WO1994020683A1 - Security sheet comprising security elements for preventing duplication, and being recognisable in transmitted and reflected light, and method for making same - Google Patents

Security sheet comprising security elements for preventing duplication, and being recognisable in transmitted and reflected light, and method for making same Download PDF

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Publication number
WO1994020683A1
WO1994020683A1 PCT/FR1994/000226 FR9400226W WO9420683A1 WO 1994020683 A1 WO1994020683 A1 WO 1994020683A1 FR 9400226 W FR9400226 W FR 9400226W WO 9420683 A1 WO9420683 A1 WO 9420683A1
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WO
WIPO (PCT)
Prior art keywords
sheet
security
ribbon
security element
marks
Prior art date
Application number
PCT/FR1994/000226
Other languages
French (fr)
Inventor
Pierre Cochez
Jean-Paul Menez
Original Assignee
Arjo Wiggins S.A.
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.)
Filing date
Publication date
Application filed by Arjo Wiggins S.A. filed Critical Arjo Wiggins S.A.
Priority to DE69410241T priority Critical patent/DE69410241T2/en
Priority to EP94908389A priority patent/EP0687326B1/en
Publication of WO1994020683A1 publication Critical patent/WO1994020683A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/42—Ribbons or strips

Definitions

  • security elements can be security wires which are small strips of plastic material, of metal which are incorporated into the sheet of paper during its manufacture. These wires are identifiable in transmitted light.
  • EP-A-59056 and EP-A-229645 methods for incorporating a security thread into the paper so that it exits in certain places from the mass of the paper. These methods are advantageous when the wire has metallic reflection properties and is therefore shiny. Such reflective threads cannot be reproduced by photocopying. Instead of the reflective surface of the wire, only a dark spot appears, which helps to distinguish the original from the copy.
  • EP-A-377167 describes security papers comprising security wires located at least at one point on the surface of the paper, comprising structures deflecting light, for example holograms.
  • the wire when a photocopy of such security paper is made, the wire can be reproduced with a dark line and a reflective or fluorescent surface can be reproduced by a varnish.
  • the invention aims to provide a security document avoiding the drawbacks mentioned above.
  • the invention therefore relates to a security sheet comprising at least one discontinuous security element located at a point on the surface of the sheet, characterized in that a part of the security element is located on the surface of the sheet. and that the complementary part of the security element is located inside the sheet.
  • the security element may for example comprise at least one reflecting metallic surface, or a light-diffracting surface or an iridescent, or dichroic surface, or may comprise a hologram or an opaque coating of liquid crystals.
  • the sheet is such that it has on one side at least one window whose total area is less than the total area of the security element.
  • the process for manufacturing a security document according to the invention is such that a security thread consisting of a ribbon bearing visible marks in reflected light is introduced during the papermaking process, for example metallic, iridescent, dichroic marks, holograms, marks made of liquid crystal coatings.
  • the tape can be water soluble.
  • it can be polyvinyl alcohol (PVA) or more generally it is a water-soluble ester.
  • the tape can also be a tape support made beforehand so as to be integrated and invisible in the finished sheet.
  • This strip can be obtained by papermaking from a fibrous composition of cellulose fibers and water-soluble ester fibers, for example PVA.
  • the ribbon is then introduced during the manufacture of the security sheet, so that the marks appear on the surface of the paper, but only for part, the complementary part of the mark being inside the paper.
  • Figure 1 is a top view of a security sheet according to the invention, this sheet being seen in transmitted light.
  • Figure 2 is a top view of a sheet according to Figure 1, the sheet being viewed in reflected light.
  • Figure 3 is a sectional view of a sheet according to the invention.
  • Figure 4 is a plan view of a ribbon used to make the sheet according to the invention.
  • FIG. 5 is a view of a round-shaped paper machine for carrying out the method according to the invention.
  • FIG. 1 there is shown a security sheet 1 according to the invention.
  • the sheet 1 comprises at least one discontinuous security element 2 located at a point on the surface S of the sheet.
  • the security element 2 is located partly on the surface of the sheet 1.
  • the part 3 of the element situated on the surface of the sheet is a rectangle.
  • the complementary part 4 of the element 2 which is located inside the sheet is the part 4 formed by the total surface of the security element minus the part 3.
  • the security element 2 has a star shape in FIG. 1.
  • the security element 2 When the sheet 1 is seen in reflected light, only the rectangle is seen and when the sheet is seen in transmitted light, namely when the sheet is seen in transparency , we see the security element 2 as a whole, that is to say in the star form.
  • the security element is a metallic print or a hologram, or an iridescent layer or a dichroic element.
  • the ribbon 6 shown in FIG. 4 is a ribbon which can be soluble in water, for example an ester and more particularly a polyvinyl alcohol.
  • the ribbon 6 can also be a ribbon obtained by the papermaking process using a mixture of cellulose fibers and water-soluble material, such as PVA, the respective amounts of cellulose fibers and PVA being regulated. by a person skilled in the art so that when the ribbon 6 is introduced into the sheet 1, this ribbon is invisible.
  • Marks 7 are deposited on the ribbon 6 which are obtained by depositing a metal such as aluminum over the entire surface of the ribbon, and printing a varnish insoluble in soda, this impression corresponding to marks 7 which we want to achieve. Then remove the unprotected aluminum using sodium hydroxide. It is also possible to print the marks 7 using a metallic ink or a varnish containing iridescent pigments. We can also deposit and secure dichroic elements. You can also make marks 7 in the form of holograms. Marks 7 can also be printed using fluorescent ink. Finally, the marks 7 can be produced in the form of bar codes for printing metallic lines or magnetic / metallic lines.
  • a round-shaped paper machine comprises an aqueous suspension 8 of cellulose fibers, binders and possibly other compounds usually used to form a sheet of paper.
  • a round shape 9 consists of a grid in the form of a cylinder.
  • the composition is deposited on the grid when it rotates in the direction of the arrow FI.
  • the sheet 1 forms on the cylinder and is pulled by the roller 10 and is transferred to a felt 11 to be then dried.
  • the strip 6 has markings 7. adjusts the distance d between the consecutive marks 7, as well as the distance between the windows 5 by locating the tape 6 relative to the sheet 1 and by the running speeds of the tape 6 and the sheet 1.
  • the windows are produced by embossing carried out on the grid the round shape 9. These windows 5 are in fact watermarks. The shape of the embossings (not shown in Figure 5) depends on the desired shape of the windows.
  • Example 1 the sheet according to the invention can be produced by a double jet process.
  • a sheet is produced by the papermaking process from a fibrous composition containing 40 parts of cellulose fibers refined at 45 degrees Schopper and 60 parts of PVA fibers and optionally conventional adjuvants used in stationery.
  • the sheet is dried at a temperature below that of thermosolubilization of PVA fibers used, that is to say at a temperature below 60 ° C.
  • the size of the windows is adjusted by means of the embossing so as to be smaller than the size of the marks. Similarly, the distance between the windows is adjusted so that the marks coincide with the windows. The speeds of the round shape and the unwinding of the ribbon are also adjusted to make the windows and the marks coincide.
  • the dissolution of the PVA fibers leads to a transparency of the paper sheet, but this transparency is compensated for by the cellulose fibers of the ribbon.
  • a sheet of paper comprising windows through which the holograms can be seen with the naked eye and this by reflection.
  • the marks will appear to have a shape distinct from the shape of the windows.
  • the ribbon supporting the marks will not appear in transparency.
  • a layer of aluminum is deposited under vacuum. Marks are printed on aluminum using a soda-resistant varnish. The unprotected aluminum is dissolved using a sodium hydroxide solution.
  • the sheet is cut in the form of a ribbon which is introduced between two jets of wet paper, one of which has windows obtained by embossing the canvas of the round shape.
  • the two jets of paper are then pressed and dried.
  • a finished sheet is obtained which comprises windows through which one can see with the naked eye by reflection the reflective surface of aluminum and by transparency marks different in shape from the shape of the windows.

Abstract

A security sheet comprising at least one discontinuous security element (2) on the sheet surface (S). One portion (3) of the security element (2) is located on the surface of the sheet and the complementary portion (4) of the security element is located within said sheet. The security element (2) comprises at least one light-reflecting or light-diffracting surface. The sheet may be used as banknote paper.

Description

FEUILLE DE SECURITE COMPORTANT DES ELEMENTS DE SECURITE EVITANT LA REPRODUCTION, RECONNAISSABLE EN LUMIERE TRANSMISE ET REFLECHIE ET SON PROCEDE DE FABRICATIONSAFETY SHEET COMPRISING REPRODUCTIVE-PROTECTIVE ELEMENTS, RECOGNIZABLE IN TRANSMITTED AND REFLECTED LIGHT, AND MANUFACTURING METHOD THEREOF
H est connu dans des documents de sécurité tels que papiers pour billets de banque, chèques, passeports, d'introduire des éléments de sécurité. Ces éléments de sécurité peuvent être des fils de sécurité qui sont des petites bandes de matière plastique, de métal qui sont incorporées dans la feuille de papier au cours de sa fabrication. Ces fils sont identifiables en lumière transmise.It is known in security documents such as bank note papers, checks, passports, to introduce security elements. These security elements can be security wires which are small strips of plastic material, of metal which are incorporated into the sheet of paper during its manufacture. These wires are identifiable in transmitted light.
On a décrit dans les documents EP-A-59056 et EP-A-229645 des procédés pour incorporer un fil de sécurité dans le papier de façon qu'il sorte en certains endroits de la masse du papier. Ces procédés sont intéressants lorsque le fil possède des propriétés de réflexion métallique et est donc brillant. De tels fils réfléchissants ne peuvent être reproduits par photocopie. A la place de la surface réfléchissante du fil, il apparaît seulement une tache sombre, ce qui permet de distinguer l'original de la copie.There have been described in EP-A-59056 and EP-A-229645 methods for incorporating a security thread into the paper so that it exits in certain places from the mass of the paper. These methods are advantageous when the wire has metallic reflection properties and is therefore shiny. Such reflective threads cannot be reproduced by photocopying. Instead of the reflective surface of the wire, only a dark spot appears, which helps to distinguish the original from the copy.
Cependant, il est possible de produire ultérieurement une surface réfléchissante sur la copie par application d'un vernis métallique.However, it is possible to subsequently produce a reflective surface on the copy by applying a metallic varnish.
On a décrit dans le document EP-A-377167 des papiers de sécurité comportant des fils de sécurité situés au moins en un point de la surface du papier, comportant des structures déviant la lumière, par exemple des hologrammes.EP-A-377167 describes security papers comprising security wires located at least at one point on the surface of the paper, comprising structures deflecting light, for example holograms.
On a décrit dans le document US-4437935 un support soluble dans l'eau comprenant des éléments dichroïques. Lorsque ce support est introduit lors de la fabrication du papier, seuls les éléments dichroïques restent, le support se solubilisant. Les éléments dichroïques sont à l'intérieur du papier.Document US-4437935 describes a water-soluble support comprising dichroic elements. When this support is introduced during the manufacture of the paper, only the dichroic elements remain, the support dissolving. The dichroic elements are inside the paper.
Ainsi, il est connu dans la technique antérieure de réaliser du papier de sécurité comportant des ouvertures par lesquelles sont visibles en réflexion des éléments de sécurité. Ces éléments de sécurité peuvent être visibles en transmission sous la forme d'un trait longitudinal sombre.Thus, it is known in the prior art to produce security paper having openings through which security elements are visible in reflection. These elements may be visible in transmission as a dark longitudinal line.
Or, comme on l'a mentionné plus haut, lorsqu'on effectue la photocopie d'un tel papier de sécurité, on peut reproduire par un trait sombre le fil et on peut reproduire par un vernis une surface réfléchissante ou fluorescente.However, as mentioned above, when a photocopy of such security paper is made, the wire can be reproduced with a dark line and a reflective or fluorescent surface can be reproduced by a varnish.
L'invention vise à fournir un document de sécurité évitant les inconvénients mentionnés ci- dessus.The invention aims to provide a security document avoiding the drawbacks mentioned above.
L'invention concerne donc une feuille de sécurité comportant au moins un élément de sécurité discontinu situé en un point de la surface de la feuille, caractérisée par le fait qu'une partie de l'élément de sécurité est située à la surface de la feuille et que la partie complémentaire de l'élément de sécurité est située à l'intérieur de la feuille.The invention therefore relates to a security sheet comprising at least one discontinuous security element located at a point on the surface of the sheet, characterized in that a part of the security element is located on the surface of the sheet. and that the complementary part of the security element is located inside the sheet.
Ainsi, en lumière réfléchie, on voit un élément de sécurité ayant une certaine forme et en lumière transmise, l'élément de sécurité qui est visible a une forme différente.Thus, in reflected light, we see a security element having a certain shape and in transmitted light, the security element which is visible has a different form.
L'élément de sécurité peut par exemple comporter au moins une surface métallique réfléchissante, ou une surface diffractant la lumière ou une surface iridescente, ou dichroïque ou peut comporter un hologramme ou un revêtement opaque de cristaux liquides.The security element may for example comprise at least one reflecting metallic surface, or a light-diffracting surface or an iridescent, or dichroic surface, or may comprise a hologram or an opaque coating of liquid crystals.
La feuille est telle qu'elle comporte sur une face au moins une fenêtre dont la surface totale est inférieure à la surface totale de l'élément de sécurité.The sheet is such that it has on one side at least one window whose total area is less than the total area of the security element.
Le procédé de fabrication d'un document de sécurité selon l'invention est tel que l'on introduit lors de la fabrication de la feuille par voie papetière un fil de sécurité constitué d'un ruban portant des marques visibles en lumière réfléchie, par exemple des marques métalliques, iridescentes, dichroïques, des hologrammes, des marques constituées de revêtements de cristaux liquides.The process for manufacturing a security document according to the invention is such that a security thread consisting of a ribbon bearing visible marks in reflected light is introduced during the papermaking process, for example metallic, iridescent, dichroic marks, holograms, marks made of liquid crystal coatings.
Le ruban peut être soluble dans l'eau. Par exemple, il peut être en alcool polyvinylique (PVA) ou plus généralement c'est un ester soluble dans l'eau. Le ruban peut aussi être une bande support fabriquée au préalable de façon à être intégrée et invisible dans la feuille finie. Cette bande peut être obtenue par voie papetière à partir d'une composition fibreuse de fibres de cellulose et de fibres d'ester soluble dans l'eau, par exemple du PVA.The tape can be water soluble. For example, it can be polyvinyl alcohol (PVA) or more generally it is a water-soluble ester. The tape can also be a tape support made beforehand so as to be integrated and invisible in the finished sheet. This strip can be obtained by papermaking from a fibrous composition of cellulose fibers and water-soluble ester fibers, for example PVA.
Le ruban est ensuite introduit lors de la fabrication de la feuille de sécurité, de façon que les marques apparaissent en surface du papier, mais seulement pour une partie, la partie complémentaire de la marque étant à l'intérieur du papier. On peut par exemple introduire le ruban selon les procédés décrits dans les documents EP-A-59056 et EP-A-70172 ou on forme un bi-jet comportant des épaisseurs inférieures aux endroits où apparaîtront les marques, comme dans le document EP-A-229645.The ribbon is then introduced during the manufacture of the security sheet, so that the marks appear on the surface of the paper, but only for part, the complementary part of the mark being inside the paper. One can for example introduce the ribbon according to the methods described in documents EP-A-59056 and EP-A-70172 or a bi-jet is formed comprising thicknesses less than at the places where the marks will appear, as in document EP-A -229645.
Lors de la réalisation de ces procédés, on réalisera des fenêtres dans le papier de façon que ces fenêtres aient une superficie inférieure à la superficie des marques réalisées sur le ruban.When carrying out these methods, windows will be made in the paper so that these windows have an area less than the area of the marks made on the ribbon.
La description suivante, en regard des dessins annexés à titre d'exemples non limitatifs permettra de comprendre comment l'invention peut être mise en pratique.The following description, with reference to the accompanying drawings by way of nonlimiting examples, will make it possible to understand how the invention can be put into practice.
La figure 1 est une vue de dessus d'une feuille de sécurité selon l'invention, cette feuille étant vue en lumière transmise.Figure 1 is a top view of a security sheet according to the invention, this sheet being seen in transmitted light.
La figure 2 est une vue de dessus d'une feuille selon la figure 1, la feuille étant vue en lumière réfléchie.Figure 2 is a top view of a sheet according to Figure 1, the sheet being viewed in reflected light.
La figure 3 est une vue en coupe d'une feuille selon l'invention.Figure 3 is a sectional view of a sheet according to the invention.
La figure 4 est une vue en plan d'un ruban utilisé pour réaliser la feuille selon l'invention.Figure 4 is a plan view of a ribbon used to make the sheet according to the invention.
La figure 5 est une vue d'une machine à papier forme ronde pour réaliser le procédé selon l'invention.FIG. 5 is a view of a round-shaped paper machine for carrying out the method according to the invention.
Sur la figure 1, on a représenté une feuille de sécurité 1 selon l'invention. La feuille 1 comporte au moins un élément de sécurité 2 discontinu situé en un point de la surface S de la feuille. L'élément de sécurité 2 est situé en partie à la surface de la feuille 1. Sur les figures 1 et 2, la partie 3 de l'élément située en surface de la feuille est un rectangle. La partie complémentaire 4 de l'élément 2 qui est située à l'intérieur de la feuille est la partie 4 formée par la surface totale de l'élément de sécurité moins la partie 3.In Figure 1, there is shown a security sheet 1 according to the invention. The sheet 1 comprises at least one discontinuous security element 2 located at a point on the surface S of the sheet. The security element 2 is located partly on the surface of the sheet 1. In FIGS. 1 and 2, the part 3 of the element situated on the surface of the sheet is a rectangle. The complementary part 4 of the element 2 which is located inside the sheet is the part 4 formed by the total surface of the security element minus the part 3.
L'élément de sécurité 2 a une forme étoilée sur la figure 1. Lorsque la feuille 1 est vue en lumière réfléchie, on ne voit que le rectangle et lorsque la feuille est vue en lumière transmise, à savoir lorsque la feuille est vue en transparence, on voit l'élément de sécurité 2 dans son ensemble, c'est-à-dire sous la forme étoilée.The security element 2 has a star shape in FIG. 1. When the sheet 1 is seen in reflected light, only the rectangle is seen and when the sheet is seen in transmitted light, namely when the sheet is seen in transparency , we see the security element 2 as a whole, that is to say in the star form.
De préférence, l'élément de sécurité est une impression métallique ou un hologramme, ou une couche irisée ou un élément dichroïque.Preferably, the security element is a metallic print or a hologram, or an iridescent layer or a dichroic element.
Ainsi, lorsqu'un contrefacteur voudra photocopier la feuille de sécurité 1, il apparaîtra une zone grise à la place du rectangle.Thus, when an infringer wants to photocopy security sheet 1, a gray area will appear in place of the rectangle.
Si le contrefacteur arrive à déposer un vernis métallique ou irisé ou autre dans le rectangle, il lui sera encore plus difficile de reproduire la partie 4 complémentaire de l'élément 2, cette partie se trouvant à l'intérieur de la feuille.If the counterfeiter manages to deposit a metallic or iridescent or other varnish in the rectangle, it will be even more difficult for him to reproduce the complementary part 4 of the element 2, this part being inside the sheet.
Sur la figure 3, on voit que la longueur totale L de l'élément de sécurité 2 est inférieure à la longueur 1 de la fenêtre 5 réalisée dans la feuille 1.In FIG. 3, it can be seen that the total length L of the security element 2 is less than the length 1 of the window 5 produced in the sheet 1.
Le ruban 6 représenté sur la figure 4 est un ruban qui peut être soluble dans l'eau, par exemple un ester et plus particulièrement un alcool polyvinylique.The ribbon 6 shown in FIG. 4 is a ribbon which can be soluble in water, for example an ester and more particularly a polyvinyl alcohol.
Le ruban 6 peut aussi être un ruban obtenu par voie papetière à l'aide d'un mélange de fibres de cellulose et de matière soluble dans l'eau, tel que le PVA, les quantités respectives de fibres de cellulose et de PVA étant réglées par l'homme du métier de façon que lorsque le ruban 6 est introduit dans la feuille 1, ce ruban est invisible. On dépose sur le ruban 6 des marques 7 qui sont obtenues par dépôt sur toute la surface du ruban d'un métal tel que l'aluminium, et impression d'un vernis insoluble à la soude, cette impression correspondant aux marques 7 que l'on souhaite réaliser. Puis on enlève l'aluminium non protégé à l'aide de la soude. On peut aussi imprimer les marques 7 à l'aide d'une encre métallique ou un vernis contenant des pigments iridescents. On peut aussi déposer et solidariser des éléments dichroïques. On peut aussi réaliser les marques 7 sous forme d'hologrammes. Les marques 7 peuvent aussi être imprimées à l'aide d'une encre fluorescente. Enfin, on peut réaliser les marques 7 sous forme de codes à barres pour impression de traits métalliques ou traits magnétiques/métalliques.The ribbon 6 can also be a ribbon obtained by the papermaking process using a mixture of cellulose fibers and water-soluble material, such as PVA, the respective amounts of cellulose fibers and PVA being regulated. by a person skilled in the art so that when the ribbon 6 is introduced into the sheet 1, this ribbon is invisible. Marks 7 are deposited on the ribbon 6 which are obtained by depositing a metal such as aluminum over the entire surface of the ribbon, and printing a varnish insoluble in soda, this impression corresponding to marks 7 which we want to achieve. Then remove the unprotected aluminum using sodium hydroxide. It is also possible to print the marks 7 using a metallic ink or a varnish containing iridescent pigments. We can also deposit and secure dichroic elements. You can also make marks 7 in the form of holograms. Marks 7 can also be printed using fluorescent ink. Finally, the marks 7 can be produced in the form of bar codes for printing metallic lines or magnetic / metallic lines.
Le procédé d'introduction du fil peut se faire comme représenté sur la figure 5. Une machine à papier forme ronde comprend une suspension aqueuse 8 de fibres de cellulose, des liants et éventuellement d'autres composés habituellement utilisés pour former une feuille de papier.The process for introducing the wire can be carried out as shown in FIG. 5. A round-shaped paper machine comprises an aqueous suspension 8 of cellulose fibers, binders and possibly other compounds usually used to form a sheet of paper.
Une forme ronde 9 est constituée d'une grille sous forme de cylindre. La composition est déposée sur la grille lorsqu'elle tourne dans le sens de la flèche FI. La feuille 1 se forme sur le cylindre et est tirée par le rouleau 10 et est transférée sur un feutre 11 pour être ensuite séchée.A round shape 9 consists of a grid in the form of a cylinder. The composition is deposited on the grid when it rotates in the direction of the arrow FI. The sheet 1 forms on the cylinder and is pulled by the roller 10 and is transferred to a felt 11 to be then dried.
On introduit un ruban 6 qui est guidé par un rouleau 12 de façon à ce que les fibres ne^ se déposent pas sur une certaine longueur 1 pour former les fenêtres 5. Le ruban 6 comporte des marques 7. On règle la distance d entre les marques consécutives 7, ainsi que la distance entre les fenêtres 5 par repérage du ruban 6 par rapport à la feuille 1 et par les vitesses de défilement du ruban 6 et de la feuille 1. Les fenêtres sont réalisées par des embossages effectués sur la grille de la forme ronde 9. Ces fenêtres 5 sont en fait des filigranes. La forme des embossages (non représentés sur la figure 5) est fonction de la forme souhaitée des fenêtres.Introducing a strip 6 which is guided by a roller 12 so that the fibers do not deposit ^ over a certain length 1 for forming the windows 5. The strip 6 has markings 7. adjusts the distance d between the consecutive marks 7, as well as the distance between the windows 5 by locating the tape 6 relative to the sheet 1 and by the running speeds of the tape 6 and the sheet 1. The windows are produced by embossing carried out on the grid the round shape 9. These windows 5 are in fact watermarks. The shape of the embossings (not shown in Figure 5) depends on the desired shape of the windows.
Bien entendu, la feuille selon l'invention peut être réalisée par un procédé double jet. Exemple 1Of course, the sheet according to the invention can be produced by a double jet process. Example 1
On réalise une feuille par voie papetière à partir d'une composition fibreuse contenant 40 parts de fibres de cellulose raffinées à 45 degrés Schopper et 60 parts de fibres de PVA et éventuellement des adjuvants classiques utilisés en papeterie.A sheet is produced by the papermaking process from a fibrous composition containing 40 parts of cellulose fibers refined at 45 degrees Schopper and 60 parts of PVA fibers and optionally conventional adjuvants used in stationery.
La feuille est séchée à une température inférieure à celle de thermosolubilisation de fibres de PVA utilisées, soit à une température inférieure à 60°C.The sheet is dried at a temperature below that of thermosolubilization of PVA fibers used, that is to say at a temperature below 60 ° C.
Sur la feuille ainsi obtenue, on dépose des marques sous forme d'hologrammes. On découpe la feuille en ruban de 3cm de largeur et on bobine le ruban.On the sheet thus obtained, marks are deposited in the form of holograms. We cut the sheet into 3cm wide ribbon and reel the ribbon.
Sur une machine à papier forme ronde, dont la toile est embossée pour former des fenêtres rectangulaires dans le papier, on introduit le ruban comme on l'a décrit pour la figure 5.On a round-shaped paper machine, the canvas of which is embossed to form rectangular windows in the paper, the ribbon is introduced as described for FIG. 5.
La taille des fenêtres est réglée au moyen de l'embossage de façon à être inférieure à la taille des marques. De même la distance entre les fenêtres est réglée de façon que les marques coïncident avec les fenêtres. Les vitesses de la forme ronde et du déroulement du ruban sont de même réglées pour faire coïncider les fenêtres et les marques.The size of the windows is adjusted by means of the embossing so as to be smaller than the size of the marks. Similarly, the distance between the windows is adjusted so that the marks coincide with the windows. The speeds of the round shape and the unwinding of the ribbon are also adjusted to make the windows and the marks coincide.
La dissolution des fibres de PVA entraîne une transparentisation de la feuille de papier mais cette transparentisation est compensée par les fibres de cellulose du ruban.The dissolution of the PVA fibers leads to a transparency of the paper sheet, but this transparency is compensated for by the cellulose fibers of the ribbon.
On obtient ainsi une feuille de papier comportant des fenêtres par lesquelles on peut voir à l'oeil nu les hologrammes et ce par réflexion.A sheet of paper is thus obtained comprising windows through which the holograms can be seen with the naked eye and this by reflection.
Si on regarde la feuille par transparence, les marques apparaîtront comme ayant une forme distincte de la forme des fenêtres. Le ruban supportant les marques n'apparaîtra pas en transparence.If we look at the sheet by transparency, the marks will appear to have a shape distinct from the shape of the windows. The ribbon supporting the marks will not appear in transparency.
Une telle feuille n'est pas reproductible par photocopie et en outre elle est reconnaissable à l'oeil nu par l'utilisateur. Exemple 2Such a sheet is not reproducible by photocopying and moreover it is recognizable to the naked eye by the user. Example 2
Sur une feuille de matière plastique transparent, à savoir du polyester, on dépose sous vide une couche d'aluminium. On imprime des marques sur l'aluminium au moyen d'un vernis résistant à la soude. On dissout l'aluminium non protégé à l'aide d'une solution de soude.On a sheet of transparent plastic, namely polyester, a layer of aluminum is deposited under vacuum. Marks are printed on aluminum using a soda-resistant varnish. The unprotected aluminum is dissolved using a sodium hydroxide solution.
On découpe la feuille sous forme de ruban que l'on introduit entre deux jets de papier humide dont l'une possède des fenêtres obtenues par embossage de la toile de la forme ronde. On presse ensuite les deux jets de papier et on sèche. Comme dans l'exemple 1, en réglant les dimensions des fenêtres et des marques, leurs distances respectives et les vitesses respectives des jets et du ruban, on obtient une feuille finie qui comporte des fenêtres par lesquelles on peut voir à l'oeil nu par réflexion la surface réfléchissante d'aluminium et par transparence des marques de forme différente de la forme des fenêtres. The sheet is cut in the form of a ribbon which is introduced between two jets of wet paper, one of which has windows obtained by embossing the canvas of the round shape. The two jets of paper are then pressed and dried. As in Example 1, by adjusting the dimensions of the windows and of the marks, their respective distances and the respective speeds of the jets and of the ribbon, a finished sheet is obtained which comprises windows through which one can see with the naked eye by reflection the reflective surface of aluminum and by transparency marks different in shape from the shape of the windows.

Claims

REVENDICATIONS
1. Feuille de sécurité comportant au moins un élément de sécurité (2) discontinu situé en un point de la surface (S) de la feuille, caractérisée par le fait qu'une partie (3) de l'élément de sécurité (2) est située à la surface de la feuille et que la partie complémentaire (4) de l'élément de sécurité est située à l'intérieur de la feuille.1. Security sheet comprising at least one discontinuous security element (2) located at a point on the surface (S) of the sheet, characterized in that a part (3) of the security element (2) is located on the surface of the sheet and that the complementary part (4) of the security element is located inside the sheet.
2. Feuille selon la revendication 1, caractérisée par le fait que l'élément de sécurité (2) comporte au moins une surface réfléchissant ou diffractant la lumière.2. Sheet according to claim 1, characterized in that the security element (2) comprises at least one surface reflecting or diffracting light.
3. Feuille selon la revendication 2, caractérisée par le fait que l'élément de sécurité (2) comporte au moins une surface métallique, iridescente, dichroïque, un hologramme.3. Sheet according to claim 2, characterized in that the security element (2) comprises at least one metallic surface, iridescent, dichroic, a hologram.
4. Feuille selon l'une des revendications précédentes, caractérisée par le fait qu'elle comporte sur une face au moins une fenêtre (3) dont la surface totale est inférieure à la surface totale de l'élément de sécurité (2).4. Sheet according to one of the preceding claims, characterized in that it comprises on one side at least one window (3) whose total area is less than the total area of the security element (2).
5. Feuille selon l'une des revendications 1 à 4, caractérisée par le fait que la longueur totale (L) de l'élément de sécurité (2) est inférieure à la longueur (1) de la fenêtre (5) réalisée dans la feuille (1).5. Sheet according to one of claims 1 to 4, characterized in that the total length (L) of the security element (2) is less than the length (1) of the window (5) made in the sheet (1).
6. Procédé de fabrication d'une feuille selon l'une des revendications 1 à 5, caractérisé par le fait qu'on introduit un ruban (6) lors de la fabrication de la feuille par voie papetière.6. A method of manufacturing a sheet according to one of claims 1 to 5, characterized in that a ribbon (6) is introduced during the manufacture of the sheet by the papermaking process.
7. Procédé selon la revendication 6, caractérisé par le fait que l'on obtient le ruban (6) à partir d'une feuille de matière plastique transparent sur laquelle on dépose et solidarise des éléments de sécurité (2) et on découpe la feuille en bandes.7. Method according to claim 6, characterized in that the ribbon (6) is obtained from a sheet of transparent plastic material on which security elements (2) are deposited and secured and the sheet is cut. in strips.
8. Procédé selon la revendication 6, caractérisé par le fait que l'on obtient le ruban (6) à partir d'une feuille obtenue par voie papetière à partir de fibres de cellulose et de fibres solubles dans l'eau, sur laquelle on dépose et solidarise des éléments de sécurité (2) et on découpe la feuille en bandes. 8. Method according to claim 6, characterized in that the ribbon (6) is obtained from a sheet obtained by the papermaking process from cellulose fibers and water-soluble fibers, on which removing and securing the security elements (2) and cutting the sheet into strips.
9. Procédé selon la revendication 6, caractérisé par le fait que l'on obtient le ruban (6) à partir d'une feuille soluble dans l'eau sur laquelle on dépose et solidarise des éléments de sécurité (2) et on découpe la feuille en bandes.9. Method according to claim 6, characterized in that the ribbon (6) is obtained from a water-soluble sheet on which security elements (2) are deposited and secured and the leaf in strips.
10. Procédé selon l'une des revendications 6 à 9, caractérisé par le fait qu'on règle la vitesse de fabrication de la feuille de sécurité, la vitesse d'introduction du ruban (6) pour que les fenêtres (3) se superposent aux éléments de sécurité (2). 10. Method according to one of claims 6 to 9, characterized in that the speed of manufacture of the security sheet is adjusted, the speed of introduction of the tape (6) so that the windows (3) are superimposed security elements (2).
PCT/FR1994/000226 1993-03-02 1994-03-01 Security sheet comprising security elements for preventing duplication, and being recognisable in transmitted and reflected light, and method for making same WO1994020683A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE69410241T DE69410241T2 (en) 1993-03-02 1994-03-01 SAFE SAFETY SHEET RECOGNIZED BY TRANSLUCTION AND TRANSMITTER WITH SAFETY ELEMENTS TO PREVENT REPRODUCTION AND METHOD FOR THE PRODUCTION THEREOF
EP94908389A EP0687326B1 (en) 1993-03-02 1994-03-01 Security sheet comprising security elements for preventing duplication, and being recognisable in transmitted and reflected light, and method for making same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9302372A FR2702228B1 (en) 1993-03-02 1993-03-02 Safety sheet comprising safety elements preventing reproduction, recognizable by transmitted and reflected light and its manufacturing process.
FR93/02372 1993-03-02

Publications (1)

Publication Number Publication Date
WO1994020683A1 true WO1994020683A1 (en) 1994-09-15

Family

ID=9444566

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1994/000226 WO1994020683A1 (en) 1993-03-02 1994-03-01 Security sheet comprising security elements for preventing duplication, and being recognisable in transmitted and reflected light, and method for making same

Country Status (6)

Country Link
EP (1) EP0687326B1 (en)
DE (1) DE69410241T2 (en)
ES (1) ES2119175T3 (en)
FR (1) FR2702228B1 (en)
SI (1) SI9420011A (en)
WO (1) WO1994020683A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6199911B1 (en) 1997-04-03 2001-03-13 De La Rue International Limited Security element for security paper
US7632380B2 (en) * 2002-05-22 2009-12-15 Arjowiggins Security Article formed from at least a fibrous material jet comprising at least a null thickness zone and method for making same
US20110056638A1 (en) * 2008-04-11 2011-03-10 Arjowiggins Security method of fabricating a sheet comprising a region of reduced thickness or of increased thickness in register with a ribbon, and an associated sheet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2853970B1 (en) * 2003-04-18 2005-10-21 Arjo Wiggins TRANSLUCENT MULTILAYER MEDIUM HAVING A VISIBLE PATTERN IN REFLECTION AND NOT IN TRANSPARENCY

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0059056A1 (en) * 1981-02-19 1982-09-01 Portals Limited Method for making a fibrous sheet
EP0070172A1 (en) * 1981-07-13 1983-01-19 Portals Limited Paper incorporating a partially embedded strip, methods for making paper and security documents
GB2103669A (en) * 1981-06-03 1983-02-23 Crane Co Identifiable papers for example banknoted and methods and apparatus for producing them
EP0400902A2 (en) * 1989-06-02 1990-12-05 Portals Limited Security paper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0059056A1 (en) * 1981-02-19 1982-09-01 Portals Limited Method for making a fibrous sheet
GB2103669A (en) * 1981-06-03 1983-02-23 Crane Co Identifiable papers for example banknoted and methods and apparatus for producing them
US4437935A (en) * 1981-06-03 1984-03-20 Crane And Company Method and apparatus for providing security features in paper
EP0070172A1 (en) * 1981-07-13 1983-01-19 Portals Limited Paper incorporating a partially embedded strip, methods for making paper and security documents
EP0400902A2 (en) * 1989-06-02 1990-12-05 Portals Limited Security paper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6199911B1 (en) 1997-04-03 2001-03-13 De La Rue International Limited Security element for security paper
US7632380B2 (en) * 2002-05-22 2009-12-15 Arjowiggins Security Article formed from at least a fibrous material jet comprising at least a null thickness zone and method for making same
US20110056638A1 (en) * 2008-04-11 2011-03-10 Arjowiggins Security method of fabricating a sheet comprising a region of reduced thickness or of increased thickness in register with a ribbon, and an associated sheet

Also Published As

Publication number Publication date
EP0687326B1 (en) 1998-05-13
FR2702228A1 (en) 1994-09-09
DE69410241D1 (en) 1998-06-18
DE69410241T2 (en) 1999-02-11
SI9420011A (en) 1996-02-29
ES2119175T3 (en) 1998-10-01
FR2702228B1 (en) 1995-04-14
EP0687326A1 (en) 1995-12-20

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