly opposite the elevations 6.
  • the Fig. 2 shows a side view of a stamping tool similar to Fig. 1 .
  • the increases 3 and 6 begin here in contrast to Fig. 1 however not directly on the edges K1 or K2, but are indented by a distance 5 'or 8' from the edges K1 or K2.
  • the distance 5 'and 8' can have any value from 0 mm to a few centimeters, the distance of 0 mm from the embossing tool Fig. 1 corresponds.
  • Fig. 3 shows the embossing tool 1 Fig. 1 , after it was bent almost into a circular arc, shortly before being clamped on a clamping cylinder.
  • the two edge regions 5 and 8 overlap in such a way that the two corrugations 3 and 7 interlock after tensioning and thus prevent the stamping tool from later shifting or slipping on the clamping cylinder.
  • Fig. 4 shows a plan view of the front 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 a circular arc, but in contrast to Fig. 1 even before the edges 10 of the plate are cut off 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 aligned parallel to the outer edge of the respective edge region of the plate 1. After the edges 10 have been cut off and the plate 1 has been bent in the form of a circular arc, correspondingly Fig. 3 interlock the corrugations 11 with the depressions on the back of the plate 1, which lie opposite the corrugations 12, and prevent displacement of the embossing tool 1 in the x direction.
  • the plate 1 has corrugations 13, 14, 15 and 16, which are oriented at an angle of 90 ° transversely to the corrugations 11 and 12 and their outer edge of the edge region of the plate 1, in order to also have a lateral toothing 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 holes can also be made at other points within the corrugation 11 and 12 or outside.

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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)
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 true EP3650242A1 (fr) 2020-05-13
EP3650242B1 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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EP (1) EP3650242B1 (fr)
DE (1) DE102018008225A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091961A1 (fr) * 2013-12-20 2015-06-25 Temicon Gmbh Procédé et dispositif de réalisation 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
WO2019145115A1 (fr) * 2018-01-29 2019-08-01 Giesecke+Devrient Currency Technology Gmbh Dispositif pour fixer un outil d'estampage sur un cylindre d'estampage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091961A1 (fr) * 2013-12-20 2015-06-25 Temicon Gmbh Procédé et dispositif de réalisation 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
WO2019145115A1 (fr) * 2018-01-29 2019-08-01 Giesecke+Devrient Currency Technology Gmbh Dispositif pour fixer un outil d'estampage sur un cylindre d'estampage

Also Published As

Publication number Publication date
DE102018008225A1 (de) 2020-04-23
EP3650242B1 (fr) 2021-08-18

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