EP1588332B1 - Security element for valuable documents - Google Patents

Security element for valuable documents Download PDF

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Publication number
EP1588332B1
EP1588332B1 EP03789301A EP03789301A EP1588332B1 EP 1588332 B1 EP1588332 B1 EP 1588332B1 EP 03789301 A EP03789301 A EP 03789301A EP 03789301 A EP03789301 A EP 03789301A EP 1588332 B1 EP1588332 B1 EP 1588332B1
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EP
European Patent Office
Prior art keywords
pattern
security element
patterns
element according
security
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.)
Expired - Lifetime
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EP03789301A
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German (de)
French (fr)
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EP1588332A2 (en
Inventor
Eckhard Braun
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 GmbH
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Giesecke and Devrient GmbH
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Publication of EP1588332A2 publication Critical patent/EP1588332A2/en
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • 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
    • B42D25/41—Marking using electromagnetic radiation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • G07D7/0032—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements using holograms
    • B42D2033/06—
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light

Definitions

  • the invention relates to a security element for value documents, which comprises a translucent carrier material with two patterns, which complement each other only when viewed in transmitted light to a visually recognizable, complete picture.
  • the invention further relates to a security document with such a security element.
  • security elements are for example from the EP 0 388 090 A1 are known and used in particular banknotes, checks, shares, tickets, tickets, identity documents and other paper value documents, but also credit cards, check cards, ID cards and the like.
  • the security documents described there have printed images on the front and back, which complement each other in transmitted light to form a complete picture.
  • Such security elements are difficult to imitate, since they can only be generated register-accurate in simultaneous printing, ie with simultaneous printing on both document surfaces.
  • the printed images can be formed as a line pattern with identically spaced lines of identical width, which complement each other in transmitted light to form a full image.
  • the printed images can be printed with invisible ink, which is, for example, X-ray absorbing, so that the security element is visually unobtrusive and machine-testable.
  • the printed image on the back side of the document is printed with a non-visible ink, thereby preventing falsification by copying.
  • This invisible ink is preferably visible in UV light to allow for machine inspection.
  • JP-A-2167771 suggests the use of IR-transparent and IR-absorbing inks, which appear the same color in the visual spectral range. With the different colors, the bars of a barcode are generated, which then appears to the naked eye as a uniformly colored barcode. The different materials are then only mechanically detectable.
  • patent UK 1534 403 discloses printed images, barcodes and the like, which are printed with printed in the visual spectral range of the same color printing inks, which have different strong absorption properties in the IR spectral range. These inks may be spaced or contiguous, and again in particular, in a same color environment printed with conventional ink so that the image is not visually perceptible but only machine readable.
  • AU 200043751 B2 ( AU734937B A safety device is known, which is provided with imprints on both sides of the substrate, which, viewed through their interaction in the transmitted light, represent information which, viewed in the incident light, is displayed neither by the one nor the other printed marking.
  • the markers can partially overlap.
  • Object of the present invention is to provide a see-through security element, which over conventional see-through elements has increased security and which is visually and preferably also mechanically testable.
  • the object of the present invention is furthermore to propose a security document with correspondingly increased security.
  • the solution according to the invention provides that the two images on the one hand complement one another to provide a complete visual image conveying concrete information or a code, but on the other hand at least partially overlap. This has the consequence that the information is largely obscured even at a slight offset of the two patterns, since in this case also those portions of the one pattern, which would be covered in registry position of the other pattern, contribute to the appearance of the translucent image.
  • one pattern acts as a filter for information conveyed by the other pattern, as long as the two patterns are placed in register.
  • a filter pattern and the overlying pattern which together with the filter pattern in register-containing arrangement conveys information, such as a code, consist of a material which for radiation in a defined, non-visible wavelength range, namely in the IR Spectral range is absorbent, in addition to visual examination Also, a machine transmission test of the see-through security element are performed. It is sufficient if those subregions of the information-conveying pattern in which the information-conveying pattern does not overlap with the filter pattern consist of the absorbing material, or that at least some of these subregions consist of absorbent material.
  • a pattern or both patterns may be made of a color which, viewed in incident light, is not or at least barely visually recognizable to the surrounding color.
  • the filter pattern preferably being a uniform line grid
  • the information-conveying pattern preferably being a grid of staggered lines.
  • the filter pattern can be a grid of staggered lines. Registration-accurate placements of the two line grids are visually very easily recognizable in transmitted light. If the spacing between the lines and the line width of the two patterns are identical, then non-registering placements are more noticeable.
  • the two patterns are preferably printed in simultaneous printing on opposite sides of a translucent substrate, ie on a translucent substrate, so that the two patterns at Reflection in transmitted light to complete a picture.
  • the translucent tare material may for example be the basic material of the value document itself, in the case of banknotes and other value documents, for example paper.
  • the security element can also be designed as a transfer element, which is applied only in a further step to a security document.
  • the security element can also be a security thread for storage in a value document.
  • the two samples are manufactured in a simultaneous printing process. If register-accurate placement of the two patterns is ensured, the patterns can be produced in any desired manner and, if appropriate, also present together on one side of the carrier material.
  • a preferred embodiment of the invention provides, for example, that the filter pattern is formed by a partially demetallized metal layer, wherein on the back of the transfer support material, for example, in the background printing an information-conveying pattern is applied.
  • the metallic filter pattern is completely absorbing for almost all wavelengths, so that the choice of material for the information-conveying pattern is freely selectable within wide ranges. They are subregions of the information-transferring pattern absorbing for radiation in the IR wavelength range. Sensors for detecting IR-absorbing security elements in reflected light and in transmitted light are widespread, comparatively inexpensive and already present in numerous value document checking devices.
  • Fig.1 shows by way of example for all other value documents mentioned above, a banknote 1 with a see-through element 2 and a security thread 3, which appears in the manner of a window security thread periodically on the surface of the banknote 1.
  • the security thread 3 may itself be formed in the same way as described below with respect to the see-through element 2. That is, the security thread can also form an inventive see-through security element.
  • the see-through element 2 is formed by overlapping patterns, of which a first pattern is placed on the front of the banknote and a second pattern on the back of the banknote.
  • the patterns can be applied to the document by printing or transfer.
  • Fig. 2a shows, for example, a first pattern 4, which is hereinafter referred to as "information-conveying pattern", and Fig. 2b shows an associated second pattern 5, hereinafter referred to as "filter pattern”.
  • Both patterns can be seen in reflected light.
  • one of the patterns or both patterns can also be made indistinguishable from the surrounding material in the visual spectral range or can be in the form of background printing, so that they are not recognizable in incident light.
  • Essential for the visual examination is only that the materials of the two patterns according to Fig. 2a and 2b are sufficiently opaque to appear as dark areas in a bright environment when viewed in transmitted light.
  • Fig. 2c is the appearance of the formed by the two patterns 4 and 5 see-through element 2 in transmitted light viewing with normal light.
  • This appearance is hereinafter also referred to as visual transparency image 6.
  • the information may, for example, form a machine-readable code. This information is not derivable from the patterns 4 and 5 taken in isolation. It would also not be reconstructable if the two patterns 4 and 5 were only slightly shifted from each other. Because then, as a visual transparency, the result would be a very irregular pattern.
  • the filtering effect will be explained below in an example region X.
  • the example area X 4 of the information-transferring pattern 4 has four upper lines and four lower lines that are partially offset from each other.
  • the corresponding example region X 5 of the filter pattern 5 has corresponding lines, which are not offset from each other, but are continuous.
  • the lines of the two patterns 4 and 5 have identical width and the distances between the lines correspond to the width of the lines. That is, as far as the lines in the example area X 4 of the information-transferring pattern 4 are offset from the lines of the filter pattern 5, they fill in the gaps between the lines of the filter pattern 5. Incidentally, the lines of the information-conveying pattern 4 and the filter pattern 5 overlap exactly.
  • the in Figure 2c Example area marked X 6 in the transparent image 6, which has a visually clearly recognizable shape. If the example area X 4 of the information-conveying pattern 4 were only slightly or even one line width with respect to the example region X 5 of the filter pattern 5, the exemplary region X 6 of the visual transparency 6 would have a completely different shape. By overlaying the remaining regions of the information-conveying pattern 4 with corresponding regions of the filter pattern 5 according to a similar scheme, the result is an overall easily detectable appearance of the visual transparency image 6 according to FIG Fig. 2c ,
  • the patterns 4 and 5 are made of materials which are absorbent for radiation in the IR wavelength range.
  • the appearance with transmitted light observation in the IR wavelength range then corresponds to the visual transparency image 6 and is referred to below as "IR transparency image 7".
  • the IR transparency 7 using IR-absorbing materials for patterns 4 and 5 is again in FIG Fig. 3c shown.
  • the IR-absorbing partial pattern 4a which also contains the intermediate regions of FIG IR-absorbing filter pattern 5 fills, so that in IR transmission observation, the IR transmission screen 7 according to Fig. 3c results.
  • the IR-transparent partial pattern 4b completely covers up with the filter pattern 5.
  • Fig. 3a and 3b described variant has the advantage that, in addition to the IR transmitted light observation, the IR transparent image 7 according to Fig. 3c leads, even an IR Auflichtbetrachtung leads to a meaningful measurement result, since in IR Auflichtbetrachtung only the actual information, mediating sub-pattern 4a according to Fig. 3a is measured.
  • FIG. 4a An embodiment of the invention is in the Fig. 4a to 4c shown.
  • the information-conveying pattern 4 thus has a different information content, depending on whether it is viewed in normal light or in IR illumination in transmitted light. This is achieved by partially covering intermediate regions of the filter pattern 5 with IR-absorbing material and partly with IR-transparent material of the information-transferring pattern 4.
  • Fig. 4a shows an IR-absorbing partial pattern 4a 'and Fig. 4b an IR-transparent partial pattern 4b ', which in turn together form the information-conveying pattern 4 according to FIG Fig. 2a form.
  • Fig. 4a shows an IR-absorbing partial pattern 4a 'and Fig. 4b an IR-transparent partial pattern 4b ', which in turn together form the information-conveying pattern 4 according to FIG Fig. 2a form.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Business, Economics & Management (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Finance (AREA)
  • Accounting & Taxation (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Printing Methods (AREA)

Abstract

The invention relates to a transparent security element for valuable documents, comprising superimposed patterns on two opposing sides of a translucent carrier material. In a precise arrangement according to register, the two patterns complete each other to form a full image forming a code. If the positioning is not precise according to register, the code is illegible. The patterns consist of IR-absorbent material and can thus be read by a machine. A pattern can consist of IR-absorbent and IR-transparent partial patterns such that when observing transmitted light with normal light, a different transparent image can be recognised to that recognised when observing transmitted light with IR illumination.

Description

Die Erfindung betrifft ein Sicherheitselement für Wertdokumente, welches ein transluzentes Trägermaterial mit zwei Mustern umfasst, die sich erst bei Betrachtung im Durchlicht zu einem visuell erkennbaren, vollständigen Bild ergänzen. Die Erfindung betrifft des Weiteren ein Sicherheitsdokument mit einem solchen Sicherheitselement.The invention relates to a security element for value documents, which comprises a translucent carrier material with two patterns, which complement each other only when viewed in transmitted light to a visually recognizable, complete picture. The invention further relates to a security document with such a security element.

Solche, auch als "Durchsichtselemente" bezeichnete Sicherheitselemente sind beispielsweise aus der EP 0 388 090 A1 bekannt und werden insbesondere bei Banknoten, Schecks, Aktien, Fahrkarten, Eintrittskarten, Ausweispapieren und anderen papierenen Wertdokumenten, aber auch Kreditkarten, Scheckkarten, Ausweiskarten und dergleichen eingesetzt. Die dort beschriebenen Sicherheitsdokumente besitzen auf der Vorder- und Rückseite Druckbilder, die sich im Durchlicht zu einem vollständigen Bild ergänzen. Solche Sicherheitselemente sind schwer nachahmbar, da sie nur im Simultandruck, d.h. bei gleichzeitigem Bedrucken beider Dokumentoberflächen, registergenau erzeugbar sind. Die Druckbilder können als Linienmuster mit identisch beabstandeten Linien identischer Breite ausgebildet sein, die sich im Durchlicht zum Vollbild ergänzen. Zur zusätzlichen Erhöhung der Sicherheit können die Druckbilder mit unsichtbarer Tinte gedruckt werden, die beispielsweise für Röntgenstrahlen absorbierend ist, so dass das Sicherheitselement visuell unauffällig und maschinell prüfbar ist.Such, also referred to as "see-through elements" security elements are for example from the EP 0 388 090 A1 are known and used in particular banknotes, checks, shares, tickets, tickets, identity documents and other paper value documents, but also credit cards, check cards, ID cards and the like. The security documents described there have printed images on the front and back, which complement each other in transmitted light to form a complete picture. Such security elements are difficult to imitate, since they can only be generated register-accurate in simultaneous printing, ie with simultaneous printing on both document surfaces. The printed images can be formed as a line pattern with identically spaced lines of identical width, which complement each other in transmitted light to form a full image. For added security, the printed images can be printed with invisible ink, which is, for example, X-ray absorbing, so that the security element is visually unobtrusive and machine-testable.

In der DE 32 08 204 A1 wird ebenfalls vorgeschlagen, ein Linienmuster jeweils auf die Vorder- und Rückseite eines Dokuments aufzudrucken, wobei die Linienmuster jedoch registerhaltig angeordnet sind, so dass sie einander exakt überdecken. Im Auflicht wie im Durchlicht erkennt man dann ein identisches Linienmuster. Im Falle von nicht im Simultandruck hergestellten Fälschungen, bei denen die Linienmuster auf der Vorder- und Rückseite des Dokuments nicht registergenau aufgetragen sind, lassen sich aufgrund der Feinheit der Linien im Durchlicht Moire-Strukturen erkennen. Alternativ können Moiré-Strukturen beabsichtigt sein und durch gewolltes, gegenseitiges Versetzen in Teilbereichen ein visuell erkennbares Durchsichtsechtheitsmerkmal bilden.In the DE 32 08 204 A1 It is also proposed to print a line pattern on the front and back of a document, however, the line patterns are arranged in register, so that they exactly overlap each other. In reflected light and in transmitted light, one then recognizes an identical line pattern. In the case of non-simulated forgeries where the line patterns on the front and back of the Documents are not registered in register, can be due to the fineness of the lines in transmitted light Moire structures recognize. Alternatively, moiré structures may be intentional and may form a visually perceptible translucency feature by intentional offsetting in portions.

Auch in der EP 0 755 799 A1 wird vorgeschlagen, ein Druckbild, z.B. eine Nummer, registerhaltig auf beiden Seiten des Dokuments aufzubringen, so dass registerungenaue Fälschungen bei Durchlichtbetrachtung identifizierbar sind. Vorzugsweise ist das Druckbild auf der Rückseite des Dokuments mit einer nicht sichtbaren Tinte gedruckt, wodurch ein Fälschen durch Kopieren verhindert wird. Diese nicht sichtbare Tinte ist vorzugsweise im UV-Licht sichtbar, um eine maschinelle Prüfung zu ermöglichen.Also in the EP 0 755 799 A1 It is proposed to apply a printed image, for example a number, in register on both sides of the document, so that register-accurate counterfeits can be identified by viewing the transmitted light. Preferably, the printed image on the back side of the document is printed with a non-visible ink, thereby preventing falsification by copying. This invisible ink is preferably visible in UV light to allow for machine inspection.

Darüber hinaus ist es in anderem Zusammenhang bekannt, Sicherheitsdokumente mit Aufdrucken zu versehen, die besondere Eigenschaften im nicht sichtbaren Spektralbereich besitzen, um maschinenlesbare, visuell nicht unbedingt erkennbare Sicherheitsmerkmale zu erzeugen. So wird beispielsweise in dem Patent CH 287332 ein Sicherheitsdokument mit einem visuell wahrnehmbaren, für IR-Strahlung transparenten Farbaufdruck beschrieben, der im Auflicht farbig erscheint, bei Transmissionsprüfung im IR-Wellenlängenbereich jedoch weiß ist. Eine Farbkopie des Dokuments würde visuell ebenfalls farbig, bei IR-Transmissionsprüfung jedoch schwarz erscheinen und wäre somit als Fälschung identifizierbar.In addition, it is known in other contexts to provide security documents with imprints which have special properties in the non-visible spectral range in order to produce machine-readable, visually not necessarily recognizable security features. For example, in the patent CH 287332 a security document with a visually perceptible, transparent to IR radiation color imprint that appears colored in incident light, but is white in transmission test in the IR wavelength range. A color copy of the document would also be visually colored, but would appear black on IR transmission testing and thus be identifiable as a forgery.

Dieser Gedanke wird in der DE 26 54 208 B2 weiterentwickelt, wo ein IRtransparenter Farbaufdruck, der im visuellen Spektralbereich schwarz erscheint, mit einem schwarzen, IR-absorbierenden Farbaufdruck überdeckt wird oder umgekehrt. Der IR-absorbierende Farbaufdruck kann beispielsweise ein Barcode sein, der jedoch aufgrund der schwarzen Umgebung lediglich bei Betrachtung im IR-Wellenlängenbereich erkennbar ist. Je nachdem, welcher Farbaufdruck außen liegt, ist eine Auflicht- und/ oder Durchlichtprüfung möglich.This thought is in the DE 26 54 208 B2 where an IR-transparent color imprint that appears black in the visual spectral region is covered with a black, IR-absorbing color imprint, or vice versa. For example, the IR-absorbing color imprint a barcode, but due to the black environment is only visible when viewed in the IR wavelength range. Depending on the color imprint on the outside, an incident light and / or transmitted light test is possible.

Auch die JP-A-2167771 schlägt die Verwendung von IR-transparenten und IR-absorbierenden Druckfarben vor, welche im visuellen Spektralbereich gleichfarbig erscheinen. Mit den unterschiedlichen Farben werden die Balken eines Barcodes erzeugt, der dann für das bloße Auge als einheitlich gefärbter Barcode erscheint. Die unterschiedlichen Materialien sind dann lediglich maschinell detektierbar.Also the JP-A-2167771 suggests the use of IR-transparent and IR-absorbing inks, which appear the same color in the visual spectral range. With the different colors, the bars of a barcode are generated, which then appears to the naked eye as a uniformly colored barcode. The different materials are then only mechanically detectable.

Auch die Patentschrift UK 1534 403 offenbart Druckbilder, Barcodes und dergleichen, die mit im visuellen Spektralbereich gleichfarbig erscheinenden Drucktinten gedruckt werden, welche im IR-Spektralbereich unterschiedlich stark ausgeprägte Absorptionseigenschaften besitzen. Diese Druckfarben können voneinander beabstandet oder aneinander grenzend und insbesondere wiederum in einem gleichfarbigen Umfeld, welches mit herkömmlicher Farbe gedruckt ist, vorliegen, so dass das Bild visuell nicht wahrnehmbar, sondern nur maschinenlesbar ist.Also the patent UK 1534 403 discloses printed images, barcodes and the like, which are printed with printed in the visual spectral range of the same color printing inks, which have different strong absorption properties in the IR spectral range. These inks may be spaced or contiguous, and again in particular, in a same color environment printed with conventional ink so that the image is not visually perceptible but only machine readable.

Aus dem Patent Nr 734 937 , AU 200043751 B2 ( AU734937B ) ist eine Sicherheitsvorrichtung bekannt, die mit Aufdrucken auf beiden Seiten des Substrats ausgestattet ist, welche durch ihr Zusammenwirken im Durchlicht betrachtet eine Information darstellen, welche im Auflicht betrachtet weder von der einen noch der anderen aufgedruckten Markierung dargestellt wird. Die Markierungen können sich dabei teilsweise überdecken.From the patent no 734,937 . AU 200043751 B2 ( AU734937B A safety device is known, which is provided with imprints on both sides of the substrate, which, viewed through their interaction in the transmitted light, represent information which, viewed in the incident light, is displayed neither by the one nor the other printed marking. The markers can partially overlap.

Aufgabe der vorliegenden Erfindung ist es, ein Durchsichtssicherheitselement zu schaffen, welches gegenüber herkömmlichen Durchsichtselementen eine erhöhte Sicherheit aufweist und welches visuell und vorzugsweise auch maschinell prüfbar ist. Aufgabe der vorliegenden Erfindung ist es des Weiteren, ein Sicherheitsdokument mit entsprechend erhöhter Sicherheit vorzuschlagen.Object of the present invention is to provide a see-through security element, which over conventional see-through elements has increased security and which is visually and preferably also mechanically testable. The object of the present invention is furthermore to propose a security document with correspondingly increased security.

Diese Aufgabe wird durch ein Sicherheitselement mit den Merkmalen des unabhängigen Anspruchs 1 und durch ein mit einem solchen Sicherheitselement ausgestattetes Sicherheitsdokument gelöst. In davon abhängigen Ansprüchen sind vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung angegeben.This object is achieved by a security element having the features of independent claim 1 and by a security document provided with such a security element. In dependent claims advantageous developments and refinements of the invention are given.

Im Gegensatz zum Stand der Technik, bei dem sich die auf gegenüberliegenden Seiten des Dokuments liegenden Druckbilder entweder registerhaltig vollständig überdecken ( DE 32 08 204 A1 , EP 0 755 799 A1 ) oder zu einem vollständigen Bild ( EP 0 388 090 A1 ) ergänzen, sieht die erfindungsgemäße Lösung vor, dass sich die beiden Bilder einerseits zu einem eine konkrete Information oder einen Code vermittelnden vollständigen Durchsichtsbild ergänzen, andererseits aber zumindest teilweise überlagern. Das hat zur Folge, dass die Information bereits bei einem geringfügigen Versatz der beiden Muster weitgehend verschleiert wird, da in diesem Falle auch diejenigen Teilbereiche des einen Musters, die bei registergenauer Lage von dem anderen Muster überdeckt würden, zum Erscheinungsbild des Durchsichtsbildes beitragen. Das Erkennen von Fälschungen wird dadurch wesentlich erleichtert, da bei nicht registerhaltiger Platzierung der Muster die normalerweise zu erwartende Information bei Durchlichtbetrachtung nicht erkennbar ist. Anders ausgedrückt wirkt das eine Muster als Filter für eine durch das andere Muster vermittelte Information, sofern die beiden Muster registergenau platziert sind.In contrast to the prior art, in which the printed images lying on opposite sides of the document either completely cover each other in register ( DE 32 08 204 A1 . EP 0 755 799 A1 ) or to a complete picture ( EP 0 388 090 A1 ), the solution according to the invention provides that the two images on the one hand complement one another to provide a complete visual image conveying concrete information or a code, but on the other hand at least partially overlap. This has the consequence that the information is largely obscured even at a slight offset of the two patterns, since in this case also those portions of the one pattern, which would be covered in registry position of the other pattern, contribute to the appearance of the translucent image. The detection of counterfeiting is thereby considerably facilitated, since in the case of non-registered placement of the pattern, the normally expected information in the case of transmitted light observation is not recognizable. In other words, one pattern acts as a filter for information conveyed by the other pattern, as long as the two patterns are placed in register.

Indem nun das als Filter dienende Muster und das darüber liegende Muster, welches bei registerhaltiger Anordnung zusammen mit dem Filtermuster eine Information, z.B. einen Code, vermittelt, aus einem Material bestehen, welche für Strahlung in einem definierten, nicht sichtbaren Wellenlängenbereich, nämlich im IR-Spektralbereich absorbierend ist, kann zusätzlich zur visuellen Prüfung auch eine maschinelle Transmissionsprüfung des Durchsichtssicherheitselements durchgeführt werden. Dabei ist es ausreichend, wenn diejenigen Teilbereiche des informationsvermittelnden Musters, in denen sich das informationsvermittelnde Muster nicht mit dem Filtermuster überdeckt, aus dem absorbierenden Material bestehen, oder dass zumindest einzelne dieser Teilbereiche aus absorbierendem Material bestehen. Je nachdem, welche Teilbereiche des informationsvermittelnden Musters in dem definierten, nicht sichtbaren Wellenlängenbereich absorbierend sind, lassen sich unterschiedliche Informationen bei Durchlichtbetrachtung mit sichtbarem Licht einerseits und mit einer Strahlung im unsichtbaren Wellenlängenbereich andererseits erzeugen. Erfindungsgemäß bestehen nun einzelne Teilbereiche des informationsvermittelnden Musters, in denen es sich nicht mit dem Filtermuster überdeckt, aus dem absorbierenden Material.By now serving as a filter pattern and the overlying pattern, which together with the filter pattern in register-containing arrangement conveys information, such as a code, consist of a material which for radiation in a defined, non-visible wavelength range, namely in the IR Spectral range is absorbent, in addition to visual examination Also, a machine transmission test of the see-through security element are performed. It is sufficient if those subregions of the information-conveying pattern in which the information-conveying pattern does not overlap with the filter pattern consist of the absorbing material, or that at least some of these subregions consist of absorbent material. Depending on which subregions of the information-conveying pattern are absorbing in the defined, non-visible wavelength range, different information can be generated when viewing the transmitted light with visible light on the one hand and with radiation in the invisible wavelength range on the other hand. According to the invention, individual subareas of the information-conveying pattern, in which it does not overlap with the filter pattern, now consist of the absorbing material.

Ein Muster oder beide Muster können aus einer Farbe hergestellt sein, die im Auflicht betrachtet gegenüber der Umgebungsfarbe nicht oder zumindest kaum visuell erkennbar ist.A pattern or both patterns may be made of a color which, viewed in incident light, is not or at least barely visually recognizable to the surrounding color.

Besonders ausgeprägt ist die vorbeschriebene Wirkung, wenn es sich bei den beiden Mustern um Linienmuster handelt, wobei das Filtermuster vorzugsweise ein gleichmäßiges Linienraster ist und wobei das informationsvermittelnde Muster vorzugsweise ein Raster aus zueinander versetzten Linien ist. Selbstverständlich kann auch das Filtermuster ein Raster aus zueinander versetzten Linien sein. Registerungenaue Platzierungen der beiden Linienraster sind im Durchlicht visuell sehr einfach erkennbar. Wenn der Abstand zwischen den Linien und die Linienbreite der beiden Muster identisch sind, sind nicht registerhaltige Platzierungen um so auffälliger.The above-described effect is particularly pronounced when the two patterns are line patterns, the filter pattern preferably being a uniform line grid, and the information-conveying pattern preferably being a grid of staggered lines. Of course, the filter pattern can be a grid of staggered lines. Registration-accurate placements of the two line grids are visually very easily recognizable in transmitted light. If the spacing between the lines and the line width of the two patterns are identical, then non-registering placements are more noticeable.

Die beiden Muster werden vorzugsweise im Simultandruck auf gegenüberliegenden Seiten eines transluzenten Trägermaterials aufgedruckt, d.h. auf einem durchscheinenden Trägermaterial, so dass sich die beiden Muster bei Betrachtung im Durchlicht zu einem vollständigen Bild ergänzen. Das transluzente Tägermaterial kann beispielsweise das Grundmaterial des Wertdokuments selbst sein, im Falle von Banknoten und anderen Wertdokumenten beispielsweise Papier. Das Sicherheitselement kann aber auch als Transferelement ausgebildet sein, welches erst in einem weiteren Schritt auf ein Sicherheitsdokument appliziert wird. Das Sicherheitselement kann aber auch ein Sicherheitsfaden zur Einlagerung in ein Wertdokument sein.The two patterns are preferably printed in simultaneous printing on opposite sides of a translucent substrate, ie on a translucent substrate, so that the two patterns at Reflection in transmitted light to complete a picture. The translucent tare material may for example be the basic material of the value document itself, in the case of banknotes and other value documents, for example paper. The security element can also be designed as a transfer element, which is applied only in a further step to a security document. The security element can also be a security thread for storage in a value document.

Es ist nicht zwingend, dass die beiden Muster im Simultandruckverfahren hergestellt werden. Sofern eine registergenaue Platzierung der beiden Muster gewährleistet ist, können die Muster in jeder beliebigen Art und Weise erzeugt und gegebenenfalls auch gemeinsam auf einer Seite des Trägermaterials vorliegen.It is not mandatory that the two samples are manufactured in a simultaneous printing process. If register-accurate placement of the two patterns is ensured, the patterns can be produced in any desired manner and, if appropriate, also present together on one side of the carrier material.

Eine bevorzugte Ausführungsform der Erfindung sieht beispielsweise vor, dass das Filtermuster durch eine teilweise demetallisierte Metallschicht gebildet ist, wobei auf der Rückseite des Transferträgermaterials beispielsweise im Untergrunddruck ein informationsvermittelndes Muster aufgebracht ist. Das metallische Filtermuster ist für nahezu alle Wellenlängen vollständig absorbierend, so dass die Wahl des Materials für das informationsvermittelnde Muster in weiten Bereichen frei wählbar ist. Es sind Teilbereiche des informationsvermittelnden Musters absorbierend für Strahlung im IR-Wellenlängenbereich. Sensoren zur Detektierung von IR-absorbierenden Sicherheitselementen im Auflicht und im Durchlicht sind weit verbreitet, vergleichsweise preiswert und in zahlreichen Wertdokumentprüfungsvorrichtungen bereits vorhanden.A preferred embodiment of the invention provides, for example, that the filter pattern is formed by a partially demetallized metal layer, wherein on the back of the transfer support material, for example, in the background printing an information-conveying pattern is applied. The metallic filter pattern is completely absorbing for almost all wavelengths, so that the choice of material for the information-conveying pattern is freely selectable within wide ranges. They are subregions of the information-transferring pattern absorbing for radiation in the IR wavelength range. Sensors for detecting IR-absorbing security elements in reflected light and in transmitted light are widespread, comparatively inexpensive and already present in numerous value document checking devices.

Nachfolgend wird die Erfindung beispielhaft anhand der begleitenden Zeichnungen erläutert. Es zeigen:

Fig. 1
eine Banknote mit einem Durchsichtssicherheitselement;
Fig. 2a
ein informationsvermittelndes Muster;
Fig. 2b
ein Filtermuster;
Fig. 2c
ein Durchsichtselement, bestehend aus den Mustern gemäß Figuren 2a und 2b bei visueller Durchlichtbetrachtung;
Fig. 3a
ein IR-absorbierendes Teilmuster des informationsvermittelnden Musters aus Figur 2a;
Fig. 3b
ein IR-transparentes Teilmuster des informationsvermittelnden Muster gemäß Figur 2a;
Fig. 3c
ein Durchsichtselement, bestehend aus den Mustern gemäß Figuren 2a und 2b bei IR-Durchlichtbetrachtung, wobei sich das informationsvermittelnde Muster aus Figur 2a aus IR-absorbierenden und IR-transparenten Teilmustern gemäß Fig. 3a, 3b zusammensetzt.
Fig. 4a
ein IR-absorbierendes Teilmuster des informationsvermittelnden Musters aus Fig. 2a;
Fig. 4b
ein IR-transparentes Teilmuster des informationsvermittelnden Musters gemäß Fig. 2a;
Fig. 4c
ein Durchsichtselement, bestehend aus den Mustern gemäß Fig. 2a und 2b bei IR-Durchlichtbetrachtung, wobei sich das infor- mationsvermittelnde Muster aus Fig. 2a aus IR-absorbierenden und IR-transparenten Teilmustern gemäß Fig. 4a, 4b zusammensetzt.
The invention will now be described by way of example with reference to the accompanying drawings. Show it:
Fig. 1
a banknote with a see-through security element;
Fig. 2a
an information-conveying pattern;
Fig. 2b
a filter pattern;
Fig. 2c
a see-through element, consisting of the patterns according to Figures 2a and 2b in visual Durchlichtbetrachtung;
Fig. 3a
an IR-absorbing subpattern of the information-conveying pattern FIG. 2a ;
Fig. 3b
an IR-transparent subpattern of the information-conveying pattern according to FIG. 2a ;
Fig. 3c
a see-through element, consisting of the patterns according to Figures 2a and 2b in IR transmitted light observation, wherein the information-conveying pattern of FIG. 2a from IR-absorbing and IR-transparent partial patterns according to Fig. 3a, 3b composed.
Fig. 4a
an IR-absorbing subpattern of the information-conveying pattern Fig. 2a ;
Fig. 4b
an IR-transparent partial pattern of the information-conveying pattern according to Fig. 2a ;
Fig. 4c
a see-through element consisting of the patterns according to Fig. 2a and 2b with IR transmitted light, whereby the informative mediating patterns Fig. 2a from IR-absorbing and IR-transparent partial patterns according to Fig. 4a, 4b composed.

Fig.1 zeigt beispielhaft für alle anderen eingangs genannten Wertdokumente eine Banknote 1 mit einem Durchsichtselement 2 und einem Sicherheitsfaden 3, der nach Art eines Fenstersicherheitsfadens periodisch an der Oberfläche der Banknote 1 erscheint. Der Sicherheitsfaden 3 kann seinerseits in derselben Weise ausgebildet sein, wie dies nachfolgend in Bezug auf das Durchsichtselement 2 beschrieben wird. Das heißt, der Sicherheitsfaden kann ebenfalls ein erfindungsgemäßes Durchsichtssicherheitselement bilden. Fig.1 shows by way of example for all other value documents mentioned above, a banknote 1 with a see-through element 2 and a security thread 3, which appears in the manner of a window security thread periodically on the surface of the banknote 1. The security thread 3 may itself be formed in the same way as described below with respect to the see-through element 2. That is, the security thread can also form an inventive see-through security element.

Das Durchsichtselement 2 wird gebildet durch einander überdeckende Muster, von denen ein erstes Muster auf der Vorderseite der Banknote und ein zweites Muster auf der Rückseite der Banknote platziert ist. Die Muster können drucktechnisch oder im Transferverfahren auf das Dokument aufgebracht werden.The see-through element 2 is formed by overlapping patterns, of which a first pattern is placed on the front of the banknote and a second pattern on the back of the banknote. The patterns can be applied to the document by printing or transfer.

Fig. 2a zeigt beispielsweise ein erstes Muster 4, welches nachfolgend als "informationsvermittelndes Muster" bezeichnet wird, und Fig. 2b zeigt ein zugehöriges zweites Muster 5, welches nachfolgend als "Filtermuster" bezeichnet wird. Beide Muster können im Auflicht erkennbar sein. Eines der Muster oder beide Muster können aber auch im visuellen Spektralbereich vom Umgebungsmaterial nicht unterscheidbar ausgebildet sein oder als Untergrunddruck vorliegen, so dass sie im Auflicht nicht erkennbar sind. Wesentlich für die visuelle Prüfung ist lediglich, dass die Materialien der beiden Muster gemäß Fig. 2a und 2b ausreichend opak sind, damit sie bei Betrachtung im Durchlicht als dunkle Bereiche in einer hellen Umgebung erscheinen. Fig. 2a shows, for example, a first pattern 4, which is hereinafter referred to as "information-conveying pattern", and Fig. 2b shows an associated second pattern 5, hereinafter referred to as "filter pattern". Both patterns can be seen in reflected light. However, one of the patterns or both patterns can also be made indistinguishable from the surrounding material in the visual spectral range or can be in the form of background printing, so that they are not recognizable in incident light. Essential for the visual examination is only that the materials of the two patterns according to Fig. 2a and 2b are sufficiently opaque to appear as dark areas in a bright environment when viewed in transmitted light.

In Fig. 2c ist das Erscheinungsbild des aus den beiden Mustern 4 und 5 gebildeten Durchsichtselements 2 bei Durchlichtbetrachtung mit normalem Licht dargestellt. Dieses Erscheinungsbild wird nachfolgend auch als visuelles Durchsichtsbild 6 bezeichnet. Man erkennt, wie sich aus dem vergleichsweise unregelmäßigen informationsvermittelnden Muster 4 durch Überlagerung mit dem Filtermuster 5 ein regelmäßiges, eine klare Information vermittelndes visuelles Durchsichtsbild 6 ergibt. Die Information kann beispielsweise einen maschinenlesbaren Code bilden. Diese Information ist aus den Mustern 4 und 5 für sich genommen nicht ableitbar. Sie wäre auch nicht rekonstruierbar, wenn die beiden Muster 4 und 5 nur geringfügig zueinander verschoben wären. Denn dann ergäbe sich als visuelles Durchsichtsbild wiederum ein sehr unregelmäßiges Muster.In Fig. 2c is the appearance of the formed by the two patterns 4 and 5 see-through element 2 in transmitted light viewing with normal light. This appearance is hereinafter also referred to as visual transparency image 6. It can be seen how from the relatively irregular information-conveying pattern 4 by superposition with the filter pattern 5 results in a regular, clear information conveying visual transparency image 6. The information may, for example, form a machine-readable code. This information is not derivable from the patterns 4 and 5 taken in isolation. It would also not be reconstructable if the two patterns 4 and 5 were only slightly shifted from each other. Because then, as a visual transparency, the result would be a very irregular pattern.

Die Filterwirkung wird nachfolgend an einem Beispielsbereich X erläutert. Der Beispielsbereich X4 des informationsvermittelnden Musters 4 besitzt vier obere Linien und vier untere Linien, die teilweise zueinander versetzt sind. Der entsprechende Beispielsbereich X5 des Filtermusters 5 besitzt entsprechende Linien, die jedoch nicht zueinander versetzt, sondern durchgehend sind. Die Linien der beiden Muster 4 und 5 haben identische Breite und die Abstände zwischen den Linien entsprechen der Breite der Linien. Das bedeutet, soweit die Linien in dem Beispielsbereich X4 des informationsvermittelnden Musters 4 gegenüber den Linien des Filtermusters 5 versetzt sind, füllen sie die Zwischenbereiche bzw. Lücken zwischen den Linien des Filtermusters 5 aus. Im Übrigen überdecken sich die Linien des informationsvermittelnden Musters 4 und des Filtermusters 5 exakt. Dementsprechend ergibt sich bei Betrachtung im Durchlicht der in Figur 2c mit X6 gekennzeichnete Beispielsbereich im Durchsichtsbild 6, der eine visuell klar erkennbare Gestalt besitzt. Wäre der Beispielsbereich X4 des informationsvermittelnden Musters 4 nur geringfügig oder auch um eine Linienbreite gegenüber dem Beispielsbereich X5 des Filtermusters 5 verschoben, so hätte der Beispielsbereich X6 des visuellen Durchsichtsbilds 6 eine völlig andere Gestalt. Indem sich die übrigen Bereiche des informationsvermittelnden Musters 4 mit entsprechenden Bereichen des Filtermusters 5 nach einem ähnlichen Schema überlagern, ergibt sich ein insgesamt leicht erfassbares Erscheinungsbild des visuellen Durchsichtsbilds 6 gemäß Fig. 2c.The filtering effect will be explained below in an example region X. The example area X 4 of the information-transferring pattern 4 has four upper lines and four lower lines that are partially offset from each other. The corresponding example region X 5 of the filter pattern 5 has corresponding lines, which are not offset from each other, but are continuous. The lines of the two patterns 4 and 5 have identical width and the distances between the lines correspond to the width of the lines. That is, as far as the lines in the example area X 4 of the information-transferring pattern 4 are offset from the lines of the filter pattern 5, they fill in the gaps between the lines of the filter pattern 5. Incidentally, the lines of the information-conveying pattern 4 and the filter pattern 5 overlap exactly. Accordingly, when viewed in transmitted light, the in Figure 2c Example area marked X 6 in the transparent image 6, which has a visually clearly recognizable shape. If the example area X 4 of the information-conveying pattern 4 were only slightly or even one line width with respect to the example region X 5 of the filter pattern 5, the exemplary region X 6 of the visual transparency 6 would have a completely different shape. By overlaying the remaining regions of the information-conveying pattern 4 with corresponding regions of the filter pattern 5 according to a similar scheme, the result is an overall easily detectable appearance of the visual transparency image 6 according to FIG Fig. 2c ,

Um eine zusätzliche maschinelle Prüfung des Durchsichtselements 2 zu ermöglichen, sind die Muster 4 und 5 aus Materialien hergestellt, die für Strahlung im IR-Wellenlängenbereich absorbierend sind. Das Erscheinungsbild bei Durchlichtbetrachtung im IR-Wellenlängenbereich entspricht dann dem visuellen Durchsichtsbild 6 und wird nachfolgend als "IR-Durchsichtsbild 7" bezeichnet. Das IR-Durchsichtsbild 7 bei Verwendung von IR-absorbierenden Materialien für die Muster 4 und 5 ist nochmals in Fig. 3c dargestellt.To allow additional inspection of the see-through element 2, the patterns 4 and 5 are made of materials which are absorbent for radiation in the IR wavelength range. The appearance with transmitted light observation in the IR wavelength range then corresponds to the visual transparency image 6 and is referred to below as "IR transparency image 7". The IR transparency 7 using IR-absorbing materials for patterns 4 and 5 is again in FIG Fig. 3c shown.

Es ist offensichtlich, dass zur Erlangung des IR-Durchsichtsbilds 7 gemäß Fig. 3c nicht notwendigerweise alle Teilbereiche des informationsvermittelnden Musters 4 aus einem IR-absorbierenden Material bestehen müssen, wenn das Filtermuster 5 selbst auch aus IR-absorbierendem Material besteht. Es reicht aus, wenn lediglich die Teilbereiche des informationsvermittelnden Musters 4 aus einem IR-absorbierenden Material bestehen, welche Zwischenbereiche bzw. Lücken des Filtermusters 5 ausfüllen. In Fig. 3a ist dementsprechend ein IR-absorbierendes Teilmuster 4a des informationsvermittelnden Musters 4 aus Fig. 2a gezeigt. In Fig. 3b ist das entsprechende IRtransparente Teilmuster 4b des informationsvermittelnden Musters 4 aus Fig. 2a gezeigt. Beide Teilmuster 4a, 4b bilden zusammen das informationsvermittelnde Muster 4. Die eigentliche Information vermittelt allerdings nur das IR-absorbierende Teilmuster 4a, welches die Zwischenbereiche des ebenfalls IR-absorbierenden Filtermusters 5 ausfüllt, so dass sich bei IR-Transmissionsbetrachtung das IR-Durchsichtsbild 7 gemäß Fig. 3c ergibt. Das IRtransparente Teilmuster 4b überdeckt sich dagegen vollständig mit dem Filtermuster 5.It is obvious that in order to obtain the IR transparency 7 according to Fig. 3c Not necessarily all parts of the information-conveying pattern 4 must consist of an IR-absorbing material, if the filter pattern 5 itself also consists of IR-absorbing material. It is sufficient if only the subregions of the information-conveying pattern 4 consist of an IR-absorbing material which fill in intermediate regions or gaps of the filter pattern 5. In Fig. 3a Accordingly, an IR-absorbing subpattern 4a of the information-conferring pattern 4 is made Fig. 2a shown. In Fig. 3b is the corresponding IRtransparente partial pattern 4b of the information-conveying pattern 4 from Fig. 2a shown. Both partial patterns 4a, 4b together form the information-conveying pattern 4. The actual information, however, is only provided by the IR-absorbing partial pattern 4a, which also contains the intermediate regions of FIG IR-absorbing filter pattern 5 fills, so that in IR transmission observation, the IR transmission screen 7 according to Fig. 3c results. By contrast, the IR-transparent partial pattern 4b completely covers up with the filter pattern 5.

Die in Bezug auf Fig. 3a und Figur 3b beschriebene Variante hat den Vorteil, dass zusätzlich zu der IR-Durchlichtbetrachtung, die zu dem IR-Durchsichtsbild 7 gemäß Fig. 3c führt, auch eine IR-Auflichtbetrachtung zu einem sinnvollen Messergebnis führt, da bei IR-Auflichtbetrachtung lediglich das die eigentliche Information, vermittelnde Teilmuster 4a gemäß Fig. 3a gemessen wird. Es ergibt sich somit ein identisches Bild bei Durchlichtbetrachtung im visuellen wie im IR-Spektralbereich, wohingegen bei Auflichtbetrachtung im visuellen Spektralbereich keine Information identifizierbar ist, im IR-Spektralbereich jedoch die Information gemäß Teilmuster 4a (Fig. 3a) erkennbar wird.In relation to Fig. 3a and 3b described variant has the advantage that, in addition to the IR transmitted light observation, the IR transparent image 7 according to Fig. 3c leads, even an IR Auflichtbetrachtung leads to a meaningful measurement result, since in IR Auflichtbetrachtung only the actual information, mediating sub-pattern 4a according to Fig. 3a is measured. This results in an identical image when viewed through transmitted light in the visual as in the IR spectral range, whereas no information is identifiable in reflected light viewing in the visual spectral range, but in the IR spectral range, the information according to partial pattern 4a (FIG. Fig. 3a ) becomes recognizable.

Eine Ausführungsform der Erfindung ist in den Fig. 4a bis 4c dargestellt. In diesem Falle unterscheidet sich das IR-Durchsichtsbild 7' von dem visuellen Durchsichtsbild 6. Das informationsvermittelnde Muster 4 besitzt somit einen unterschiedlichen Informationsgehalt, je nachdem, ob es bei normalem Licht oder bei IR-Beleuchtung im Durchlicht betrachtet wird. Dies wird erreicht, indem Zwischenbereiche des Filtermusters 5 teilweise von IR-absorbierendem Material und teilweise von IR-transparentem Material des informationsvermittelnden Musters 4 überdeckt werden. Fig. 4a zeigt dazu ein IR-absorbierendes Teilmuster 4a' und Fig. 4b ein IR-transparentes Teilmuster 4b', die zusammen wiederum das informationsvermittelnde Muster 4 gemäß Fig. 2a bilden. Durch Vergleich mit den Fig. 3a und 3b wird unmittelbar ersichtlich, dass das die eigentliche IR-Information tragende Teilmuster 4a' aus Fig. 4a gegenüber dem IR-absorbierenden Teilmuster 4a aus Fig. 3a reduziert ist. Entsprechend umfangreicher ist das IRtransparente Teilmuster 4b' aus Fig. 4b im Vergleich zu dem IR-transparenten Teilmuster 4b aus Fig. 3b. In Überlagerung mit dem Filtermuster 5 gemäß Fig. 2b ergibt sich damit bei IR-Durchlichtbetrachtung ein IR-Durchsichtsbild 7', wie in Figur 4c dargestellt. Das visuelle Durchsichtsbild 6 ändert sich dadurch jedoch nicht und entspricht dem gemäß Fig. 2c.An embodiment of the invention is in the Fig. 4a to 4c shown. In this case, the IR transparency 7 'differs from the visual transmission image 6. The information-conveying pattern 4 thus has a different information content, depending on whether it is viewed in normal light or in IR illumination in transmitted light. This is achieved by partially covering intermediate regions of the filter pattern 5 with IR-absorbing material and partly with IR-transparent material of the information-transferring pattern 4. Fig. 4a shows an IR-absorbing partial pattern 4a 'and Fig. 4b an IR-transparent partial pattern 4b ', which in turn together form the information-conveying pattern 4 according to FIG Fig. 2a form. By comparison with the Fig. 3a and 3b is immediately apparent that the actual IR information carrying partial pattern 4a 'from Fig. 4a opposite to the IR-absorbing partial pattern 4a off Fig. 3a is reduced. The IR-transparent partial pattern 4b 'is correspondingly more extensive Fig. 4b in comparison to the IR-transparent partial pattern 4b Fig. 3b , In overlay with the filter pattern 5 according to Fig. 2b this results in an IR transparent image 7 ', as in FIG Figure 4c shown. However, the visual transparency 6 does not change thereby and corresponds to FIG Fig. 2c ,

Somit erhält man bei dieser Ausführungsvariante unterschiedliche Durchsichtsbilder 7', 6 bei Betrachtung im IR-Spektralbereich einerseits und bei Betrachtung in normalem Licht andererseits. Darüber hinaus ist auch bei dieser Ausführungsvariante die Information gemäß dem Teilmuster 4a' bei IR-Auflichtbetrachtung wahrnehmbar, wohingegen bei Auflichtbetrachtung unter normalen Bedingungen nur das undefinierte Muster 4 gemäß Fig. 2a sichtbar ist.Thus, in this embodiment, different see-through images 7 ', 6 are obtained when viewed in the IR spectral range on the one hand and when viewed in normal light on the other hand. In addition, the information in accordance with the partial pattern 4a 'is also perceptible in the case of an IR incident light observation in this embodiment variant, whereas only the undefined pattern 4 in accordance with FIG Fig. 2a is visible.

Die in Bezug auf Fig. 4a bis 4c beschriebene Variante ist besonders geeignet für unterschiedliche, chargenbezogene IR-Codierungen von Dokumenten, ohne dass dadurch das visuelle Erscheinungsbild beeinflusst wird.In relation to Fig. 4a to 4c described variant is particularly suitable for different, batch-related IR encodings of documents, without thereby affecting the visual appearance.

Claims (14)

  1. A security element (2) for value documents (1), comprising a translucent, carrier material having a first and a second pattern (4, 5) which complement each other to form a visually recognizable, complete see-through image (6) only on viewing in transmitted light,
    wherein the two patterns partly overlap, and the complemented see-through image (6) is formed by the overlapping and the non-overlapping areas of the two patterns (4, 5),
    wherein the first pattern (4), in individual partial areas where it does not overlap with the second pattern (5), consists of a material that is absorbent to radiation in a defined, invisible wavelength range, and wherein the second pattern (5) is also absorbent to said radiation,
    wherein the first pattern (4) is composed of at least a first and a second partial pattern (4a, 4b; 4a', 4b') consisting of different materials, wherein the material of the first partial pattern (4b; 4b') is transparent in the defined, invisible spectral region and the material of the second partial pattern (4a; 4a') is absorbent in the defined, invisible spectral region,
    characterized in that the defined, invisible spectral region is in the IR spectral region, and that only individual partial areas of the first pattern (4) where the first pattern (4) does not overlap with the second pattern (5) consist of the absorbent material.
  2. The security element according to claim 1, wherein the see-through image (6) forms a machine-readable code.
  3. The security element according to claim 1 or 2, wherein the partial areas of absorbent material of the first pattern (4) form a machine-readable code.
  4. The security element according to any of claims 1 to 3, wherein at least the first pattern (4) is not, or at least hardly, visually recognizable in incident light.
  5. The security element according to any of claims 1 to 4, wherein the first pattern (4) consists of a screen of mutually offset lines.
  6. The security element according to any of claims 1 to 5, wherein the second pattern (5) consists of a line screen.
  7. The security element according to claims 5 and 6, wherein the lines of the first and second patterns (4, 5) have an identical line width and the spacing between the lines corresponds to the line width or to an integral multiple of the line width.
  8. The security element according to any of claims 1 to 7, wherein the first and second patterns (4, 5) are present on opposite sides of the carrier material.
  9. The security element according to any of claims 1 to 8, wherein said element is a transfer element.
  10. The security element according to any of claims 1 to 8, wherein the security element (2) forms an integral part of a security document (1) and the carrier material is formed by the basic material of the security document.
  11. The security element according to any of claims 1 to 8, wherein said element is a security thread.
  12. The security element according to any of claims 1 to 11, wherein at least one of the two patterns (4, 5) is a printed pattern.
  13. The security element according to any of claims 1 to 12, wherein at least one of the two patterns (4, 5) is a partly demetalized metal layer.
  14. A security document (1) comprising a security element according to any of claims 1 to 13.
EP03789301A 2002-12-19 2003-12-16 Security element for valuable documents Expired - Lifetime EP1588332B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10260124A DE10260124A1 (en) 2002-12-19 2002-12-19 Security element for documents of value
DE10260124 2002-12-19
PCT/EP2003/014333 WO2004056582A2 (en) 2002-12-19 2003-12-16 Security element for valuable documents

Publications (2)

Publication Number Publication Date
EP1588332A2 EP1588332A2 (en) 2005-10-26
EP1588332B1 true EP1588332B1 (en) 2012-02-15

Family

ID=32404091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03789301A Expired - Lifetime EP1588332B1 (en) 2002-12-19 2003-12-16 Security element for valuable documents

Country Status (5)

Country Link
EP (1) EP1588332B1 (en)
AT (1) ATE545920T1 (en)
AU (1) AU2003293901B2 (en)
DE (1) DE10260124A1 (en)
WO (1) WO2004056582A2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501989B1 (en) 2004-03-26 2010-04-15 Hueck Folien Gmbh SAFETY FEATURES WITH CHARACTERISTICS VISIBLE UNDER A SPECIFIC OVERVIEW
CN101536045B (en) * 2006-09-07 2011-03-23 马修·沃克 Visual code transaction verification
US8167214B2 (en) 2006-09-07 2012-05-01 Matthew Walker Method and device for visual code transaction verification
GB2470596B (en) * 2009-05-28 2011-07-27 Rue De Int Ltd Improvements in Security devices for security documents
GB2478537B (en) 2010-03-08 2013-07-24 Rue De Int Ltd Improvements in security documents
WO2013143009A1 (en) * 2012-03-29 2013-10-03 Orell Füssli Sicherheitsdruck Ag Security document having an ir, magnetic or fluorescent see-through motif
WO2015095975A1 (en) 2013-12-23 2015-07-02 Orell Füssli Sicherheitsdruck Ag Security device for security document
WO2015095976A1 (en) 2013-12-23 2015-07-02 Orell Füssli Sicherheitsdruck Ag Security device for security document
WO2015161388A1 (en) 2014-04-24 2015-10-29 Orell Füssli Sicherheitsdruck Ag Security device for security document
FR3026987B1 (en) 2014-10-13 2016-12-30 Arjowiggins Security SECURITY ELEMENT, AND SECURE DOCUMENT
DE102016204072B4 (en) 2016-03-11 2018-05-03 Koenig & Bauer Ag Method for checking a register accuracy of printed images to be printed on two opposite sides of a printing substrate
MA47021A (en) 2016-12-16 2019-10-23 Kurz Digital Solutions Gmbh & Co Kg VERIFICATION OF A SAFETY DOCUMENT
DE102019004229A1 (en) * 2019-06-13 2020-12-17 Giesecke+Devrient Currency Technology Gmbh Security element with different printing inks when illuminated with electromagnetic radiation in the infrared wavelength range
DE102019007418A1 (en) * 2019-10-24 2021-04-29 Giesecke+Devrient Currency Technology Gmbh Security element and value document with visually and machine checkable security features that are spatially related to one another

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH287332A (en) * 1948-10-01 1952-11-30 Herbig Wolfgang Ing Dr Document aggravating unauthorized copying.
CH607170A5 (en) * 1976-10-28 1978-11-30 Sodeco Compteurs De Geneve
DE3208204C2 (en) 1982-03-06 1985-12-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Printing process to secure banknotes and documents against unauthorized copying
GB8905471D0 (en) 1989-03-10 1989-04-19 De La Rue Co Plc Sheet with security device
IT1277359B1 (en) 1995-07-26 1997-11-10 Mantegazza A Arti Grafici DOCUMENT WITH ANTIFALSIFICATION MEANS TO PREVENT REPRODUCIBILITY BY PHOTOCOPYING
GB2350319B (en) * 1996-06-14 2001-01-10 Rue De Int Ltd Security printed device

Also Published As

Publication number Publication date
WO2004056582A2 (en) 2004-07-08
ATE545920T1 (en) 2012-03-15
EP1588332A2 (en) 2005-10-26
AU2003293901A1 (en) 2004-07-14
AU2003293901B2 (en) 2008-06-26
WO2004056582A3 (en) 2004-08-05
DE10260124A1 (en) 2004-07-01

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