EP3513972A1 - Plaque d'estampage flexible pour une presse à feuilles de l'impression de sécurité - Google Patents

Plaque d'estampage flexible pour une presse à feuilles de l'impression de sécurité Download PDF

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Publication number
EP3513972A1
EP3513972A1 EP19156584.5A EP19156584A EP3513972A1 EP 3513972 A1 EP3513972 A1 EP 3513972A1 EP 19156584 A EP19156584 A EP 19156584A EP 3513972 A1 EP3513972 A1 EP 3513972A1
Authority
EP
European Patent Office
Prior art keywords
microns
embossing
plate
printing
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.)
Granted
Application number
EP19156584.5A
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German (de)
English (en)
Other versions
EP3513972B1 (fr
Inventor
Max Voit
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
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 date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3513972A1 publication Critical patent/EP3513972A1/fr
Application granted granted Critical
Publication of EP3513972B1 publication Critical patent/EP3513972B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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 manufacture of security elements having an optically variable structure consisting of a coating having a repeating pattern and a finely textured embossment adapted for coating.
  • the invention relates to a flexible embossing plate for a sheet-fed printing machine for printing and embossing printed sheets for producing security elements with an optically variable structure, and to a method for producing such an embossing plate.
  • Security documents such as banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other forgery-prone papers, such as passports or other identity documents, are often provided with security elements for the purposes of security, both a recognition of a value document and a review of the Allow the authenticity of the value document and at the same time serve as protection against unauthorized reproduction.
  • Security elements are often used, which are on the one hand machine-readable, on the other hand, however, can also be checked with simple tools or without any aids. Particularly suitable are security elements that can be identified by users without aids and in low light conditions and recognized as genuine. In particular, imprints and haptic features that exploit both the visual appearance and the tactility of the security features are suitable here.
  • Such security elements are used, for example, for securing high-quality pharmaceutical products.
  • the Applicant's PEAK® feature which is a three-dimensional security element created solely by printing on and embossing paper or the paperboard substrate of a package, has been proven. Filigree optical and tactile elements interlock with each other and create a three-dimensional image that changes depending on the viewing angle.
  • the production of such security elements is comparatively expensive, since several process steps are required and the printing and the embossing process are decoupled from each other.
  • the production of filigree fine embossing structures typically requires a gravure printing step that can not provide the desired printing speed for mass production.
  • the object of the invention is to specify devices and methods which make it possible to produce security elements with an optically variable structure from a coating having a repeating pattern and a coating-patterned, finely structured embossing in a cost-effective manner and at high processing speeds.
  • the sheet can be provided with a monochrome or with a multi-colored, for example, two-, three- or four-color coating, to which the sheet can be passed through two or more printing units.
  • the number of colors can easily be up to 7.
  • the inks may be applied adjacent, overlying or even spaced apart.
  • effect colors such as metal gloss, fluorescent colors, colors with machine-readable features such as Magnetic inks, infrared-absorbing or infrared-transparent inks can be used and combined with conventional inks. Such effect colors can also give the security element machine-readable properties.
  • the coating may represent a repeating pattern in one or two spatial directions and may consist of grid-like arranged linear or non-linear basic elements.
  • Line-shaped basic elements can be straight or curved, in particular wavy.
  • the line widths of line-shaped 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 may in particular have a round, oval or polygonal limited 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 matched to one another form the desired optically variable structure of the security element to be produced.
  • the embossed structure therefore advantageously also consists of linear or non-linear relief elements which repeat themselves in the same one or two-dimensional grid as the basic elements of the coating. Examples of combinations of coating and embossing which can be used advantageously within the scope of the invention can be found in the documents WO 97/17211 A1 . WO 2002/20280 A1 . WO 2004/022355 A2 . WO 2006/018232 A2 and WO 2007/093300 A1 are removed, the disclosure content of which is included in the present application in this respect.
  • the printed sheet is first provided with the coating and then with the finely structured embossed structure, but it is also possible in principle to provide the printed sheet first with the finely structured embossed structure and only then with the coating.
  • the gripper closure By guiding the printed sheets in the gripper closure creates a forced pass, which ensures that the coating produced in the at least one printing unit and the finely structured embossing pattern produced in the embossing machine are produced matched to each other on the sheet.
  • the guidance in the gripper closure also allows very thin papers to be printed and embossed without paper damage.
  • 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 basis weight 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 more preferably between 60 g / m 2 and 150 g / m 2 .
  • an embossing cylinder and an impression cylinder form a transfer nip for carrying out and embossing the printed sheets, the embossing cylinder being provided with a flexible, finely structured embossing plate.
  • a stamping plate of the type described in more detail below is used with particular advantage.
  • the impression cylinder is provided in the embossing area with a soft embossing pad, in particular a soft latex cloth. Outside the embossing pad, the impression cylinder is advantageously protected by a protective film against mechanical influences.
  • the invention further comprises a flexible embossing plate for a sheet-fed printing press of the type described above, comprising a plate carrier and a plateau raised with respect to the surface of the plate carrier and provided with a finely textured relief structure.
  • the embossing plate is advantageously made of brass, nickel or polymer, particularly advantageously formed from spring steel.
  • the finely structured relief structure may contain linear or non-linear relief elements.
  • Line-shaped relief elements (engraving lines) can be straight or curved, in particular wavy.
  • Non-linear relief elements may be formed in particular pyramidal and / or circular spherical.
  • the relief elements are advantageously repeated in a one- or two-dimensional grid, in particular in the same grid as the basic elements of the coating.
  • the finely structured relief structure of the embossing plate advantageously 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 advantageously between 20 ⁇ m and 1500 ⁇ m, preferably between 40 ⁇ m and 1000 ⁇ m, particularly preferably between 60 ⁇ m and 500 ⁇ m.
  • the aspect ratio ie the ratio of structure width to 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 of between 50 ⁇ m and 800 ⁇ m, preferably between 80 ⁇ m and 500 ⁇ m, particularly preferably between 100 ⁇ m and 250 ⁇ m.
  • a height between 200 .mu.m and 1000 .mu.m, preferably between 300 .mu.m and 750 .mu.m, more preferably between 400 .mu.m and 600 .mu.m, has proved successful.
  • the plateau advantageously has dimensions of up to 25 mm ⁇ 25 mm.
  • the invention also includes a method of manufacturing a flexible die plate of the type described above, wherein a base plate, in particular a spring steel plate is provided, the base plate is etched to form a plate carrier with a raised plateau, and the plateau by milling or action is provided by laser radiation with a finely textured relief structure.
  • a milling for example, it is possible to work with a stylus with an angle of approximately 40 °, so that an engraving depth of 50% of the engraving width results. If the relief structure is generated by the action of laser radiation, the ratio of engraving depth to engraving width can be chosen arbitrarily over a wide range.
  • FIG. 1 schematically shows a leaflet 10 for a drug, which is provided in addition to the usual content information 12 for authenticity assurance with an embossed security element 14 with a two-color optically variable structure.
  • Fig. 2 to explain the basic structure according to the invention manufactured security elements, the optically variable structure 20 of the security element 14 in plan view (upper part of the picture) and in cross-section (lower part of the image) in more detail.
  • the optically variable structure 20 contains on the one hand a two-colored coating 22 of the paper substrate 24 of the leaflet 10, which is formed in the form of a repeating line pattern of two differently colored parallel lines 22-1, 22-2.
  • lines 22-1 may be printed in red, lines 22-2 in black.
  • the two-color coating 22 is combined with a finely structured embossed structure 26, which is embossed in the form of parallel embossing lines 28 in the paper substrate 24.
  • the coating 22 and the embossed structure 26 are matched to one another such that the red lines 22-1 lie on the left flanks of the embossing lines 28 in the figure and the black lines 22-2 on the right flanks of the embossing lines 28.
  • the coating 22 and Together, the embossing pattern 26 thereby exhibits an optically variable appearance in which substantially only the red lines 22-1 of the coating are visible when viewed from the left side 30 and substantially only black lines 22-2 visible when viewed from the right side 32 are.
  • the red and black lines 22-1, 22-2 can also each fill the inside of a picture motif, so that when going back and forth not only a color change, but also a motif change occurs.
  • the coincidence of the period lengths of the line pattern and the embossed structure and the exact registration of the two structures results in the above-described optically variable appearance of the security element 14.
  • the paper substrate 24 of the leaflet 10 has a small thickness of only about 60 .mu.m, so that a homogeneous embossing 26 of the thin paper without paper damage in conventional production is not without problems.
  • the security element 14 is therefore produced in a sheet-fed printing machine described in more detail below using a specially designed flexible embossing plate.
  • Fig. 3 schematically shows the structure of a sheet-fed printing machine 40 according to the invention 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 fed sheet 50, a stamping unit 46 for producing a fine-textured embossing on the printed sheet 50, and a boom 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 conveying systems on rotating gripper systems in gripper closure by the two printing units 44-1, 44-2 and the embossing machine 46.
  • a printing sheet 50 in the first printing unit 44-1 is printed with a first printing ink, for example red printing ink, and printed in the second printing group 44-2 with a second printing ink, for example black printing ink, thereby producing the two-colored coating 22.
  • a second printing ink for example black printing ink
  • the structure of the embossing unit 46 of the sheet-fed printing machine 40 is in Fig. 4 shown schematically in more detail.
  • the embossing unit 46 is in the exemplary embodiment a modified offset printing unit of the sheet-fed printing machine 40, for example, a modified coating unit with ink fountain 60, inking unit 62, dampening unit 64, a printing plate cylinder 66, a stamping cylinder 68 in the form of a modified blanket cylinder and a modified impression cylinder 72nd
  • the original blanket cylinder of the coating unit was modified in that instead of the blanket, a flexible, finely structured embossing plate 70 was mounted around the cylinder 68.
  • the embossing plate 70 includes a fine textured relief structure for producing the desired embossed structure 26 and is described in more detail below.
  • the impression cylinder 72 of the offset printing unit has been modified to form the embossing unit 46, namely by adhering to the impression cylinder 72, a protective film 74, which is replaced in the embossing area by a soft embossing pad in the form of a glued soft latex cloth 76.
  • the embossing cylinder 68 and the impression cylinder 72 form a transfer nip 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 clamped on the embossing cylinder 68 in more detail.
  • the plateau 82 can be produced, for example, by etching an initially 610 .mu.m thick spring steel plate.
  • a finely textured relief structure 84 is generated by the action of laser radiation, which corresponds to the negative shape of the desired embossed structure 26.
  • the relief structure 84 consists of a plurality of parallel engraved lines 86 having a period (feature width) of 200 ⁇ m.

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  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP19156584.5A 2015-09-11 2016-09-09 Plaque d'estampage flexible pour une presse à feuilles de l'impression de sécurité Active EP3513972B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015011918.4A DE102015011918A1 (de) 2015-09-11 2015-09-11 Einrichtungen und Verfahren zur Herstellung eines Sicherheitselements mit einer optisch variablen Struktur
PCT/EP2016/001524 WO2017041896A2 (fr) 2015-09-11 2016-09-09 Dispositifs et procédé pour produire un élément de sécurité comportant une structure optiquement variable
EP16763199.3A EP3365175B1 (fr) 2015-09-11 2016-09-09 Dispositifs et procédé pour produire un élément de sécurité comportant une structure optiquement variable

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP16763199.3A Division-Into EP3365175B1 (fr) 2015-09-11 2016-09-09 Dispositifs et procédé pour produire un élément de sécurité comportant une structure optiquement variable
EP16763199.3A Division EP3365175B1 (fr) 2015-09-11 2016-09-09 Dispositifs et procédé pour produire un élément de sécurité comportant une structure optiquement variable

Publications (2)

Publication Number Publication Date
EP3513972A1 true EP3513972A1 (fr) 2019-07-24
EP3513972B1 EP3513972B1 (fr) 2020-11-11

Family

ID=56893924

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19156584.5A Active EP3513972B1 (fr) 2015-09-11 2016-09-09 Plaque d'estampage flexible pour une presse à feuilles de l'impression de sécurité
EP16763199.3A Active EP3365175B1 (fr) 2015-09-11 2016-09-09 Dispositifs et procédé pour produire un élément de sécurité comportant une structure optiquement variable

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16763199.3A Active EP3365175B1 (fr) 2015-09-11 2016-09-09 Dispositifs et procédé pour produire un élément de sécurité comportant une structure optiquement variable

Country Status (3)

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EP (2) EP3513972B1 (fr)
DE (1) DE102015011918A1 (fr)
WO (1) WO2017041896A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115362064A (zh) * 2020-03-26 2022-11-18 东丽株式会社 印刷物的制造方法和印刷物

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005501A1 (fr) * 1992-09-09 1994-03-17 Hilglade Pty. Ltd. Systeme de frappe auto-encreur
WO1997017211A1 (fr) 1995-11-03 1997-05-15 Giesecke & Devrient Gmbh Support de donnees portant un element optiquement variable
WO2002020280A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Support de donnees dote d'un element optiquement variable
WO2004022355A2 (fr) 2002-08-13 2004-03-18 Giesecke & Devrient Gmbh Support de données à élément optiquement variable
WO2006018232A1 (fr) 2004-08-13 2006-02-23 Giesecke & Devrient Gmbh Support de donnees ayant une structure optiquement variable
EP1629994A2 (fr) * 2004-08-27 2006-03-01 Austria Card Plastikkarten und Ausweissysteme GmbH Feuille métallique en relief avec une structure tridimensionelle pour la fabrication de documents utilisant une presse de laminage chaude froide
WO2007093300A2 (fr) 2006-02-13 2007-08-23 Giesecke & Devrient Gmbh Élément de sécurité doté d'une structure à effet optique variable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193458A (en) * 1992-06-23 1993-03-16 Keller James J Gripper bar conveyor for multiple color offset rotary printing press
DE19826974C2 (de) * 1998-06-18 2002-06-20 Roland Man Druckmasch Prägevorrichtung
DE102008013322A1 (de) * 2007-03-30 2008-10-02 Heidelberger Druckmaschinen Ag Druckwerk einer Bedruckstoff verarbeitenden Maschine
EP2848424B1 (fr) * 2013-09-13 2019-10-23 HUECK Rheinische GmbH Procédé de fabrication d'une structure de surface sur un outil de presse par l'application de revêtements métalliques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005501A1 (fr) * 1992-09-09 1994-03-17 Hilglade Pty. Ltd. Systeme de frappe auto-encreur
WO1997017211A1 (fr) 1995-11-03 1997-05-15 Giesecke & Devrient Gmbh Support de donnees portant un element optiquement variable
WO2002020280A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Support de donnees dote d'un element optiquement variable
WO2004022355A2 (fr) 2002-08-13 2004-03-18 Giesecke & Devrient Gmbh Support de données à élément optiquement variable
WO2006018232A1 (fr) 2004-08-13 2006-02-23 Giesecke & Devrient Gmbh Support de donnees ayant une structure optiquement variable
EP1629994A2 (fr) * 2004-08-27 2006-03-01 Austria Card Plastikkarten und Ausweissysteme GmbH Feuille métallique en relief avec une structure tridimensionelle pour la fabrication de documents utilisant une presse de laminage chaude froide
WO2007093300A2 (fr) 2006-02-13 2007-08-23 Giesecke & Devrient Gmbh Élément de sécurité doté d'une structure à effet optique variable

Also Published As

Publication number Publication date
EP3365175A2 (fr) 2018-08-29
DE102015011918A1 (de) 2017-03-16
WO2017041896A2 (fr) 2017-03-16
WO2017041896A3 (fr) 2017-08-24
EP3365175B1 (fr) 2019-11-27
EP3513972B1 (fr) 2020-11-11

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