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Dokumentenidentifikation EP0936975 07.08.2003
EP-Veröffentlichungsnummer 0936975
Titel EIN LOCHMUSTER ENTHALTENDES SICHERHEITSMERKMAL
Anmelder Industrial Automation Integrators (IAI) B.V., Veldhoven, NL
Erfinder COBBEN, Ignatius, Johannes, NL-5507 LT Veldhoven, NL;
ELENBAAS, Abraham, NL-4714 RH Sprundel, NL
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 69723283
Vertragsstaaten AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, NL, PT, SE
Sprache des Dokument EN
EP-Anmeldetag 04.11.1997
EP-Aktenzeichen 979125572
WO-Anmeldetag 04.11.1997
PCT-Aktenzeichen PCT/NL97/00604
WO-Veröffentlichungsnummer 0098019869
WO-Veröffentlichungsdatum 14.05.1998
EP-Offenlegungsdatum 25.08.1999
EP date of grant 02.07.2003
Veröffentlichungstag im Patentblatt 07.08.2003
IPC-Hauptklasse B42D 15/00

Beschreibung[en]

The present invention relates to a document to be protected against forgery, comprising a security feature in the form of a perforation pattern, wherein the perforation pattern comprises holes with different sizes.

Such a document is disclosed in DE-U-93 15 294.

In this prior art document the perforation pattern takes the form of a character or a number of characters. The perforation herein is applied in the form of round perforations with different sizes.

Allthough making these perforations already raises a considerable barrier for potential forgers, there exists a need for a security feature which is even more difficult to forge.

This object is achieved by the characterizing features of claim 1.

The perforation pattern is herein formed such that for instance when the thus treated document is held up against the light or placed on a light box, an image becomes visible at the location of the perforation pattern.

It will be apparent that arrangement of such an image comprising brightness tones requires extreme advanced technologies. Such technologies are not easily accessible to potential forgers, so that documents thus provided with such a perforation pattern are very difficult to forge.

Another advantage is that at the position of the perforation the material, for instance paper, plastic or textile is completely removed, so that when for instance the fingertips brush over the document no elevation or channel or burr can be felt at all.

If for instance a perforation pattern were to be applied by forgers by means of for instance conically formed needles, cup-shaped edges or burrs are always created which are easily discernible with the fingertips. This therefore provides a good means of identifying possible forgeries.

According to yet another preferred embodiment, the perforation pattern is a representation of an image arranged on the document by means of a different technique.

Owing to the possibility of visually comparing the image and the perforation, thus without the deployment of complicated assist means being required, a less than perfect forgery of just one of the two becomes immediately recognizable. A high degree of security against fraud is thus obtained.

This measure requires that, in order to make such a document, there must be present means for making the perforation pattern and means for making the associated image with a different technique, respectively means for recording this image and putting it into digital form to enable control of the means necessary for making a perforation pattern.

According to yet another preferred embodiment, the image arranged by means of a different technique is specific to the document. This provides the option of personalizing the document. It will be apparent that this results in an even higher level of security.

An important application of the present invention lies in the fact that the document is a passport and that the image is a passport photograph.

Other preferred embodiments are stated in the remaining sub-claims. It is pointed out here that the invention also relates to a method for applying a security feature in the form of a perforation pattern in a document, wherein the perforation pattern is applied by a laser device which is adapted to successively apply a perforation pattern in the document, wherein the size of the perforation holes or the density of the perforation holes is controlled by means of an electronic representation of the image. The present invention will be elucidated hereinbelow with reference to the annexed figures, in which:

  • figure 1 shows a schematic perspective view of a device for manufacturing a document according to the present invention;
  • figure 2 shows a detail view of a perforation pattern such as illustrated in figure 1;
  • figure 3 is a schematic perspective view of a passport according to the present invention;
  • figure 4 shows a view of a bank note provided with a pattern according to the present invention; and
  • figure 5 shows a postage stamp provided with a perforation pattern according to another embodiment of the present invention.

Before discussion of the technique, it is pointed out that in the present technique the making of brightness tones, as in the graphic art, is possible by means of perforations which are applied according to fixed grid, wherein the size of the perforations is a measure for the intensity and that it is also possible to reproduce brightness tones by making use of perforation holes of equal dimensions, wherein the density of these dimensions is a measure for the intensity. Both options can in principle also be combined.

It is pointed out here that in the graphic art the first option is equivalent to the manner in which black and white photographs are reproduced in newspapers and that an example of the second technique can be found in the series of Netherlands postage stamps in which the likeness of Her Majesty the Queen is represented by dots of varying density.

Shown in figure 1 is a video camera 1 which is directed at a passport photograph 2. Video camera 1 records the image of passport photograph 2, converts it into an electronic form and feeds the thus obtained signal to a computer 3 in which it is stored.

The device shown in figure 1 further comprises a laser beam generating means 4 which is controlled by computer 3. This control relates not only to the intensity and focussing of the laser beam 5 transmitted by laser device 4, but also to the direction in which laser beam 5 is transmitted. It is possible to vary this direction in two planes to apply a perforation pattern 7 in a document 6.

It is pointed out here that such laser devices are known in the prior art; in order to change the laser light beam use is herein made of mirror systems not otherwise shown in figure 1.

It is also possible to have laser device 4 stand still and to cause a carrier on which document 6 is placed to move. It is also possible to cause the carrier to move in one direction and the laser beam in the other direction; the choice between the various possibilities depends on the technology used.

Essential is however that perforation pattern 7 comprises perforation holes of differing diameter, wherein the diameter is a function of the brightness to be represented in the image. Perforation holes of differing density can be made by causing the laser beam to generate more or fewer holes locally.

This is illustrated more clearly in figure 2, which shows a detail of perforation pattern 7. Herein can be seen that in the present embodiment the perforation pattern is formed by perforation holes 8 which are ordered in a regular grid, for instance a rectangular grid. The dimension of the holes is herein a measure for the brightness of the image represented by perforation pattern 7, in the present case the passport photograph 2. It is noted here that the dimensions of the perforation holes can be adjusted continuously, thus in principle in analog manner; by processing with a digital computer a finite, yet large number of stages is however obtained. Tests have demonstrated that it is nevertheless possible to obtain a representation of an image which forms an adequate rendering of the relevant image and can be easily compared therewith.

It will be apparent that in this manner a good authenticity feature is obtained which is difficult to copy.

Shown in figure 3 is a passport 9 in which the photograph 2 is fixed, for instance by means of glue, tubular rivets or other manner of attachment. On the same page, adjacently thereof, a perforation pattern 7 representing the relevant image is applied. A good comparison can be made by holding up the relevant page of the passport to the light.

It is otherwise also possible to apply the perforation pattern on another page of the passport, provided a quick visual comparison is possible. This makes forgery more difficult since at least two different pages must be forged for this purpose. It is also possible to apply the image enlarged, reduced in size or modified in other manner.

Figure 4 shows a banknote 10 which is provided with a perforation pattern 11, in the present case in the form of an owl. This perforation pattern is not related to another image arranged on the banknote but forms exclusively a security feature per se; it is possible to provide banknotes with such a security feature. It is again pointed out that the different with the prior art lies in the fact that the image 11 represents different brightness tones, for instance grey tones. Use is otherwise made herein of a free grid, wherein the dimensions of the perforations are the same and the density of the perforations varies in order to represent the grey tones.

The same applies for the postage stamp 12 shown in figure 5 which is provided with a perforation pattern 13 in the form of a likeness of Her Majesty the Queen; both forms are herein combined, i.e a varying grid, wherein the dimensions of the perforations also differ.


Anspruch[de]
  1. Dokument (6; 9; 10; 12), welches gegen Fälschung zu schützten ist, mit einem Sicherheitsmerkmal in der Gestalt eines Perforationsmusters (7; 11; 13), wobei das Perforationsmuster Löcher (8) mit unterschiedlichen Größen aufweist,

    dadurch gekennzeichnet,
    • dass das Perforationsmuster (7; 11; 13) ein Passfoto repräsentiert und
    • dass das Perforationsmuster (7; 11; 13) mittels Laserlicht erzielbar ist.
  2. Dokument gemäß Anspruch 1,

    dadurch gekennzeichnet, dass das Perforationsmuster (7; 11; 13) sichtbar ist, wenn das Dokument (6; 9; 10; 12) von hinten beleuchtet ist.
  3. Dokument gemäß Anspruch 1 oder 2,

    dadurch gekennzeichnet, dass das Abbild, das vom Perforationsmuster (7; 11; 13) repräsentiert ist, auch an einer anderen Stelle auf dem Dokument (7; 11; 13) mittels einer anderen Technik repräsentiert ist.
  4. Dokument gemäß Anspruch 3,

    dadurch gekennzeichnet, dass das Dokument (6; 9; 10; 12) ein Pass ist.
  5. Dokument gemäß Anspruch 4,

    dadurch gekennzeichnet, dass das Sicherheitsmerkmal (7; 11; 13) an einer anderen Seite des Passes (9) eingebracht ist, als auf jener Seite, auf welcher das Passfoto angeordnet ist.
  6. Dokument gemäß einem der vorhergehenden Ansprüche,

    dadurch gekennzeichnet, dass die Helligkeitstöne mittels Variierens der Dichte der Perforationen (7; 11; 13) realisiert sind.
  7. Dokument gemäß Anspruch 5 oder 6,

    dadurch gekennzeichnet, dass die hellen Töne mittels Variierens großer Perforationslöcher bzw. einer hohen Dichte von Perforationslöchern (8) realisiert sind, und dass die dunklen Töne mittels kleiner Perforationslöchern (8) bzw. einer geringen Dichte von Perforationslöchern repräsentiert sind.
  8. Verfahren zum Aufbringen eines Sicherheitsmerkmals in der Gestalt eines Perforationsmusters (7; 11; 13) in einem Dokument (6; 9; 10; 12),

    dadurch gekennzeichnet, dass das Perforationsmuster (7; 11; 13) ein Abbild eines Passfotos ist und von einer Laservorrichtung aufgebracht wird, welche eingerichtet ist, um sukzessiv das Perforationsmuster (7; 11; 13) in das Dokument (6; 9; 10; 12) einzubringen, wobei die Größe der Perforationslöcher (8) oder die Dichte der Perforationslöcher (8) mittels einer elektronischen Repräsentation der Darstellung gesteuert wird.
  9. Verfahren gemäß Anspruch 8,

    dadurch gekennzeichnet, dass das Dokument (9) ein Pass ist und dass ein Perforationsmuster (11) in den Pass (11) eingebracht wird, welches eine Repräsentation des in dem Pass (9) angeordneten Passfotos (2) ist.
  10. Verfahren gemäß Anspruch 9,

    dadurch gekennzeichnet, dass das Passfoto (2) mittels einer optischen-elektronischen Vorrichtung (4) digitalisiert wird und dass das Perforationsmuster (9) basierend auf der digitalen Reproduktion des Passfotos (2) eingebracht wird.
  11. Verfahren gemäß Anspruch 10,

    dadurch gekennzeichnet, dass das Passfoto (2) in gedruckter Gestalt in dem Pass (9) angeordnet wird.
Anspruch[en]
  1. Document (6;9;10;12) to be protected against forgery, comprising a security feature in the form of a 30perforation pattern (7;11;13) wherein the perforation pattern comprises holes (8) with different sizes,

    characterized in
    • that the perforation pattern (7; 11; 13) extends over a closed surface of the document (6;9;10;12) and represents a passport photograph, and
    • that the perforation pattern (7;11;13) is obtainable by laser light.
  2. Document as claimed in claim 1,

    characterized in that the perforation pattern (7;11;13) is visible when the document (6;9;10;12) is illuminated from the rear.
  3. Document as claimed in claim 1 or 2,

    characterized in that the image represented by the perforation pattern (7;11;13) is also represented on another location on the document (7;11;13) by means of a different technique. document (6;9;10;12).
  4. Document as claimed in claim 3,

    characterized in that the document (6;9;10;12) is a passport.
  5. Document as claimed in claim 4,

    characterized in that the security feature (7;11;13) is applied on a page of the passport (9) other than the page on which the passport photograph is arranged.
  6. Document as claimed in any of the foregoing claims, characterized in that brightness tones are realized by varying the density of the perforations (7;11;13).
  7. Document as claimed in claim 5 or 6;

    characterized in that the light tones are realized by varying large perforation holes respectively a high density of perforation holes (8) and that dark tones are represented by small perforation holes (8) respectively a low density of perforation holes.
  8. Method for applying a security feature in the form of a perforation pattern (7;11;13) in a document (6;9;10;12), characterized in that the perforation pattern (7;11;13) is an image of a passport photograph is applied by a laser device which is adapted to successively apply the perforation pattern (7;11;13) in the document (6;9;10;12), wherein the size of the perforation holes (8) or the density of the perforation holes (8) is controlled by means of an electronic representation of the depiction.
  9. Method as claimed in claim 8,

    characterized in that the document (9) is a passport and that a perforation pattern (11) is applied in the passport (11) which is a representation of the passport photograph (2) arranged in the passport(9).
  10. Method as claimed in claim 9,

    characterized in that the passport photograph (2) is put into digital form by means of an optical electronic device (4) and that the perforation pattern (9) is applied on the basis of the digital reproduction of the passport photograph (2).
  11. Method as claimed in claim 10,

    characterized in that the passport photograph (2) is arranged in printed form in the passport(9).
Anspruch[fr]
  1. Document (6 ; 9 ; 10 ; 12) à protéger contre la contrefaçon, comprenant une caractéristique de sécurité sous la forme d'un schéma de perforation (7 ; 11 ; 13) dans lequel le schéma de perforation comprend des trous (8) de tailles différentes, caractérisé en ce que :
    • le schéma de perforation (7 ; 11 ; 13) s'étend sur une surface fermée du document (6 ; 9 ; 10 ; 12) et représente une photographie de passeport, et
    • le schéma de perforation (7 ; 11 ; 13) peut être obtenu grâce à une lumière laser.
  2. Document selon la revendication 1, caractérisé en ce que le schéma de perforation (7 ; 11 ; 13) est visible lorsque le document (6 ; 9 ; 10 ; 12) est illuminé par l'arrière.
  3. Document selon la revendication 1 ou la revendication 2, caractérisé en ce que l'image représentée par le schéma de perforation (7 ; 11 ; 13) est également représentée à un autre emplacement sur le document (7 ; 11 ; 13) au moyen d'une technique différente.
  4. Document selon la revendication 3, caractérisé en ce que le document (6 ; 9 ; 10 ; 12) est un passeport.
  5. Document selon la revendication 4, caractérisé en ce que la caractéristique de sécurité (7 ; 11 ; 13) est appliquée sur une page du passeport (9) autre que la page sur laquelle la photographie de passeport est disposée.
  6. Document selon l'une quelconque des revendications précédentes, caractérisé en ce que des tons de clarté sont réalisés en faisant varier la densité des perforations (7 ; 11 ; 13).
  7. Document selon la revendication 5 ou la revendication 6, caractérisé en ce que les tons lumineux sont formés par des grands trous de perforation, avec respectivement une densité élevée de trous de perforation (8) et en ce que les tons sombres sont formés par des petits trous de perforation (8) avec respectivement une faible densité de trous de perforation.
  8. Procédé pour appliquer une caractéristique de sécurité sous la forme d'un schéma de perforation (7 ; 11 ; 13) dans un document (6 ; 9 ; 10 ; 12), caractérisé en ce que le schéma de perforation (7 ; 11 ; 13), une image d'une photographie de passeport, est appliqué à l'aide d'un dispositif laser adapté pour appliquer successivement le schéma de perforation (7 ; 11 ; 13) dans le document (6 ; 9 ; 10 ; 12), dans lequel la taille des trous de perforation (8) ou la densité des trous de perforation (8) est commandée à l'aide d'une représentation électronique de l'image.
  9. Procédé selon la revendication 8, caractérisé en ce que le document (9) est un passeport et en ce que le schéma de perforation (11) est appliqué dans le passeport (9) qui est une représentation de la photographie de passeport (2) disposée dans le passeport (9).
  10. Procédé selon la revendication 9, caractérisé en ce que la photographie de passeport (2) est mise sous format numérique à l'aide d'un dispositif électro-optique (4) et en ce que le schéma de perforation (11) est appliqué en se basant sur la reproduction numérique de la photographie de passeport (2).
  11. Procédé selon la revendication 10, caractérisé en ce que la photographie de passeport (2) est disposée sous forme imprimée dans le passeport (9).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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