EP3513972B1 - Flexible embossing plate for a sheet fed printing machine for security printing - Google Patents
Flexible embossing plate for a sheet fed printing machine for security printing Download PDFInfo
- Publication number
- EP3513972B1 EP3513972B1 EP19156584.5A EP19156584A EP3513972B1 EP 3513972 B1 EP3513972 B1 EP 3513972B1 EP 19156584 A EP19156584 A EP 19156584A EP 3513972 B1 EP3513972 B1 EP 3513972B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- embossing
- plate
- printing
- embossing plate
- sheet
- 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.)
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Links
- 238000004049 embossing Methods 0.000 title claims description 90
- 238000007639 printing Methods 0.000 title claims description 57
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910000639 Spring steel Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 description 27
- 239000011248 coating agent Substances 0.000 description 26
- 239000000123 paper Substances 0.000 description 12
- 239000000976 ink Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 239000003086 colorant Substances 0.000 description 7
- 238000007645 offset printing Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ZINJLDJMHCUBIP-UHFFFAOYSA-N ethametsulfuron-methyl Chemical compound CCOC1=NC(NC)=NC(NC(=O)NS(=O)(=O)C=2C(=CC=CC=2)C(=O)OC)=N1 ZINJLDJMHCUBIP-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/08—Combinations of endless conveyors and grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with 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
- B44B5/02—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
Definitions
- the invention relates generally to the production of security elements with an optically variable structure which consists of a coating with a repeating pattern and a finely structured embossing that is matched to the coating.
- the invention relates in particular to a flexible embossing plate for a sheet-fed printing machine for printing and embossing printed sheets to produce security elements with an optically variable structure, and to a method for producing such an embossing plate.
- Documents of value such as banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports or other identification documents, are often equipped with security elements for protection that both recognize a document of value and check the Allow authenticity of the document of value and at the same time serve as protection against unauthorized reproduction.
- security elements are used that are machine-readable on the one hand, but can also be checked with simple aids or without any aids on the other.
- Particularly suitable are security elements that can be identified and recognized as genuine by users without tools and even in poor lighting conditions. Embossing and haptic features that use both the visual appearance and the tactility of the security features are particularly suitable here.
- Such security elements are used, for example, to protect high-quality pharmaceutical products.
- the applicant's PEAK® feature which represents a three-dimensional security element that is produced exclusively by printing and embossing paper or the cardboard substrate of a packaging, has proven itself. Filigree optical and tactile elements interlock and create a three-dimensional image that changes depending on the viewing angle.
- the production of such security elements is, however, comparatively cost-intensive since several process steps are required and the printing and embossing processes are decoupled from one another.
- a line intaglio printing step is typically required to produce the filigree fine embossing structures, which cannot achieve the desired printing speed for mass production.
- the pamphlet EP 1 629 994 A2 An embossing plate for a hot-cold lamination press with a three-dimensional structure based on a largely defect-free, surface-hard metal sheet of suitable thickness and dimensions and a suitable surface is known.
- the pamphlet WO 94/05501 A1 relates to an embossing system for simultaneous positive and negative embossing of a character in sheet material, which includes an upper plate and a lower plate with positive and negative embossing, respectively, on plate sections which are aligned and complementarily arranged so that during the embossing step the neutral sections of the plates do not have any Apply pressure to the sheet material.
- the invention is based on the object of specifying devices and methods which allow security elements with an optically variable structure from a coating with a repeating pattern and a finely structured one that is matched to the coating Embossing can be produced inexpensively and at high processing speeds.
- an embossing plate provided with a flexible, finely structured embossing plate forms in the embossing unit of the sheet-fed printing machine Embossing cylinder and an impression cylinder a transfer gap through which the printed sheet is fed and provided with the finely structured embossing structure.
- the print sheet can be provided with a single-color or with a multicolored, for example two, three or four-color coating, for which purpose the print sheet can be fed through two or more printing units.
- the number of colors can easily be up to 7.
- the printing inks can be applied adjacent, superimposed or also spaced from one another. Effect colors, such as metallic luster colors, fluorescent colors, colors with machine-readable features such as magnetic colors, infrared-absorbing or infrared-transparent printing inks, can also be used and combined with conventional printing inks. Such effect colors can also give the security element additional machine-readable properties.
- the coating can represent a pattern that is repeated in one or two spatial directions and can consist of linear or non-linear basic elements arranged in a grid-like manner.
- Linear basic elements can run straight or curved, in particular wavy.
- the line widths of linear basic elements are advantageously between 20 ⁇ m and 700 ⁇ m, preferably between 30 ⁇ m and 300 ⁇ m and particularly preferably between 50 ⁇ m and 200 ⁇ m.
- Non-linear basic elements can in particular have a round, oval or polygonally delimited outline shape.
- Non-linear basic elements advantageously have an extension between 20 ⁇ m and 1000 ⁇ m, preferably between 30 ⁇ m and 500 ⁇ m and particularly preferably between 50 ⁇ m and 400 ⁇ m.
- the finely structured embossed structure is matched to the repeating pattern of the coating, so that the embossed structure and the coating, when matched to one another, form the desired optically variable structure of the security element to be produced.
- the embossed structure therefore also advantageously consists of linear or non-linear relief elements that are repeated in the same one- or two-dimensional grid as the basic elements of the coating. Examples of combinations of coating and embossing which can advantageously be used within the scope of the invention can be found in the publications WO 97/17211 A1 , WO 2002/20280 A1 , WO 2004/022355 A2 , WO 2006/018232 A2 and WO 2007/093300 A1 are taken, the disclosure content of which is included in the present application.
- the printed sheet is first provided with the coating and then with the finely structured embossed structure, but it is basically also possible to provide the printed sheet first with the finely structured embossed structure and only then with the coating.
- a compulsory register is created which ensures that the coating produced in the at least one printing unit and the finely structured embossing structure produced in the embossing unit are produced in a matched manner on the printing sheet. Thanks to the guidance in the gripper closure, even very thin papers can be printed and embossed without damaging the paper.
- a sheet-fed printing machine in particular a sheet-fed offset printing machine
- the construction of offset printing machines in particular in series construction enables register-compatible printing with high register-embossing requirements. Due to the very flexible handling of the printing units, it is possible to react quickly in the process to necessary requirements for the color + embossing register.
- substrates made from natural fibers, cotton, cellulose and waste paper are suitable as printing materials.
- Composite materials or pure plastics that are suitable for permanently preserving the embossing can also be used.
- the substrate thickness is advantageously between 0.03 mm and 1.5 mm, preferably between 0.04 mm and 0.5 mm, and particularly preferably between 0.05 mm and 0.4 mm.
- the weight per unit area of the paper is in particular between 40 g / m 2 and 600 g / m 2 , preferably between 50 g / m 2 and 220 g / m 2 , and particularly preferably between 60 g / m 2 and 150 g / m 2 . m 2 .
- an embossing cylinder and an impression cylinder advantageously form a transfer gap for carrying out and embossing the printed sheets, the embossing cylinder being provided with a flexible, finely structured embossing plate.
- An embossing plate of the type described in more detail below is used with particular advantage.
- the impression cylinder is provided with a soft embossing pad, in particular a soft latex cloth, in the embossing area. Outside of the embossing pad, the impression cylinder is advantageously protected from mechanical influences by a protective film.
- the present invention relates to a flexible embossing plate according to claim 1, in particular a flexible embossing plate for a sheet-fed printing machine of the type described above, with a plate carrier and a plateau which is raised relative to the surface of the plate carrier and is provided with a finely structured relief structure.
- the embossing plate is advantageously made of brass, nickel or polymer, particularly advantageously made of spring steel.
- the finely structured relief structure contains linear or non-linear relief elements.
- Linear relief elements (engraved lines) can run straight or curved, in particular wavy.
- Non-linear relief elements can in particular be pyramid-shaped and / or circular-spherical.
- the relief elements are in a one- or two-dimensional Repeated grid, especially in the same grid as the basic elements of the coating.
- the finely structured relief structure of the embossing plate has structure depths between 20 ⁇ m and 250 ⁇ m, preferably between 40 ⁇ m and 150 ⁇ m, particularly preferably between 60 ⁇ m and 120 ⁇ m.
- the structure widths of the relief structure are between 20 ⁇ m and 1500 ⁇ m, preferably between 40 ⁇ m and 1000 ⁇ m, particularly preferably between 60 ⁇ m and 500 ⁇ m.
- the aspect ratio that is to say the ratio of the structure width to the structure depth of the finely structured relief structure, is advantageously between 1: 1 and 10: 1, preferably between 1.5: 1 and 3.5: 1.
- the plate carrier of the embossing plate therefore advantageously has a thickness between 50 ⁇ m and 800 ⁇ m, preferably between 80 ⁇ m and 500 ⁇ m, particularly preferably between 100 ⁇ m and 250 ⁇ m.
- Said raised plateau has a height between 200 ⁇ m and 1000 ⁇ m, preferably between 300 ⁇ m and 750 ⁇ m, particularly preferably between 400 ⁇ m and 600 ⁇ m. Laterally, the plateau advantageously has dimensions of up to 25 mm ⁇ 25 mm.
- the invention finally also includes a method for producing a flexible embossing plate of the type described above according to claim 7, in which a base plate, namely a spring steel plate, is provided, the base plate is etched to form a plate carrier with a raised plateau, and the plateau is through Milling or exposure to laser radiation is provided with a finely structured relief structure.
- Milling can be done, for example, with a graver at an angle of about 40 °, so that an engraving depth of 50% of the engraving width results. If the relief structure is created by the action of laser radiation, the ratio of engraving depth to engraving width can be selected as desired over a wide range.
- FIG. 1 shows schematically an instruction leaflet 10 for a medicament, which, in addition to the usual content information 12 for authenticity assurance, is provided with an embossed security element 14 with a two-colored, optically variable structure.
- Fig. 2 shows the optically variable structure 20 of the security element 14 in more detail in plan view (upper part of the image) and in cross section (lower part of the image) to explain the basic structure of security elements produced with the aid of the embossing plate according to the invention.
- the optically variable structure 20 contains, on the one hand, a two-colored coating 22 of the paper substrate 24 of the instruction leaflet 10, which is formed in the form of a repeating line pattern from two different colored parallel lines 22-1, 22-2.
- the lines 22-1 can for example be printed with red, the lines 22-2 with black printing ink.
- the two-tone coating 22 is combined with a finely structured embossed structure 26, which is embossed into the paper substrate 24 in the form of parallel embossed lines 28.
- the coating 22 and the embossed structure 26 are matched to one another in such a way that the red lines 22-1 lie on the left flanks of the embossed lines 28 in the figure and the black lines 22-2 on the right flanks of the embossed lines 28.
- the coating 22 and the embossed structure 26 together show an optically variable appearance in which when viewed from the left side 30 essentially only the red lines 22-1 of the coating are visible and when viewed from the right side 32 essentially only black lines 22-2 are visible are.
- the red and black lines 22-1, 22-2 can each fill in the inside of a picture motif, so that when tilting back and forth, not only a color change occurs, but also a change of motif.
- the above-described optically variable appearance of the security element 14 results from the coincidence of the period lengths of the line pattern and the embossed structure and the exact registration of the two structures.
- the paper substrate 24 of the instruction leaflet 10 has a small thickness of only about 60 ⁇ m, so that homogeneous embossing 26 of the thin paper without damaging the paper is not without problems in conventional production.
- the security element 14 is therefore produced in a sheet-fed printing machine, which is described in more detail below, using a specially designed flexible embossing plate.
- Fig. 3 shows schematically the structure of a sheet-fed printing machine 40 with a feeder 42 for sheet feeding, two printing units 44-1 and 44-2 for printing a first and a second color on a supplied printing sheet 50, an embossing unit 46 for producing a finely structured embossing on the printed printing sheet 50 , and a delivery 48 for stacking the printed and embossed printed sheets 50.
- the printed sheets 50 are guided within the sheet-fed printing machine 40 by means of conveyor systems on rotating gripper systems in the gripper connection through the two printing units 44-1, 44-2 and the embossing unit 46.
- a print sheet 50 is printed in the first printing unit 44-1 with a first printing ink, for example red printing ink, and is printed in the second printing unit 44-2 with a second printing ink, for example black printing ink, thereby producing the two-tone coating 22.
- the printed sheet 50 is fed from the second printing unit 44-2 into the embossing unit 46, where it is provided with the finely structured embossing 26 with precise registration due to the forced register by the gripper closure.
- the embossing unit 46 of the sheet-fed printing press 40 is shown in FIG Fig. 4 shown schematically in more detail.
- the embossing unit 46 is a modified offset printing unit of the sheet-fed printing press 40, for example a modified coating unit with an ink fountain 60, inking unit 62, dampening unit 64, a printing plate cylinder 66, an embossing cylinder 68 in the form of a modified blanket cylinder and a modified impression cylinder 72.
- the original blanket cylinder of the coating unit was modified in that instead of the rubber blanket, a flexible, finely structured embossing plate 70 was stretched around the cylinder 68.
- the embossing plate 70 contains a finely structured relief structure for producing the desired embossing structure 26 and is described in more detail below.
- the impression cylinder 72 of the offset printing unit was also modified to form the embossing mechanism 46 by gluing a protective film 74 onto the impression cylinder 72, which is replaced in the embossing area by a soft embossing pad in the form of a glued-on soft latex cloth 76.
- the embossing cylinder 68 and the impression cylinder 72 form a transfer gap 78 through which the printed sheets 50 are guided and thereby provided with the finely structured embossing 26.
- Fig. 5 shows the embossing plate 70 according to the invention clamped onto the embossing cylinder 68 in more detail.
- the plateau 82 can be produced, for example, by etching an initially 610 ⁇ m thick spring steel plate.
- a finely structured relief structure 84 which corresponds to the negative shape of the desired embossed structure 26, is produced in the plateau 82 by the action of laser radiation.
- the relief structure 84 consists of a plurality of parallel engraved lines 86 with a period (structure width) of 200 ⁇ m.
Landscapes
- Printing Methods (AREA)
- Credit Cards Or The Like (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Description
Die Erfindung betrifft allgemein die Herstellung von Sicherheitselementen mit einer optisch variablen Struktur, die aus einer Beschichtung mit einem sich wiederholenden Muster und einer zur Beschichtung gepasserten, feinstrukturierten Prägung besteht. Die Erfindung betrifft insbesondere eine flexible Prägeplatte für eine Bogendruckmaschine zum Bedrucken und Prägen von Druckbogen zur Herstellung von Sicherheitselementen mit einer optisch variablen Struktur, sowie ein Verfahren zum Herstellen einer derartigen Prägeplatte.The invention relates generally to the production of security elements with an optically variable structure which consists of a coating with a repeating pattern and a finely structured embossing that is matched to the coating. The invention relates in particular to a flexible embossing plate for a sheet-fed printing machine for printing and embossing printed sheets to produce security elements with an optically variable structure, and to a method for producing such an embossing plate.
Wertdokumente, wie beispielsweise Banknoten, Aktien, Anleihen, Urkunden, Gutscheine, Schecks, hochwertige Eintrittskarten, aber auch andere fälschungsgefährdete Papiere, wie Pässe oder sonstige Ausweisdokumente, werden zur Absicherung oft mit Sicherheitselementen ausgestattet, die sowohl eine Wiedererkennung eines Wertdokuments als auch eine Überprüfung der Echtheit des Wertdokuments gestatten und die zugleich als Schutz vor unerlaubter Reproduktion dienen.Documents of value, such as banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports or other identification documents, are often equipped with security elements for protection that both recognize a document of value and check the Allow authenticity of the document of value and at the same time serve as protection against unauthorized reproduction.
Dabei werden oft Sicherheitselemente eingesetzt, die einerseits maschinenlesbar sind, andererseits aber auch mit einfachen Hilfsmitteln oder ganz ohne Hilfsmittel überprüft werden können. Besonders geeignet sind Sicherheitselemente, die von Benutzern ohne Hilfsmittel und auch bei schlechten Lichtverhältnissen identifiziert und als echt erkannt werden können. Hier eignen sich insbesondere Prägungen und haptische Merkmale, die sowohl das visuelle Erscheinungsbild als auch die Fühlbarkeit der Sicherheitsmerkmale ausnutzen.Often security elements are used that are machine-readable on the one hand, but can also be checked with simple aids or without any aids on the other. Particularly suitable are security elements that can be identified and recognized as genuine by users without tools and even in poor lighting conditions. Embossing and haptic features that use both the visual appearance and the tactility of the security features are particularly suitable here.
Anwendung finden solche Sicherheitselemente beispielsweise bei der Absicherung hochwertiger Pharmaprodukte. In diesem Produktbereich hat sich beispielsweise das PEAK® Merkmal der Anmelderin bewährt, das ein dreidimensionales Sicherheitselement darstellt, das ausschließlich durch das Bedrucken und Prägen von Papier oder des Kartonsubstrats einer Verpackung erzeugt wird. Dabei greifen filigrane optische und taktile Elemente ineinander und sorgen für ein dreidimensionales, sich je nach Betrachtungswinkel, veränderndes Bild. Die Herstellung solcher Sicherheitselemente ist allerdings vergleichsweise kostenintensiv, da mehrere Prozessschritte benötigt werden und der Druck- und der Prägungsvorgang voneinander entkoppelt sind. Darüber hinaus ist für die Erzeugung der filigranen Feinprägestrukturen typischerweise ein Stichtiefdruckschritt erforderlich, der nicht die gewünschte Druckgeschwindigkeit für die Massenfertigung leisten kann.Such security elements are used, for example, to protect high-quality pharmaceutical products. In this product area, for example, the applicant's PEAK® feature, which represents a three-dimensional security element that is produced exclusively by printing and embossing paper or the cardboard substrate of a packaging, has proven itself. Filigree optical and tactile elements interlock and create a three-dimensional image that changes depending on the viewing angle. The production of such security elements is, however, comparatively cost-intensive since several process steps are required and the printing and embossing processes are decoupled from one another. In addition, a line intaglio printing step is typically required to produce the filigree fine embossing structures, which cannot achieve the desired printing speed for mass production.
Aus der Druckschrift
Ausgehend davon liegt der Erfindung die Aufgabe zugrunde, Einrichtungen und Verfahren anzugeben, die es erlauben, Sicherheitselemente mit einer optisch variablen Struktur aus einer Beschichtung mit einem sich wiederholenden Muster und einer zur Beschichtung gepasserten, feinstrukturierten Prägung kostengünstig und mit hohen Verarbeitungsgeschwindigkeiten herzustellen.Proceeding from this, the invention is based on the object of specifying devices and methods which allow security elements with an optically variable structure from a coating with a repeating pattern and a finely structured one that is matched to the coating Embossing can be produced inexpensively and at high processing speeds.
Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by the features of the independent claims. Developments of the invention are the subject of the dependent claims.
Beschrieben wird zunächst ein Verfahren zum Herstellen eines Sicherheitselements mit einer optisch variablen Struktur in einer Bogendruckmaschine, insbesondere einer Bogenoffsetdruckmaschine, bei dem
- ein Druckbogen innerhalb der Bogendruckmaschine mittels Fördersystemen an umlaufenden Greifersystemen im Greiferschluss durch zumindest ein Druckwerk und ein Prägewerk geführt wird,
- der Druckbogen in dem zumindest einen Druckwerk mit einer Beschichtung mit einem sich wiederholenden Muster versehen wird, und
- der Druckbogen in dem Prägewerk mit einer feinstrukturierten Prägestruktur versehen wird,
- wobei die feinstrukturierte Prägestruktur und die Beschichtung durch die Führung des Druckbogens im Greiferschluss zueinander gepassert auf dem Druckbogen erzeugt werden und die optisch variable Struktur des herzustellenden Sicherheitselements bilden.
- a printed sheet within the sheet-fed printing machine is guided through at least one printing unit and one embossing unit by means of conveyor systems on rotating gripper systems in the gripper connection,
- the printed sheet in the at least one printing unit is provided with a coating with a repetitive pattern, and
- the print sheet is provided with a finely structured embossing structure in the embossing unit,
- wherein the finely structured embossed structure and the coating are produced on the printed sheet so that they are matched to one another by guiding the printed sheet in the gripper and form the optically variable structure of the security element to be produced.
In einer vorteilhaften Ausgestaltung bilden in dem Prägewerk der Bogendruckmaschine ein mit einer flexiblen, feinstrukturierten Prägeplatte versehener Prägezylinder und ein Gegendruckzylinder einen Transferspalt, durch den der Druckbogen geführt und dabei mit der feinstrukturierten Prägestruktur versehen wird.In an advantageous embodiment, an embossing plate provided with a flexible, finely structured embossing plate forms in the embossing unit of the sheet-fed printing machine Embossing cylinder and an impression cylinder a transfer gap through which the printed sheet is fed and provided with the finely structured embossing structure.
Der Druckbogen kann mit einer einfarbigen oder auch mit einer mehrfarbigen, beispielsweise zwei-, drei- oder vierfarbigen Beschichtung versehen werden, wozu der Druckbogen durch zwei oder mehr Druckwerke geführt werden kann. Die Farbanzahl kann dabei ohne Weiteres bis zu 7 betragen. Die Druckfarben können angrenzend, überlagernd oder auch voneinander beabstandet aufgebracht sein. Auch Effektfarben, wie etwa Metallglanzfarben, fluoreszierende Farben, Farben mit maschinenlesbaren Merkmalen wie magnetische Farben, Infrarot-absorbierende oder Infrarot-transparente Druckfarben können zum Einsatz kommen und mit herkömmlichen Druckfarben kombiniert sein. Solche Effektfarben können dem Sicherheitselement auch zusätzlich maschinenlesbare Eigenschaften verleihen.The print sheet can be provided with a single-color or with a multicolored, for example two, three or four-color coating, for which purpose the print sheet can be fed through two or more printing units. The number of colors can easily be up to 7. The printing inks can be applied adjacent, superimposed or also spaced from one another. Effect colors, such as metallic luster colors, fluorescent colors, colors with machine-readable features such as magnetic colors, infrared-absorbing or infrared-transparent printing inks, can also be used and combined with conventional printing inks. Such effect colors can also give the security element additional machine-readable properties.
Die Beschichtung kann ein sich in einer oder zwei Raumrichtungen wiederholendes Muster darstellen und aus rasterartig angeordneten linienförmigen oder nicht-linienförmigen Grundelementen bestehen. Linienförmige Grundelemente können gerade oder gekrümmt, insbesondere gewellt verlaufen. Die Linienbreiten linienförmiger Grundelemente liegen vorteilhaft zwischen 20 µm und 700 µm, bevorzugt zwischen 30 µm und 300 µm und besonders bevorzugt zwischen 50 µm und 200 µm. Nicht-linienförmige Grundelemente können insbesondere eine runde, ovale oder polygonal begrenzte Umrissform aufweisen. Nicht-linienförmige Grundelemente haben vorteilhaft eine Ausdehnung zwischen 20 µm und 1000 µm, bevorzugt zwischen 30 µm und 500 µm und besonders bevorzugt zwischen 50 µm und 400 µm.The coating can represent a pattern that is repeated in one or two spatial directions and can consist of linear or non-linear basic elements arranged in a grid-like manner. Linear basic elements can run straight or curved, in particular wavy. The line widths of linear basic elements are advantageously between 20 μm and 700 μm, preferably between 30 μm and 300 μm and particularly preferably between 50 μm and 200 μm. Non-linear basic elements can in particular have a round, oval or polygonally delimited outline shape. Non-linear basic elements advantageously have an extension between 20 μm and 1000 μm, preferably between 30 μm and 500 μm and particularly preferably between 50 μm and 400 μm.
Die feinstrukturierte Prägestruktur ist auf das sich wiederholende Muster der Beschichtung abgestimmt, so dass die Prägestruktur und die Beschichtung zueinander gepassert die gewünschte optisch variable Struktur des herzustellenden Sicherheitselements bilden. Die Prägestruktur besteht daher vorteilhaft ebenfalls aus linienförmigen bzw. nicht-linienförmigen Reliefelementen, die sich im selben ein- oder zweidimensionalen Raster wie die Grundelemente der Beschichtung wiederholen. Beispiele für im Rahmen der Erfindung vorteilhaft einsetzbare Kombinationen von Beschichtung und Prägung können den Druckschriften
Gegenwärtig ist bevorzugt, dass der Druckbogen zunächst mit der Beschichtung und danach mit der feinstrukturierten Prägestruktur versehen wird, es ist jedoch grundsätzlich auch möglich, den Druckbogen zunächst mit der feinstrukturierten Prägestruktur und erst danach mit der Beschichtung zu versehen.It is currently preferred that the printed sheet is first provided with the coating and then with the finely structured embossed structure, but it is basically also possible to provide the printed sheet first with the finely structured embossed structure and only then with the coating.
Durch die Führung der Druckbogen im Greiferschluss entsteht ein Zwangspasser, der sicherstellt, dass die in dem zumindest einen Druckwerk erzeugte Beschichtung und die in dem Prägewerk erzeugte feinstrukturierten Prägestruktur zueinander gepassert auf dem Druckbogen erzeugt werden. Durch die Führung im Greiferschluss können zudem auch sehr dünne Papiere ohne Papierverletzungen bedruckt und geprägt werden.By guiding the printed sheets in the gripper connection, a compulsory register is created which ensures that the coating produced in the at least one printing unit and the finely structured embossing structure produced in the embossing unit are produced in a matched manner on the printing sheet. Thanks to the guidance in the gripper closure, even very thin papers can be printed and embossed without damaging the paper.
Gleichzeitig können durch den Einsatz einer Bogendruckmaschine, insbesondere einer Bogenoffsetdruckmaschine, höchste Verarbeitungsgeschwindigkeiten erreicht werden. Der Aufbau von Offsetdruckmaschinen insbesondere in Reihenbauweise, ermöglicht passergerechtes Drucken mit hoher Passer-Prägeanforderung. Durch die sehr flexible Handhabung der Druckwerke kann auf notwendige Anforderung des Passers Farbe + Prägung schnell im Prozess reagiert werden.At the same time, the use of a sheet-fed printing machine, in particular a sheet-fed offset printing machine, enables the highest processing speeds to be achieved. The construction of offset printing machines in particular in series construction, enables register-compatible printing with high register-embossing requirements. Due to the very flexible handling of the printing units, it is possible to react quickly in the process to necessary requirements for the color + embossing register.
Als Bedruckstoffe kommen insbesondere Substrate aus Naturfasern, Baumwolle, Zellstoff und Altpapier in Frage. Auch Verbundstoffe oder reine Kunststoffe, die geeignet sind, Prägungen dauerhaft zu bewahren, können verwendet werden. Die Substratstärke liegt dabei vorteilhaft zwischen 0,03 mm und 1,5 mm, bevorzugt zwischen 0,04 mm und 0,5 mm, und besonders bevorzugt zwischen 0,05 mm und 0,4 mm. Im Fall von Papiersubstraten liegt das Flächengewicht des Papiers insbesondere zwischen 40 g/m2 und 600 g/m2, bevorzugt zwischen 50 g/m2 und 220 g/m2, und besonders bevorzugt zwischen 60 g/m2 und 150 g/m2.In particular, substrates made from natural fibers, cotton, cellulose and waste paper are suitable as printing materials. Composite materials or pure plastics that are suitable for permanently preserving the embossing can also be used. The substrate thickness is advantageously between 0.03 mm and 1.5 mm, preferably between 0.04 mm and 0.5 mm, and particularly preferably between 0.05 mm and 0.4 mm. In the case of paper substrates, the weight per unit area of the paper is in particular between 40 g / m 2 and 600 g / m 2 , preferably between 50 g / m 2 and 220 g / m 2 , and particularly preferably between 60 g / m 2 and 150 g / m 2 . m 2 .
Weiter wird eine Bogendruckmaschine beschrieben, insbesondere eine Bogenoffsetdruckmaschine, zum Bedrucken und Prägen von Druckbogen zur Herstellung von Sicherheitselementen mit einer optisch variablen Struktur, mit
- zumindest einem Druckwerk, das ausgelegt und eingerichtet ist, die Druckbogen mit einer Beschichtung mit einem sich wiederholenden Muster zu versehen,
- ein Prägewerk, das ausgelegt und eingerichtet ist, die Druckbogen mit einer feinstrukturierten Prägestruktur zu versehen, und
- Fördersystemen zum Führen der Druckbogen innerhalb der Bogendruckmaschine an umlaufenden Greifersystemen im Greiferschluss durch das zumindest eine Druckwerk und das Prägewerk, um die feinstrukturierte Prägestruktur und die Beschichtung zueinander gepassert auf den Druckbogen zu erzeugen und dadurch die optisch variable Struktur der herzustellenden Sicherheitselemente zu bilden.
- at least one printing unit which is designed and set up to provide the printed sheets with a coating with a repeating pattern,
- an embossing unit that is designed and set up to provide the printed sheets with a finely structured embossing structure, and
- Conveyor systems for guiding the printed sheets within the sheet-fed printing machine on rotating gripper systems in the gripper connection through the at least one printing unit and the embossing unit in order to produce the finely structured embossed structure and the coating in a matched manner on the printed sheet and thereby to form the optically variable structure of the security elements to be produced.
Mit Vorteil bilden in dem Prägewerk der Bogendruckmaschine ein Prägezylinder und ein Gegendruckzylinder einen Transferspalt zur Durchführung und Prägung der Druckbogen, wobei der Prägezylinder mit einer flexiblen, feinstrukturierten Prägeplatte versehen ist. Dabei kommt mit besonderem Vorteil eine Prägeplatte der weiter unten genauer beschriebenen Art zum Einsatz.In the embossing unit of the sheet-fed printing machine, an embossing cylinder and an impression cylinder advantageously form a transfer gap for carrying out and embossing the printed sheets, the embossing cylinder being provided with a flexible, finely structured embossing plate. An embossing plate of the type described in more detail below is used with particular advantage.
Der Gegendruckzylinder ist im Prägebereich mit einer weichen Prägeunterlage, insbesondere einem weichen Latextuch versehen. Außerhalb der Prägeunterlage ist der Gegendruckzylinder vorteilhaft durch eine Schutzfolie vor mechanischen Einflüssen geschützt.The impression cylinder is provided with a soft embossing pad, in particular a soft latex cloth, in the embossing area. Outside of the embossing pad, the impression cylinder is advantageously protected from mechanical influences by a protective film.
Die vorliegende Erfindung betrifft eine flexible Prägeplatte nach Anspruch 1, insbesondere eine flexible Prägeplatte für eine Bogendruckmaschine der oben beschriebenen Art, mit einem Plattenträger und einem gegenüber der Oberfläche des Plattenträgers erhabenen Plateau, das mit einer feinstrukturierten Reliefstruktur versehen ist. Die Prägeplatte ist dabei vorteilhaft aus Messing, Nickel oder Polymer, besonders vorteilhaft aus Federstahl gebildet.The present invention relates to a flexible embossing plate according to claim 1, in particular a flexible embossing plate for a sheet-fed printing machine of the type described above, with a plate carrier and a plateau which is raised relative to the surface of the plate carrier and is provided with a finely structured relief structure. The embossing plate is advantageously made of brass, nickel or polymer, particularly advantageously made of spring steel.
Die feinstrukturierte Reliefstruktur enthält linienförmige oder nicht-linienförmige Reliefelemente. Linienförmige Reliefelemente (Gravurlinien) können gerade oder gekrümmt, insbesondere gewellt verlaufen. Nicht-linienförmige Reliefelemente können insbesondere pyramidenförmig und/oder kreiskugelförmig ausgebildet sein. Die Reliefelemente sind in einem ein- oder zweidimensionalen Raster wiederholt, insbesondere im selben Raster wie die Grundelemente der Beschichtung.The finely structured relief structure contains linear or non-linear relief elements. Linear relief elements (engraved lines) can run straight or curved, in particular wavy. Non-linear relief elements can in particular be pyramid-shaped and / or circular-spherical. The relief elements are in a one- or two-dimensional Repeated grid, especially in the same grid as the basic elements of the coating.
In der Erfindung weist die feinstrukturierte Reliefstruktur der Prägeplatte Strukturtiefen zwischen 20 µm und 250 µm, bevorzugt zwischen 40 µm und 150 µm, besonders bevorzugt zwischen 60 µm und 120 µm auf. Die Strukturbreiten der Reliefstruktur liegen zwischen 20 µm und 1500 µm, bevorzugt zwischen 40 µm und 1000 µm, besonders bevorzugt zwischen 60 µm und 500 µm.In the invention, the finely structured relief structure of the embossing plate has structure depths between 20 μm and 250 μm, preferably between 40 μm and 150 μm, particularly preferably between 60 μm and 120 μm. The structure widths of the relief structure are between 20 μm and 1500 μm, preferably between 40 μm and 1000 μm, particularly preferably between 60 μm and 500 μm.
Das Aspektverhältnis, also das Verhältnis von Strukturbreite zu Strukturtiefe der feinstrukturierten Reliefstruktur liegt mit Vorteil zwischen 1:1 und 10:1, bevorzugt zwischen 1,5:1 und 3,5:1.The aspect ratio, that is to say the ratio of the structure width to the structure depth of the finely structured relief structure, is advantageously between 1: 1 and 10: 1, preferably between 1.5: 1 and 3.5: 1.
Da sich die Prägeplatte flexibel um den Gummituchzylinder einer Bogendruckmaschine aufspannen lassen soll, darf die Plattenstärke nicht zu hoch sein. Der Plattenträger der Prägeplatte weist daher vorteilhaft eine Stärke zwischen 50 µm und 800 µm, bevorzugt zwischen 80 µm und 500 µm, besonders bevorzugt zwischen 100 µm und 250 µm auf. Das genannte erhabene Plateau hat eine Höhe zwischen 200 µm und 1000 µm, bevorzugt zwischen 300 µm und 750 µm, besonders bevorzugt zwischen 400 µm und 600 µm. Lateral weist das Plateau vorteilhaft Abmessungen bis zu 25 mm x 25 mm auf.Since the embossing plate should be able to be stretched flexibly around the blanket cylinder of a sheet-fed printing press, the plate thickness must not be too thick. The plate carrier of the embossing plate therefore advantageously has a thickness between 50 μm and 800 μm, preferably between 80 μm and 500 μm, particularly preferably between 100 μm and 250 μm. Said raised plateau has a height between 200 μm and 1000 μm, preferably between 300 μm and 750 μm, particularly preferably between 400 μm and 600 μm. Laterally, the plateau advantageously has dimensions of up to 25 mm × 25 mm.
Die Erfindung enthält schließlich auch ein Verfahren zum Herstellen einer flexiblen Prägeplatte der oben beschriebenen Art nach Anspruch 7, bei dem eine Grundplatte, nämlich eine Federstahlplatte bereitgestellt wird, die Grundplatte geätzt wird, um einen Plattenträger mit einem erhabenen Plateau zu bilden, und das Plateau durch Fräsung oder Einwirkung von Laserstrahlung mit einer feinstrukturierten Reliefstruktur versehen wird. Bei einer Fräsung kann beispielsweise mit einem Stichel mit einem Winkel von etwa 40° gearbeitet werden, so dass sich eine Gravurtiefe von 50% der Gravurbreite ergibt. Wird die Reliefstruktur durch Einwirkung von Laserstrahlung erzeugt, kann das Verhältnis von Gravurtiefe zu Gravurbreite in weiten Bereichen beliebig gewählt werden.The invention finally also includes a method for producing a flexible embossing plate of the type described above according to claim 7, in which a base plate, namely a spring steel plate, is provided, the base plate is etched to form a plate carrier with a raised plateau, and the plateau is through Milling or exposure to laser radiation is provided with a finely structured relief structure. At a Milling can be done, for example, with a graver at an angle of about 40 °, so that an engraving depth of 50% of the engraving width results. If the relief structure is created by the action of laser radiation, the ratio of engraving depth to engraving width can be selected as desired over a wide range.
Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden nachfolgend anhand der Figuren erläutert, bei deren Darstellung auf eine maßstabs- und proportionsgetreue Wiedergabe verzichtet wurde, um die Anschaulichkeit zu erhöhen.Further exemplary embodiments as well as advantages of the invention are explained below with reference to the figures, in the representation of which a reproduction true to scale and proportion was dispensed with in order to increase the clarity.
Es zeigen:
- Fig. 1
- schematisch einen Beipackzettel für ein Arzneimittel mit einem geprägten Sicherheitselement mit einer zweifarbigen optisch variablen Struktur,
- Fig. 2
- die optisch variable Struktur des Sicherheitselements der
Fig. 1 in Aufsicht (oberer Bildteil) und im Querschnitt (unterer Bildteil) genauer, - Fig. 3
- schematisch den Aufbau einer Bogendruckmaschine,
- Fig. 4
- schematisch den Aufbau des Prägewerks der Bogendruckmaschine der
Fig. 3 , und - Fig. 5
- die in dem Prägewerk der
Fig. 4 eingesetzte, erfindungsgemäße Prägeplatte im Querschnitt.
- Fig. 1
- schematically a package insert for a drug with an embossed security element with a two-tone, optically variable structure,
- Fig. 2
- the optically variable structure of the security element of
Fig. 1 in plan view (upper part of the picture) and in cross section (lower part of the picture) more precisely, - Fig. 3
- schematically the structure of a sheet-fed printing machine,
- Fig. 4
- schematically the structure of the embossing unit of the sheet-fed printing machine
Fig. 3 , and - Fig. 5
- those in the embossing unit of
Fig. 4 used, embossing plate according to the invention in cross section.
Die Erfindung wird nun am Beispiel eines geprägten Sicherheitselements für einen Beipackzettel erläutert.
Die optisch variable Struktur 20 enthält zum einen eine zweifarbige Beschichtung 22 des Papiersubstrats 24 des Beipackzettels 10, die in Form eines sich wiederholenden Linienmusters aus zwei verschiedenfarbigen parallelen Linien 22-1, 22-2 gebildet ist. Die Linien 22-1 können beispielsweise mit roter, die Linien 22-2 mit schwarzer Druckfarbe gedruckt sein. Die zweifarbige Beschichtung 22 ist mit einer feinstrukturierten Prägestruktur 26 kombiniert, die in Form paralleler Prägelinien 28 in das Papiersubstrat 24 eingeprägt ist. Die Beschichtung 22 und die Prägestruktur 26 sind dabei so zueinander gepassert, dass die roten Linien 22-1 auf den in der Figur linken Flanken der Prägelinien 28 liegen und die schwarzen Linien 22-2 auf den rechten Flanken der Prägelinien 28. Die Beschichtung 22 und die Prägestruktur 26 zeigen dadurch zusammen ein optisch variables Erscheinungsbild, bei dem bei Betrachtung von der linken Seite 30 im Wesentlichen nur die roten Linien 22-1 der Beschichtung sichtbar sind und bei Betrachtung von der rechten Seite 32 im Wesentlichen nur schwarzen Linien 22-2 sichtbar sind. Durch Hin- und Herkippen des Beipackzettels 10 wechselt das Erscheinungsbild des Sicherheitselements 14 daher zwischen Rot und Schwarz. Die roten und schwarzen Linien 22-1, 22-2 können auch jeweils das Innere eines Bildmotivs ausfüllen, so dass beim Hin- und Herkippen nicht nur ein Farbwechsel, sondern auch ein Motivwechsel auftritt.The optically
Der Abstand g der Prägelinien 28 beträgt im Ausführungsbeispiel g=200 µm, und auch das Linienmuster 22-1, 22-2 wiederholt sich mit einer Periode von 200 µm, wobei die Linienbreiten und die Zwischenräume zwischen den Linien 22-1, 22-2 jeweils 50 µm betragen. Durch die Übereinstimmung der Periodenlängen des Linienmusters und der Prägestruktur und die exakte Passerung der beiden Strukturen ergibt sich das oben beschriebene optisch variable Erscheinungsbild des Sicherheitselements 14.The distance g between the
Es versteht sich, dass die konkrete Gestaltung der
Das Papiersubstrat 24 des Beipackzettels 10 weist eine geringe Dicke von nur etwa 60 µm auf, so dass eine homogene Prägung 26 des dünnen Papiers ohne Papierverletzung bei herkömmlicher Herstellung nicht unproblematisch ist. Erfindungsgemäß wird das Sicherheitselement 14 daher in einer nachfolgend genauer beschriebenen Bogendruckmaschine unter Verwendung einer speziell ausgebildeten flexiblen Prägeplatte erzeugt.The
Die Druckbogen 50 werden innerhalb der Bogendruckmaschine 40 mittels Fördersystemen an umlaufenden Greifersystemen im Greiferschluss durch die beiden Druckwerke 44-1, 44-2 und das Prägewerk 46 geführt.The printed
Dabei wird ein Druckbogen 50 in dem ersten Druckwerk 44-1 mit einer ersten Druckfarbe, beispielsweise roter Druckfarbe, bedruckt und in dem zweiten Druckwerk 44-2 mit einer zweiten Druckfarbe, beispielsweise schwarzer Druckfarbe, bedruckt und dadurch die zweifarbige Beschichtung 22 erzeugt. Vom zweiten Druckwerk 44-2 wird der Druckbogen 50 in das Prägewerk 46 geführt, wo er wegen des Zwangspassers durch den Greiferschluss passergenau mit der feinstrukturierten Prägung 26 versehen wird.A
Der Aufbau des Prägewerks 46 der Bogendruckmaschine 40 ist in
Um den Prägezylinder 68 zu bilden, wurde der ursprüngliche Gummituchzylinder des Lackwerks dadurch modifiziert, dass anstelle des Gummituchs eine flexible, feinstrukturierte Prägeplatte 70 um den Zylinder 68 aufgespannt wurde. Die Prägeplatte 70 enthält eine feinstrukturierte Reliefstruktur zur Erzeugung der gewünschten Prägestruktur 26 und ist weiter unter genauer beschrieben.In order to form the
Auch der Gegendruckzylinder 72 des Offsetdruckwerks wurde zur Bildung des Prägewerks 46 modifiziert, und zwar indem auf den Gegendruckzylinder 72 eine Schutzfolie 74 aufgeklebt wurde, die im Prägebereich durch eine weiche Prägeunterlage in Form eines aufgeklebten weichen Latextuchs 76 ersetzt ist.The
Der Prägezylinder 68 und der Gegendruckzylinder 72 bilden einen Transferspalt 78, durch den die Druckbogen 50 geführt und dabei mit der feinstrukturierten Prägung 26 versehen werden.The
Im Ausführungsbeispiel besteht die Reliefstruktur 84 aus einer Mehrzahl paralleler Gravurlinien 86 mit einer Periode (Strukturbreite) von 200 µm. Die Strukturtiefe r durch die Laserung beträgt im Ausführungsbeispiel r=60 µm, das Aspektverhältnis also 3,3:1. Durch die geringe Schichtdicke t des Plattenträgers 80 kann die feinstrukturierte Prägeplatte 70 flexibel um den Gummituchzylinder aufgespannt werden um den Prägezylinder 68 zu bilden.In the exemplary embodiment, the
- 1010
- BeipackzettelPackage insert
- 1212
- Informationeninformation
- 1414th
- SicherheitselementSecurity element
- 2020th
- optisch variable Strukturoptically variable structure
- 2222nd
- BeschichtungCoating
- 22-1, 22-222-1, 22-2
- LinienLines
- 2424
- PapiersubstratsPaper substrate
- 2626th
- PrägestrukturEmbossing structure
- 2828
- PrägelinienEmbossed lines
- 30,3230.32
- BetrachtungsrichtungenViewing directions
- 4040
- BogendruckmaschineSheet-fed press
- 4242
- AnlegerInvestors
- 44-1, 44-244-1, 44-2
- DruckwerkePrinting units
- 4646
- PrägewerkEmbossing unit
- 4848
- Auslegerboom
- 5050
- DruckbogenPrint sheet
- 6060
- FarbkastenColor box
- 6262
- FarbwerkInking unit
- 6464
- FeuchtwerkDampening system
- 6666
- DruckplattenzylinderPrinting plate cylinder
- 6868
- PrägezylinderEmbossing cylinder
- 7070
- PrägeplatteEmbossing plate
- 7272
- GegendruckzylinderImpression cylinder
- 7474
- SchutzfolieProtective film
- 7676
- LatextuchLatex cloth
- 7878
- TransferspaltTransfer gap
- 8080
- PlattenträgerPlate carrier
- 8282
- Plateauplateau
- 8484
- ReliefstrukturRelief structure
- 8686
- GravurlinienEngraving lines
Claims (7)
- A flexible embossing plate (70) for a sheet-fed printing press (50) for printing on and embossing printing sheets for manufacturing security elements having an optically variable structure, the flexible embossing plate (70) being developed having a plate carrier (80) and, opposite the surface of the plate carrier, a raised plateau (82) having a height between 200 µm and 1000 µm, that is provided with a finely structured relief structure (84) that has structure depths between 20 µm and 250 µm and structure widths between 20 µm and 1500 µm, and that includes line-shaped or non-line-shaped relief elements (86) that are arranged repeatedly in a one- or two-dimensional grid.
- The embossing plate (70) according to claim 1, characterized in that the finely structured relief structure (84) has structure depths between 40 µm and 150 µm, preferably between 60 µm and 120 µm and/or has structure widths between 40 µm and 1000 µm, preferably between 60 µm and 500 µm.
- The embossing plate (70) according to claim 1 or 2, characterized in that the aspect ratio of structure width to structure depth of the finely structured relief structure (84) is between 1:1 and 10:1, preferably between 1.5:1 and 3.5:1.
- The embossing plate (70) according to at least one of claims 1 to 3, characterized in that the plate carrier (80) has a thickness between 50 µm and 800 µm, preferably between 80 µm and 500 µm, particularly preferably between 100 µm and 250 µm.
- The embossing plate (70) according to at least one of claims 1 to 4, characterized in that the raised plateau (82) has a height between 300 µm and 750 µm, preferably between 400 µm and 600 µm.
- The embossing plate (70) according to at least one of claims 1 to 5, characterized in that the line-shaped relief elements (86) run straight or curved, especially in waves, and/or the non-line-shaped relief elements are developed to be pyramid shaped and/or sphere shaped.
- A method for manufacturing a flexible embossing plate (70) according to one of claims 1 to 6 in which a spring-steel plate is provided, the spring-steel plate is etched to form a plate carrier (80) having a raised plateau (82) having a height between 200 µm and 1000 µm, and the plateau (82) is furnished, by milling or the action of laser radiation, with a finely structured relief structure (84) that has structure depths between 20 µm and 250 µm and structure widths between 20 µm and 1500 µm and that includes line-shaped or non-line-shaped relief elements (86) that are arranged repeatedly in a one- or two-dimensional grid.
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DE102015011918.4A DE102015011918A1 (en) | 2015-09-11 | 2015-09-11 | Devices and methods for producing a security element with an optically variable structure |
PCT/EP2016/001524 WO2017041896A2 (en) | 2015-09-11 | 2016-09-09 | Devices and method for producing a security element with an optically variable structure |
EP16763199.3A EP3365175B1 (en) | 2015-09-11 | 2016-09-09 | Devices and method for producing a security element with an optically variable structure |
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EP16763199.3A Division EP3365175B1 (en) | 2015-09-11 | 2016-09-09 | Devices and method for producing a security element with an optically variable structure |
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EP3513972B1 true EP3513972B1 (en) | 2020-11-11 |
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EP19156584.5A Active EP3513972B1 (en) | 2015-09-11 | 2016-09-09 | Flexible embossing plate for a sheet fed printing machine for security printing |
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EP (2) | EP3365175B1 (en) |
DE (1) | DE102015011918A1 (en) |
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CN115362064A (en) * | 2020-03-26 | 2022-11-18 | 东丽株式会社 | Method for producing printed matter, and printed matter |
Family Cites Families (11)
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US5193458A (en) * | 1992-06-23 | 1993-03-16 | Keller James J | Gripper bar conveyor for multiple color offset rotary printing press |
WO1994005501A1 (en) * | 1992-09-09 | 1994-03-17 | Hilglade Pty. Ltd. | Self-inking embossing system |
DE19541064A1 (en) | 1995-11-03 | 1997-05-07 | Giesecke & Devrient Gmbh | Data carrier with an optically variable element |
DE19826974C2 (en) * | 1998-06-18 | 2002-06-20 | Roland Man Druckmasch | embosser |
DE10044465A1 (en) | 2000-09-08 | 2002-03-21 | Giesecke & Devrient Gmbh | Data carrier with an optically variable element |
BR0313312A (en) | 2002-08-13 | 2005-06-14 | Giesecke & Devrient Gmbh | Data bearer with an optically variable element |
DE102005011612A1 (en) | 2004-08-13 | 2006-02-23 | Giesecke & Devrient Gmbh | Data carrier with an optically variable structure |
DE102004041434B4 (en) * | 2004-08-27 | 2013-10-10 | Credit Card Supplies | Method for producing a embossing plate for a hot-cold laminating press with three-dimensional structures |
DE102006006501A1 (en) | 2006-02-13 | 2007-08-16 | Giesecke & Devrient Gmbh | Security element with an optically variable structure |
DE102008013322A1 (en) * | 2007-03-30 | 2008-10-02 | Heidelberger Druckmaschinen Ag | Printing unit of a substrate processing machine |
EP2848424B1 (en) * | 2013-09-13 | 2019-10-23 | HUECK Rheinische GmbH | Method for producing a surface structure on a pressing tool by the application of metal coatings |
-
2015
- 2015-09-11 DE DE102015011918.4A patent/DE102015011918A1/en not_active Withdrawn
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2016
- 2016-09-09 EP EP16763199.3A patent/EP3365175B1/en active Active
- 2016-09-09 WO PCT/EP2016/001524 patent/WO2017041896A2/en active Application Filing
- 2016-09-09 EP EP19156584.5A patent/EP3513972B1/en active Active
Non-Patent Citations (1)
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WO2017041896A2 (en) | 2017-03-16 |
EP3365175B1 (en) | 2019-11-27 |
EP3365175A2 (en) | 2018-08-29 |
WO2017041896A3 (en) | 2017-08-24 |
DE102015011918A1 (en) | 2017-03-16 |
EP3513972A1 (en) | 2019-07-24 |
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