EP1831461B1 - Security structure and article incorporating such a structure - Google Patents

Security structure and article incorporating such a structure Download PDF

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Publication number
EP1831461B1
EP1831461B1 EP05815536A EP05815536A EP1831461B1 EP 1831461 B1 EP1831461 B1 EP 1831461B1 EP 05815536 A EP05815536 A EP 05815536A EP 05815536 A EP05815536 A EP 05815536A EP 1831461 B1 EP1831461 B1 EP 1831461B1
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EP
European Patent Office
Prior art keywords
fluorescent
article
zones
zone
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.)
Active
Application number
EP05815536A
Other languages
German (de)
French (fr)
Other versions
EP1831461A2 (en
Inventor
Nathalie Vast
Stéphane Mallol
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.)
ArjoWiggins Security SAS
Original Assignee
ArjoWiggins Security SAS
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 ArjoWiggins Security SAS filed Critical ArjoWiggins Security SAS
Priority to PL05815536T priority Critical patent/PL1831461T3/en
Priority to SI200531405T priority patent/SI1831461T1/en
Publication of EP1831461A2 publication Critical patent/EP1831461A2/en
Application granted granted Critical
Publication of EP1831461B1 publication Critical patent/EP1831461B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • 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
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/373—Metallic materials
    • 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
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the present invention particularly relates to a security structure and an article incorporating such a structure.
  • the present invention aims in particular to meet this need.
  • the color of the structure may vary from one face to the other, the structure appearing for example at least partially in blue on one side and at least partially in yellow on the other.
  • Authentication and / or identification of an article comprising such a structure can thus use two observation steps from respectively two opposite faces of the article, which reinforces the protection of the article against forgery.
  • the invention makes it possible, because of the presence of fluorescent zones of different colors, to create new optical effects.
  • the predefined lighting condition may correspond to ultraviolet illumination, in particular of near-visible wavelength, for example around 365 nm.
  • the predefined lighting condition corresponds to infrared illumination.
  • At least one of the first and second fluorescent zones are at least partially non-opaque, at least in the predefined lighting condition.
  • At least one of the first and second fluorescent zones are, in addition, substantially colorless in color.
  • White light is, in particular both.
  • the first and second fluorescent zones are superimposed at least partially so that, in the predefined lighting condition, a light passing successively through the two fluorescent zones has a third color, different from the first and second colors.
  • the authentication and / or identification of an article or document incorporating such a structure may comprise, in addition to two observation steps, in the predefined lighting condition, in reflection, first and second colors, at least one observation step in transmitted light to observe the third color.
  • the first and second fluorescent zones have absorption spectra chosen so that, in the predefined lighting condition, their superposition appears in transmitted light of a third or fourth color, each different from the first ones. and second colors, according to the order of the fluorescent zones traversed by the incident light.
  • the difference ⁇ E between the third and fourth colors, in the CIEL * C * h 1976 color space, may be at least 2, especially at least 5, which makes it easily observable.
  • Authentication and / or identification of an article or document can thus pass through the detection of four different colors, which further enhances security.
  • the first fluorescent zone appears yellow and the second blue fluorescent zone, and, observed in transmitted light, the structure has a violet color when it is observed from a first face and appears substantially white when it is observed from a second side, opposite to the first.
  • the colors and their number may be different from those described above.
  • the first and second fluorescent zones have absorption spectra chosen so that, in the predefined lighting condition, the superposition of the two fluorescent zones appears in transmitted light of substantially the same color, whatever the observation side.
  • the structure comprises at least a third fluorescent zone having a color different from the first fluorescent zone and observable on the same face, in the predefined lighting condition.
  • the structure When the order of superposition of the fluorescent zones is not without effect on the result produced during the observation in transmitted light, it is possible to observe on each side of the structure, in transmitted light, in the predefined lighting condition, an alternation of fluorescent zones appearing respectively of the third and fourth colors.
  • the structure whatever the face that is observed, the structure generally has the same appearance in the predefined lighting condition, which can facilitate authentication and / or identification.
  • the third fluorescent zone is adjacent to the first zone, respectively the second zone, these zones overlapping preferably substantially exactly.
  • the structure is advantageously non-opaque in a junction region of the first and third fluorescent zones, respectively of the second and fourth fluorescent zones.
  • Such a structure provides enhanced tamperproofing insofar as a defect in the arrangement of the fluorescent zones can be detected relatively easily. Indeed, when the fluorescent zones of the opposite faces of the structure are superimposed exactly, an observation of the structure by transparency, in the predefined lighting condition, reveals only one or two colors. On the other hand, when fluorescent zones of the opposite faces are not superimposed exactly and overflow on neighboring fluorescent zones, other colors are revealed.
  • the structure has at least one face, in particular two opposite fully fluorescent faces.
  • the structure has at least one face, in particular two opposite faces, not entirely fluorescent (s), for example with fluorescent zones alternating with non-fluorescent areas.
  • the structure comprises a support at least partially, in particular entirely, transparent or translucent, and carrying the fluorescent zones.
  • the support may be flexible, being in particular made of plastic, for example polyester.
  • At least one of the fluorescent zones may be formed by depositing a fluorescent composition on one side of the support.
  • the structure for example the support, comprises at least first and second adjacent portions, the first portion having an ability to oppose the passage of light, under a given light, greater than that of the second portion.
  • the first portion may be substantially opaque and / or reflective at least in the predefined lighting condition, for example under UV illumination and / or at least in ambient lighting.
  • the second portion may be substantially transparent and / or translucent at least in the predefined lighting condition, for example under UV illumination and / or at least in ambient lighting.
  • the aforesaid second portion is superimposed at least partially with at least one fluorescent zone or, where appropriate, with the superposition of two fluorescent zones, so that, in the predefined lighting condition, in transmitted light, the second portion appears with a color corresponding to the fluorescent zone or the superposition of the fluorescent zones.
  • the second portion has a shape chosen to define a pattern, which appears, in transmitted light, brighter than adjacent regions of the structure.
  • the second portion may, where appropriate, be entirely surrounded by the first.
  • the first portion has a shape chosen to define a pattern, which appears, in transmitted light, darker than adjacent regions of the structure.
  • the first portion may, where appropriate, be entirely surrounded by the second.
  • the pattern can be chosen from one of the following elements: a letter, a drawing, a symbol, a logo, this list not being limiting.
  • the aforementioned first portion is formed by a metal layer, in particular a metal deposit, and the second aforementioned portion by a demetallization of this layer.
  • the structure comprises a negative or positive printing of an ink, the first portion comprising the ink and the second portion being devoid of it.
  • the aforesaid second portion and the fluorescent zone at least partially covering it are non-opaque in white light so as to allow the observation, in ambient light, by transparency, of patterns present on the structure, thus providing additional security.
  • the second portion extends over a junction region between adjacent first and third adjacent fluorescent zones, respectively second and fourth adjacent fluorescent zones.
  • the first portion opaque and / or reflective above may optionally comprise a composition containing or not fluorescent pigments or dyes.
  • the aforementioned first and second portions form a plurality of patterns or groups of patterns repeating, regularly or randomly, in a predetermined direction.
  • the structure can be in various forms, for example strip, and constitute for example a security thread.
  • the structure may have a width for example greater than 0.7 mm and preferably less than 60 mm, in particular between 1 mm and 40 mm.
  • the structure is arranged to be fully incorporated in or on the security article and / or value.
  • the structure comprises a support forming a carrier strip arranged to be separated from at least one fluorescent layer after application of the structure to an article, in particular a security and / or value document, the structure possibly comprising, where appropriate between the support and the fluorescent layer, at least one release layer.
  • the structure may constitute for example a security patch.
  • the invention further relates, in another of its aspects, an article, for example a security document and / or value, comprising a security structure as mentioned above.
  • the structure may be at least partially embedded in a layer of the article, and may comprise for example alternately zones embedded in a layer of the article and exposed portions.
  • the structure may alternatively come flush with one face of the article or be entirely embedded therein.
  • the article may comprise, in contact with the structure, at least one fibrous layer, for example containing paper fibers, in particular cellulose fibers and / or fibers of synthetic nature.
  • the article may comprise, in contact with the structure, at least one non-fibrous layer, for example plastic.
  • the security structure extends from a first edge of the article to a second edge, opposite the first.
  • the article may be intended to receive an impression, in particular to form a document.
  • the item may be one of the following: a bank note, security paper, passport slip or cover, visa, coupon, valuable document other than a bank note for example a check or a credit card, a protection and / or authentication label, a traceability label, an optical disc, a ticket.
  • the article preferably comprises a region of sufficiently transparent and / or translucent fluorescent zones so that at least a portion of the fluorescent zones is visible through said region when the article is observed, by transparency.
  • the aforementioned region may correspond, for example, to an opening in the article or to at least one layer of a transparent and / or translucent material.
  • FIG. 1 We have shown on the figure 1 an article 1, for example a bank note, comprising a fibrous layer 2, in which is incorporated a security structure 3 according to the invention.
  • Section 1 may still be a security paper, a passport slip or cover, a visa, a coupon, a document of value other than a ticket bank, for example a check or a credit card, a protection and / or authentication label, a traceability label or an optical disc.
  • Article 1 may be constituted by the structure itself, if necessary, for example in the case of a plastic banknote.
  • the structure 3 is in the form of a longitudinal axis strip X, with a width smaller than that of the article 1, for example being about 15 mm or less.
  • Structure 3 can be completely embedded in Article 1, as can be seen in figure 14 .
  • the structure 3 comes flush with a face 4 thereof.
  • the structure 3 is partially embedded in the fibrous layer 2, so as to present alternately embedded and uncovered portions.
  • the fibrous layer 2 may include recesses 5 leaving portions of the structure 3 discovered.
  • the fibrous layer 2 may comprise, if appropriate, bosses 7, shown in dotted lines on the figure 16 , located between the recesses 5.
  • Article 1 may have, where appropriate, openings facilitating observation in transmitted light.
  • the structure 3 comprises for example a support 10 made of transparent plastic, in particular polyester, as illustrated in FIG. figure 2 .
  • the structure 3 comprises a first portion 13 substantially opaque and / or reflective surrounding second portions 12 substantially transparent.
  • the second portions 12 form groups of patterns 11 such as texts, as illustrated in FIGS. Figures 6 and 7 , repeating in the longitudinal direction of structure 3.
  • the patterns may alternatively represent a drawing, a symbol or a logo.
  • the first portion 13 may be formed by a metal deposit and the portions 12 by a demetallization of this deposit.
  • the first portion 13 is formed by a deposit of an ink obtained by negative printing and the second portions 12 correspond to the zones that are devoid of ink.
  • the portions 12 and 13 may be made on only one side of the support 10, as shown in FIG. figure 2 , or, alternatively, on two opposite sides of the support 10, as illustrated in FIG. figure 3 .
  • the support 10 with the portions 13 is covered on at least one of its faces with at least one fluorescent composition.
  • the support 10 and the portions 13 are covered by fluorescent compositions 15 and 16 appearing respectively in fluorescence of a first color C 1 and a second color C 2 , under a predefined lighting condition, for example under UV illumination , in particular of wavelength close to 365 nm.
  • the fluorescent compositions 15 and 16 have absorption spectra chosen so that, in the predefined lighting condition, their superposition appears from a third color C 3 or a fourth color C 4 , different first and second colors C 1 and C 2 , according to the order of the fluorescent compositions traversed by the incident light.
  • the fluorescent compositions 15 and 16 are, for example, those marketed by HONEYWELL.
  • compositions 15 and 16 are non-opaque, so that the second portions 12 can be observed in daylight, by transparency.
  • the structure 3 When the article 1 is observed from the face 18 of the structure 3, in the predefined lighting condition, in reflection, the structure 3 appears with the first color C 1 , as illustrated in FIG. figure 4 .
  • the structure 3 appears with the second color C 2 , as shown in FIG. figure 5 .
  • the portions 12 appear with the third color C 3 , as can be seen in FIG. figure 6 , and an observation by transparency from the other face 19 reveals the portions 12 with the fourth color C 4 , as illustrated in FIG. figure 7 .
  • the authentication and / or the identification of the article 1 can go through the observation of four different colors.
  • the structure 3 has on each face 18 or 19 a single color, in the predefined lighting condition.
  • the security structure comprises on each face fluorescent zones of different colors.
  • FIG. 8 and 9 a structure 3 'according to the invention, having on opposite sides 20 and 23 an alternation of adjacent fluorescent zones 21 and 22, respectively 24 and 25.
  • the zones 21 and 25, respectively 22 and 24, are capable of emitting fluorescence a light of a first color C 1 , respectively of a second color C 2 , in the predefined lighting condition.
  • the fluorescent zones 21, 22, 24 and 25 have a rectangular shape.
  • these fluorescent zones may have a different shape, for example trapezoidal.
  • Each zone 21, respectively 22, is superimposed exactly with a zone 24, respectively 25, of the other face.
  • each pair of fluorescent zones 21, 24 and 22 completely covers a group of portions 12.
  • the color C 3 or C 4 produced by the observation in transmitted light of the fluorescent zones depends on the order in which the light passes through them.
  • the intermediate portions 27 each have the colors C 3 and C 4 .
  • the intermediate portion 27 would not only the two colors C 3 and C 4 , but also a portion with the color C 2 corresponding to the superposition of the zone 22 with the neighboring zone 24, which involves the falsification of the structure 3 '.
  • the intermediate portions 27 may form patterns 28, for example, patterns, revealing the junction between two adjacent fluorescent zones 21 and 22, respectively 24 and 25, as shown in FIG. figure 13 .
  • This machine comprises a tank 40 comprising a suspension 41 of fibers, for example cellulose fibers and / or cotton linters and / or synthetic and / or artificial fibers in which is partially immersed a cylinder of rotating fabric 42 defining a surface 43 in contact with which the fibrous layer 2 is formed.
  • a suspension 41 of fibers for example cellulose fibers and / or cotton linters and / or synthetic and / or artificial fibers in which is partially immersed a cylinder of rotating fabric 42 defining a surface 43 in contact with which the fibrous layer 2 is formed.
  • the formation of the structure 3 can be incorporated in the fibrous layer 2 during its formation.
  • the cylinder 42 has reliefs 44, shown in dashed lines on the figure 17 these reliefs 44 being constituted for example by bosses on the cylinder 42 or by one or more masks.
  • the optional layer of varnish 53, the first fluorescent composition 54, the layer defining the portion or portions 13 and the second fluorescent composition 55 form an assembly 60 to be transferred to a fibrous layer 2, for example on the surface thereof as illustrated on the figure 19 .
  • the assembly 60 may in particular be transferred hot to the fibrous layer 2, as illustrated in FIG. figure 20 .
  • the layer 2 and the structure 50 are then driven in displacement in the same direction by means of a machine comprising first 61 and second 62 rotating cylinders. After this passage, the support 51 and the release layer 52 are separated from the assembly 60, which remains integral with the layer 2.
  • the layer 2 has a relatively small thickness making it possible to observe, by transparency, the assembly 60 from the face of the layer 2 opposite to the assembly 60.
  • the layer 2 may for example be made of a transparent material, for example a transparent plastic material.
  • the structure according to the invention may be made otherwise than in band, for example in the form of a patch.
  • the structure according to the invention may comprise compositions having a fluorescence other than in the UV, for example in the infrared.

Landscapes

  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Burglar Alarm Systems (AREA)
  • Printing Methods (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

A security structure intended to be incorporated or fastened, at least partially, in or on an article, for example a security document and/or a document of value, includes at least one first fluorescent zone capable of emitting by fluorescence, under a predefined illumination condition, visible light of a first color; and at least one second fluorescent zone capable of emitting by fluorescence, under the predefined illumination condition, visible light of a second color that differs from the first, the first and second fluorescent zones being observable from the respective opposed faces of the structure.

Description

Structure de sécurité et article incorporant une telle structureSecurity structure and article incorporating such a structure

La présente invention a notamment pour objet une structure de sécurité et un article incorporant une telle structure.The present invention particularly relates to a security structure and an article incorporating such a structure.

On connaît WO 03/061980 , EP 0319157 , EP 1036 665 et GB 2300596 qui décrivent une structure de sécurité comportant :

  • une première zone florescente capable d'émettre pas fluorescence, dans une condition d'éclairage prédéfinie, une lumière visible d'une première couleur,
  • une deuxième zone fluorescente capable d'émettre par fluorescene, dans une condition d'éclairage prédéfinie, une lumière visible d'une deuxième couleur, les première et deuxième zones fluorescentes étant respectivement observables depuis des faces opposées de la structure.
We know WO 03/061980 , EP 0319157 , EP 1036 665 and GB 2300596 describing a security structure comprising:
  • a first florescent zone capable of emitting fluorescence, in a predefined lighting condition, a visible light of a first color,
  • a second fluorescent zone capable of fluorescently emitting, in a predefined lighting condition, a visible light of a second color, the first and second fluorescent zones being respectively observable from opposite faces of the structure.

Il existe un besoin pour améliorer encore la protection des documents de sécurité et/ou de valeur contre la falsification.There is a need to further improve the protection of security and / or value documents against forgery.

La présente invention vise notamment à répondre à ce besoin.The present invention aims in particular to meet this need.

L'invention a pour objet, selon l'un de ses aspects, une structure de sécurité destinée à être incorporée ou fixée au moins partiellement dans ou sur un article, par exemple un document de sécurité et/ou de valeur, la structure comportant :

  • au moins une première zone fluorescente capable d'émettre par fluorescence, dans une condition d'éclairage prédéfmie, une lumière visible d'une première couleur,
  • au moins une deuxième zone fluorescente capable d'émettre par fluorescence, dans la condition d'éclairage prédéfinie, une lumière visible d'une deuxième couleur, différente de la première, les première et deuxième zones fluorescentes étant respectivement observables depuis des faces opposées de la structure.
According to one of its aspects, the subject of the invention is a security structure intended to be incorporated or fixed at least partially in or on an article, for example a security and / or value document, the structure comprising:
  • at least a first fluorescent zone capable of fluorescently emitting, in a predefined lighting condition, a visible light of a first color,
  • at least one second fluorescent zone capable of fluorescently emitting, in the predefined lighting condition, a visible light of a second color, different from the first, the first and second fluorescent zones being respectively observable from opposite sides of the structure.

Ainsi, dans la condition d'éclairage prédéfinie, la couleur de la structure peut varier d'une face à l'autre, la structure apparaissant par exemple au moins partiellement en bleu sur une face et au moins partiellement en jaune sur l'autre. L'authentification et/ou l'identification d'un article comportant une telle structure peut faire ainsi appel à deux étapes d'observation depuis respectivement deux faces opposées de l'article, ce qui renforce la protection de l'article contre la falsification.Thus, in the predefined lighting condition, the color of the structure may vary from one face to the other, the structure appearing for example at least partially in blue on one side and at least partially in yellow on the other. Authentication and / or identification of an article comprising such a structure can thus use two observation steps from respectively two opposite faces of the article, which reinforces the protection of the article against forgery.

En outre, l'invention permet, du fait de la présence de zones fluorescentes de couleurs différentes, de créer de nouveaux effets optiques.In addition, the invention makes it possible, because of the presence of fluorescent zones of different colors, to create new optical effects.

La condition d'éclairage prédéfinie peut correspondre à un éclairage ultraviolet, notamment de longueur d'onde proche du visible, par exemple voisin de 365 nm. En variante, la condition d'éclairage prédéfinie correspond à un éclairage infrarouge.The predefined lighting condition may correspond to ultraviolet illumination, in particular of near-visible wavelength, for example around 365 nm. Alternatively, the predefined lighting condition corresponds to infrared illumination.

L'une au moins des première et deuxième zones fluorescentes, notamment les deux, sont au moins partiellement non opaques, au moins dans la condition d'éclairage prédéfinie.At least one of the first and second fluorescent zones, in particular both, are at least partially non-opaque, at least in the predefined lighting condition.

Dans un exemple de mise en oeuvre de l'invention, l'une au moins des première et deuxième zones fluorescentes, notamment les deux, sont, en outre, sensiblement incolores en lumière blanche.In an exemplary implementation of the invention, at least one of the first and second fluorescent zones, in particular both, are, in addition, substantially colorless in color. White light.

Les première et deuxième zones fluorescentes se superposent au moins partiellement de manière à ce que, dans la condition d'éclairage prédéfinie, une lumière traversant successivement les deux zones fluorescentes présente une troisième couleur, différente des première et deuxième couleurs.The first and second fluorescent zones are superimposed at least partially so that, in the predefined lighting condition, a light passing successively through the two fluorescent zones has a third color, different from the first and second colors.

Ainsi, l'authentification et/ou l'identification d'un article ou document incorporant une telle structure peut comprendre outre deux étapes d'observation, dans la condition d'éclairage prédéfinie, en réflexion, des première et deuxième couleurs, au moins une étape d'observation en lumière transmise pour observer la troisième couleur.Thus, the authentication and / or identification of an article or document incorporating such a structure may comprise, in addition to two observation steps, in the predefined lighting condition, in reflection, first and second colors, at least one observation step in transmitted light to observe the third color.

Avantageusement, les première et deuxième zones fluorescentes présentent des spectres d'absorption choisis de manière à ce que, dans la condition d'éclairage prédéfinie, leur superposition apparaisse en lumière transmise d'une troisième ou d'une quatrième couleur, chacune différente des première et deuxième couleurs, selon l'ordre des zones fluorescentes traversées par la lumière incidente.Advantageously, the first and second fluorescent zones have absorption spectra chosen so that, in the predefined lighting condition, their superposition appears in transmitted light of a third or fourth color, each different from the first ones. and second colors, according to the order of the fluorescent zones traversed by the incident light.

L'écart ΔE entre les troisième et quatrième couleurs, dans l'espace colorimétrique CIEL*C*h 1976, peut être d'au moins 2, notamment au moins 5, ce qui le rend facilement observable.The difference ΔE between the third and fourth colors, in the CIEL * C * h 1976 color space, may be at least 2, especially at least 5, which makes it easily observable.

L'authentification et/ou l'identification d'un article ou document peut ainsi passer par la détection de quatre couleurs différentes, ce qui renforce encore la sécurité.Authentication and / or identification of an article or document can thus pass through the detection of four different colors, which further enhances security.

Par exemple, sous un éclairage UV, en réflexion, la première zone fluorescente apparaît jaune et la deuxième zone fluorescente bleue, et, observée en lumière transmise, la structure présente une couleur violette lorsqu'elle est observée depuis une première face et apparaît sensiblement blanche lorsqu'elle est observée depuis une deuxième face, opposée à la première.For example, under UV light, in reflection, the first fluorescent zone appears yellow and the second blue fluorescent zone, and, observed in transmitted light, the structure has a violet color when it is observed from a first face and appears substantially white when it is observed from a second side, opposite to the first.

Les couleurs et leur nombre peuvent être différents de ceux décrits ci-dessus.The colors and their number may be different from those described above.

En variante, les première et deuxième zones fluorescentes présentent des spectres d'absorption choisis de manière à ce que, dans la condition d'éclairage prédéfinie, la superposition des deux zones fluorescentes apparaisse en lumière transmise sensiblement de la même couleur, quel que soit le côté d'observation.As a variant, the first and second fluorescent zones have absorption spectra chosen so that, in the predefined lighting condition, the superposition of the two fluorescent zones appears in transmitted light of substantially the same color, whatever the observation side.

Dans un exemple de mise en oeuvre de l'invention, la structure comporte au moins une troisième zone fluorescente présentant une couleur différente de la première zone fluorescente et observable sur la même face, dans la condition d'éclairage prédéfinie.In an exemplary implementation of the invention, the structure comprises at least a third fluorescent zone having a color different from the first fluorescent zone and observable on the same face, in the predefined lighting condition.

La structure comporte avantageusement :

  • au moins une troisième zone fluorescente apparaissant de la deuxième couleur précitée, dans la condition d'éclairage prédéfinie, les première et troisième zones étant observables depuis une première face de la structure,
  • au moins une quatrième zone fluorescente apparaissant de la première couleur précitée, dans la condition d'éclairage prédéfinie, les deuxième et quatrième zones étant observables depuis une deuxième face de la structure, opposée à la première, chaque zone fluorescente d'une face se superposant au moins partiellement, de préférence sensiblement exactement, avec une zone fluorescente de couleur différente de l'autre face.
The structure advantageously comprises:
  • at least one third fluorescent zone appearing from the aforementioned second color, in the predefined lighting condition, the first and third zones being observable from a first face of the structure,
  • at least a fourth fluorescent zone appearing from the aforementioned first color, in the predefined lighting condition, the second and fourth zones being observable from a second face of the structure, opposite to the first, each fluorescent zone of a face superimposed at least partially, preferably substantially exactly, with a fluorescent zone of different color of the other face.

Lorsque l'ordre de superposition des zones fluorescentes n'est pas sans effet sur le résultat produit lors de l'observation en lumière transmise, on peut observer sur chaque face de la structure, en lumière transmise, dans la condition d'éclairage prédéfinie, une alternance de zones fluorescentes apparaissant respectivement des troisième et quatrième couleurs. Ainsi, quelle que soit la face qui est observée, la structure présente globalement le même aspect dans la condition d'éclairage prédéfinie, ce qui peut faciliter l'authentification et/ou l'identification.When the order of superposition of the fluorescent zones is not without effect on the result produced during the observation in transmitted light, it is possible to observe on each side of the structure, in transmitted light, in the predefined lighting condition, an alternation of fluorescent zones appearing respectively of the third and fourth colors. Thus, whatever the face that is observed, the structure generally has the same appearance in the predefined lighting condition, which can facilitate authentication and / or identification.

De préférence, la troisième zone fluorescente, respectivement la quatrième zone fluorescente, est adjacente à la première zone, respectivement la deuxième zone, ces zones se superposant de préférence sensiblement exactement. La structure est avantageusement non opaque dans une région de jonction des première et troisième zones fluorescentes, respectivement des deuxième et quatrième zones fluorescentes.Preferably, the third fluorescent zone, respectively the fourth fluorescent zone, is adjacent to the first zone, respectively the second zone, these zones overlapping preferably substantially exactly. The structure is advantageously non-opaque in a junction region of the first and third fluorescent zones, respectively of the second and fourth fluorescent zones.

Une telle structure offre une sécurité renforcée contre la falsification dans la mesure où un défaut dans la disposition des zones fluorescentes peut être détecté relativement facilement. En effet, lorsque les zones fluorescentes des faces opposées de la structure se superposent exactement, une observation de la structure par transparence, dans la condition d'éclairage prédéfinie, révèle seulement une ou deux couleurs. En revanche, lorsque des zones fluorescentes des faces opposées ne se superposent pas exactement et débordent sur des zones fluorescentes voisines, d'autres couleurs sont révélées.Such a structure provides enhanced tamperproofing insofar as a defect in the arrangement of the fluorescent zones can be detected relatively easily. Indeed, when the fluorescent zones of the opposite faces of the structure are superimposed exactly, an observation of the structure by transparency, in the predefined lighting condition, reveals only one or two colors. On the other hand, when fluorescent zones of the opposite faces are not superimposed exactly and overflow on neighboring fluorescent zones, other colors are revealed.

Dans un exemple de mise en oeuvre de l'invention, la structure présente au moins une face, notamment deux faces opposées entièrement fluorescente(s). En variante, la structure présente au moins une face, notamment deux faces opposées, non entièrement fluorescente(s), comportant par exemple des zones fluorescentes alternant avec des zones non fluorescentes.In an exemplary implementation of the invention, the structure has at least one face, in particular two opposite fully fluorescent faces. Alternatively, the structure has at least one face, in particular two opposite faces, not entirely fluorescent (s), for example with fluorescent zones alternating with non-fluorescent areas.

Dans un exemple de mise en oeuvre de l'invention, la structure comporte un support au moins partiellement, notamment entièrement, transparent ou translucide, et portant les zones fluorescentes. Le support peut être flexible, étant notamment réalisé en matière plastique, par exemple en polyester.In an exemplary implementation of the invention, the structure comprises a support at least partially, in particular entirely, transparent or translucent, and carrying the fluorescent zones. The support may be flexible, being in particular made of plastic, for example polyester.

L'une au moins des zones fluorescentes peut être formée par un dépôt d'une composition fluorescente sur une face du support.At least one of the fluorescent zones may be formed by depositing a fluorescent composition on one side of the support.

De préférence, la structure, par exemple le support, comporte au moins des première et deuxième portions adjacentes, la première portion ayant une aptitude à s'opposer au passage de la lumière, sous un éclairage donné, supérieure à celle de la deuxième portion.Preferably, the structure, for example the support, comprises at least first and second adjacent portions, the first portion having an ability to oppose the passage of light, under a given light, greater than that of the second portion.

La première portion peut être sensiblement opaque et/ou réfléchissante au moins dans la condition d'éclairage prédéfinie, par exemple sous éclairage UV et/ou au moins en éclairage ambiant.The first portion may be substantially opaque and / or reflective at least in the predefined lighting condition, for example under UV illumination and / or at least in ambient lighting.

La deuxième portion peut être sensiblement transparente et/ou translucide au moins dans la condition d'éclairage prédéfinie, par exemple sous éclairage UV et/ou au moins en éclairage ambiant.The second portion may be substantially transparent and / or translucent at least in the predefined lighting condition, for example under UV illumination and / or at least in ambient lighting.

De préférence, la deuxième portion précitée se superpose au moins partiellement avec au moins une zone fluorescente ou, le cas échéant, avec la superposition de deux zones fluorescentes, de manière à ce que, dans la condition d'éclairage prédéfinie, en lumière transmise, la deuxième portion apparaisse avec une couleur correspondant à la zone fluorescente ou à la superposition des zones fluorescentes.Preferably, the aforesaid second portion is superimposed at least partially with at least one fluorescent zone or, where appropriate, with the superposition of two fluorescent zones, so that, in the predefined lighting condition, in transmitted light, the second portion appears with a color corresponding to the fluorescent zone or the superposition of the fluorescent zones.

Dans un exemple de mise en oeuvre de l'invention, la deuxième portion présente une forme choisie pour définir un motif, lequel apparaît, en lumière transmise, plus clair que des régions adjacentes de la structure.In an exemplary implementation of the invention, the second portion has a shape chosen to define a pattern, which appears, in transmitted light, brighter than adjacent regions of the structure.

La deuxième portion peut, le cas échéant, être entièrement entourée par la première.The second portion may, where appropriate, be entirely surrounded by the first.

Dans un autre exemple de mise en oeuvre de l'invention, la première portion présente une forme choisie pour définir un motif, lequel apparaît, en lumière transmise, plus sombre que des régions adjacentes de la structure.In another embodiment of the invention, the first portion has a shape chosen to define a pattern, which appears, in transmitted light, darker than adjacent regions of the structure.

La première portion peut, le cas échéant, être entièrement entourée par la deuxième.The first portion may, where appropriate, be entirely surrounded by the second.

Le motif peut être choisi parmi l'un des éléments suivants : une lettre, un dessin, un symbole, un logo, cette liste n'étant pas limitative.The pattern can be chosen from one of the following elements: a letter, a drawing, a symbol, a logo, this list not being limiting.

Dans un exemple de mise en oeuvre de l'invention, la première portion précitée est formée par une couche métallique, notamment un dépôt métallique, et la deuxième portion précitée par une démétallisation de cette couche.In an exemplary implementation of the invention, the aforementioned first portion is formed by a metal layer, in particular a metal deposit, and the second aforementioned portion by a demetallization of this layer.

En variante, la structure comporte une impression en négatif ou en positif d'une encre, la première portion comportant l'encre et la deuxième en étant dépourvue.In a variant, the structure comprises a negative or positive printing of an ink, the first portion comprising the ink and the second portion being devoid of it.

Avantageusement, la deuxième portion précitée et la zone fluorescente la recouvrant au moins partiellement sont non opaques en lumière blanche de manière à permettre l'observation, en éclairage ambiant, par transparence, de motifs présents sur la structure, offrant ainsi une sécurité supplémentaire.Advantageously, the aforesaid second portion and the fluorescent zone at least partially covering it are non-opaque in white light so as to allow the observation, in ambient light, by transparency, of patterns present on the structure, thus providing additional security.

L'invention peut ainsi permettre d'avoir, pour un document, les niveaux de sécurité suivants :

  • premier niveau : observation en éclairage ambiant, par transparence, de la ou des deuxièmes portions, avec reconnaissance du ou des motifs correspondants,
  • deuxième niveau : observation des zones fluorescentes, par réflexion, dans la condition d'éclairage prédéfinie,
  • troisième niveau : observation, en lumière transmise, dans la condition d'éclairage prédéfinie, de la ou des deuxièmes portions, avec reconnaissance du ou des motifs et, le cas échéant, des couleurs formées par la superposition des zones fluorescentes.
The invention can thus make it possible to have, for a document, the following security levels:
  • first level: observation in ambient lighting, by transparency, of the second portion or portions, with recognition of the corresponding pattern or patterns,
  • second level: observation of the fluorescent zones, by reflection, in the predefined lighting condition,
  • third level: observation, in transmitted light, in the predefined lighting condition, of the second or portions, with recognition of the pattern (s) and, where appropriate, the colors formed by the superposition of the fluorescent zones.

Avantageusement, la deuxième portion s'étend sur une région de jonction entre des première et troisième zones fluorescentes adjacentes précitées, respectivement deuxième et quatrième zones fluorescentes adjacentes.Advantageously, the second portion extends over a junction region between adjacent first and third adjacent fluorescent zones, respectively second and fourth adjacent fluorescent zones.

La première portion opaque et/ou réfléchissante précitée peut éventuellement comporter une composition contenant ou non des pigments ou colorants fluorescents.The first portion opaque and / or reflective above may optionally comprise a composition containing or not fluorescent pigments or dyes.

Dans un exemple de mise en oeuvre de l'invention, les première et deuxième portions précitées forment une pluralité de motifs ou groupes de motifs se répétant, de manière régulière ou aléatoire, suivant une direction prédéterminée.In an exemplary implementation of the invention, the aforementioned first and second portions form a plurality of patterns or groups of patterns repeating, regularly or randomly, in a predetermined direction.

Afin d'améliorer encore la protection, la structure peut comporter l'un des éléments suivants :

  • une puce électronique,
  • un élément holographique ou diffractif,
  • un revêtement magnétique ou cristallin,
  • des cristaux liquides,
  • une impression d'un vernis,
  • un marqueur, notamment biologique, minéral ou synthétique,
  • une encre ou une substance luminescente,
  • un pigment thermochromique et/ou piézochromique.
In order to further improve the protection, the structure may include one of the following:
  • an electronic chip,
  • a holographic or diffractive element,
  • a magnetic or crystalline coating,
  • liquid crystals,
  • an impression of a varnish,
  • a marker, in particular a biological, mineral or synthetic marker,
  • an ink or a luminescent substance,
  • a thermochromic and / or piezochromic pigment.

La structure peut se présenter sous diverses formes, par exemple en bande, et constituer par exemple un fil de sécurité. La structure peut présenter une largeur par exemple supérieure à 0,7 mm et de préférence inférieure à 60 mm, notamment comprise entre 1 mm et 40 mm.The structure can be in various forms, for example strip, and constitute for example a security thread. The structure may have a width for example greater than 0.7 mm and preferably less than 60 mm, in particular between 1 mm and 40 mm.

Dans un exemple de mise en oeuvre de l'invention, la structure est agencée pour être incorporée entièrement dans ou sur l'article de sécurité et/ou de valeur.In an exemplary implementation of the invention, the structure is arranged to be fully incorporated in or on the security article and / or value.

En variante, la structure comporte un support formant bande porteuse agencé pour être séparé d'au moins une couche fluorescente après application de la structure sur un article, notamment un document de sécurité et/ou de valeur, la structure pouvant comporter, le cas échéant, entre le support et la couche fluorescente, au moins une couche de libération. La structure peut constituer par exemple un patch de sécurité.As a variant, the structure comprises a support forming a carrier strip arranged to be separated from at least one fluorescent layer after application of the structure to an article, in particular a security and / or value document, the structure possibly comprising, where appropriate between the support and the fluorescent layer, at least one release layer. The structure may constitute for example a security patch.

L'invention a encore pour objet, selon un autre de ses aspects, un article, par exemple un document de sécurité et/ou de valeur, comportant une structure de sécurité telle que précitée.The invention further relates, in another of its aspects, an article, for example a security document and / or value, comprising a security structure as mentioned above.

La structure peut être au moins partiellement noyée dans une couche de l'article, et comporter par exemple alternativement des zones noyées dans une couche de l'article et des portions découvertes. La structure peut en variante venir à affleurement d'une face de l'article ou être entièrement noyée dans celui-ci.The structure may be at least partially embedded in a layer of the article, and may comprise for example alternately zones embedded in a layer of the article and exposed portions. The structure may alternatively come flush with one face of the article or be entirely embedded therein.

L'article peut comporter, au contact de la structure, au moins une couche fibreuse, contenant par exemple des fibres papetières, notamment cellulosiques et/ou des fibres de nature synthétique.The article may comprise, in contact with the structure, at least one fibrous layer, for example containing paper fibers, in particular cellulose fibers and / or fibers of synthetic nature.

En variante, l'article peut comporter, au contact de la structure, au moins une couche non fibreuse, par exemple en matière plastique.Alternatively, the article may comprise, in contact with the structure, at least one non-fibrous layer, for example plastic.

Dans un exemple de mise en oeuvre de l'invention, la structure de sécurité s'étend d'un premier bord de l'article à un deuxième bord, opposé au premier.In an exemplary implementation of the invention, the security structure extends from a first edge of the article to a second edge, opposite the first.

L'article peut être destiné à recevoir une impression notamment pour former un document.The article may be intended to receive an impression, in particular to form a document.

L'article peut être destiné à constituer l'un des éléments suivants : un billet de banque, un papier de sécurité, un feuillet ou une couverture de passeport, un visa, un coupon, un document de valeur autre qu'un billet de banque, par exemple un chèque ou une carte de crédit, une étiquette de protection et/ou d'authentification, une étiquette de traçabilité, un disque optique, un ticket.The item may be one of the following: a bank note, security paper, passport slip or cover, visa, coupon, valuable document other than a bank note for example a check or a credit card, a protection and / or authentication label, a traceability label, an optical disc, a ticket.

L'article comporte de préférence une région au droit des zones fluorescentes suffisamment transparente et/ou translucide de manière à ce qu'au moins une portion des zones fluorescentes soit visible à travers ladite région lorsque l'article est observé, par transparence.The article preferably comprises a region of sufficiently transparent and / or translucent fluorescent zones so that at least a portion of the fluorescent zones is visible through said region when the article is observed, by transparency.

La région précitée peut correspondre par exemple à un ajour dans l'article ou à une couche au moins d'un matériau transparent et/ou translucide.The aforementioned region may correspond, for example, to an opening in the article or to at least one layer of a transparent and / or translucent material.

L'invention a encore pour objet, selon un autre de ses aspects, un procédé de fabrication d'un article, comportant les étapes suivantes :

  • fournir une structure telle que précitée,
  • incorporer ou transférer au moins partiellement la structure dans ou sur l'article.
The invention further relates, in another of its aspects, to a method of manufacturing an article, comprising the following steps:
  • provide a structure as mentioned above,
  • at least partially incorporating or transferring the structure into or onto the article.

Lorsque l'article comporte une couche fibreuse, le procédé peut comporter les étapes suivantes :

  • former la couche fibreuse par dépôt de fibres sur une surface immergée dans une dispersion de matière fibreuse,
  • amener la structure au contact de la couche fibreuse en formation.
When the article comprises a fibrous layer, the method may comprise the following steps:
  • forming the fibrous layer by deposition of fibers on a surface immersed in a dispersion of fibrous material,
  • bring the structure into contact with the fibrous layer in formation.

En variante, le procédé peut comporter les étapes suivantes :

  • amener au contact d'une face d'un article un support d'au moins une couche fluorescente,
  • transférer la couche fluorescente,
  • après le transfert, séparer le support de la couche fluorescente.
Alternatively, the method may comprise the following steps:
  • bringing into contact with a face of an article a support of at least one fluorescent layer,
  • transfer the fluorescent layer,
  • after the transfer, separate the support from the fluorescent layer.

L'invention a encore pour objet, selon un autre de ses aspects, un procédé d'authentification et/ou d'identification d'un article comportant une structure telle que définie plus haut, le procédé comportant les étapes suivantes :

  • exposer l'article à la condition d'éclairage prédéfinie,
  • vérifier l'authenticité et/ou l'identité de l'article à partir de la ou des couleurs révélées par les zones fluorescentes.
According to another of its aspects, the subject of the invention is also a method for authenticating and / or identifying an article comprising a structure as defined above, the method comprising the following steps:
  • expose the item to the predefined lighting condition,
  • verify the authenticity and / or the identity of the article from the color or colors revealed by the fluorescent zones.

Lorsque les première et deuxième zones fluorescentes sont non opaques, observables depuis des faces opposées de la structure et se superposant au moins partiellement, le procédé comporte avantageusement les étapes suivantes :

  • observer la première zone fluorescente en lumière réfléchie, dans la condition d'éclairage prédéfinie,
  • observer la deuxième zone fluorescente en lumière réfléchie, dans la condition d'éclairage prédéfinie,
  • observer la structure en lumière transmise, dans la condition d'éclairage prédéfinie,
  • vérifier l'authenticité et/ou l'identité de l'article à partir des couleurs observées dans les étapes ci-dessus.
When the first and second fluorescent zones are non-opaque, observable from opposite faces of the structure and overlapping at least partially, the method advantageously comprises the following steps:
  • observe the first fluorescent zone in reflected light, in the predefined lighting condition,
  • observe the second fluorescent zone in reflected light, in the predefined lighting condition,
  • observe the structure in transmitted light, in the predefined lighting condition,
  • check the authenticity and / or the identity of the article from the colors observed in the steps above.

Lorsque les première et deuxième zones fluorescentes présentent des spectres d'absorption choisis de manière à ce que, dans la condition d'éclairage prédéfinie, une lumière traversant successivement les deux zones fluorescentes présente des troisième et quatrième couleurs, différentes des première et deuxième couleurs, selon l'ordre des zones fluorescentes traversées par la lumière incidente, le procédé comporte avantageusement les étapes suivantes :

  • observer la structure en lumière transmise, dans la condition d'éclairage prédéfinie, depuis une première face de l'article,
  • observer la structure en lumière transmise, dans la condition d'éclairage prédéfinie, depuis une deuxième face de l'article, opposée à la première,
  • vérifier l'authenticité et/ou l'identité de l'article à partir des couleurs observées dans les étapes ci-dessus.
When the first and second fluorescent zones have absorption spectra chosen so that, in the predefined lighting condition, a light passing successively through the two fluorescent zones has third and fourth colors, different from the first and second colors, according to the order of the fluorescent zones traversed by the incident light, the method advantageously comprises the following steps:
  • observe the transmitted light structure, in the predefined lighting condition, from a first face of the article,
  • observe the structure in transmitted light, in the predefined lighting condition, from a second face of the article, opposite to the first,
  • check the authenticity and / or the identity of the article from the colors observed in the steps above.

L'invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'exemples de mise en oeuvre non limitatifs de celle-ci, et à l'examen du dessin annexé, sur lequel :

  • la figure 1 représente, schématiquement et partiellement, un exemple d'article réalisé conformément à l'invention,
  • les figures 2 et 3 représentent, schématiquement et partiellement, en coupe, la structure incorporée dans l'article de la figure 1, conformément à deux exemples de mise en oeuvre de l'invention,
  • les figures 4 à 13 représentent, schématiquement et partiellement, d'autres exemples de mise en oeuvre de la structure,
  • les figures 14 à 16 représentent, schématiquement et partiellement, en coupe transversale, des articles respectivement conformes à divers exemples de mise en oeuvre de l'invention,
  • la figure 17 illustre schématiquement une étape d'un procédé de fabrication de l'article de la figure 1,
  • la figure 18 représente, schématiquement et partiellement, en coupe transversale, une structure de sécurité conforme à un autre exemple de mise en oeuvre de l'invention,
  • la figure 19 représente, schématiquement et partiellement, en coupe transversale, un article incorporant la structure de la figure 18, et
  • la figure 20 illustre schématiquement une étape du procédé de fabrication de l'article de la figure 19, conformément à un exemple de mise en oeuvre de l'invention.
The invention will be better understood on reading the following detailed description, non-limiting examples of implementation thereof, and on examining the appended drawing, in which:
  • the figure 1 represents, schematically and partially, an example of an article produced according to the invention,
  • the Figures 2 and 3 represent, schematically and partially, in section, the structure incorporated in the article of the figure 1 according to two examples of implementation of the invention,
  • the Figures 4 to 13 represent, schematically and partially, other examples of implementation of the structure,
  • the Figures 14 to 16 show schematically and partially, in cross-section, articles respectively complying with various examples of implementation of the invention,
  • the figure 17 schematically illustrates a step of a method of manufacturing the article of the figure 1 ,
  • the figure 18 represents, schematically and partially, in cross-section, a security structure according to another example of implementation of the invention,
  • the figure 19 represents, schematically and partially, in cross section, an article incorporating the structure of the figure 18 , and
  • the figure 20 schematically illustrates a step of the manufacturing process of the article of the figure 19 according to an exemplary implementation of the invention.

Sur le dessin, dans un souci de clarté, les proportions relatives des différents éléments représentés n'ont pas toujours été respectées, les vues étant schématiques.In the drawing, for the sake of clarity, the relative proportions of the various elements represented have not always been respected, the views being schematic.

On a représenté sur la figure 1 un article 1, par exemple un billet de banque, comportant une couche fibreuse 2, dans laquelle est incorporée une structure de sécurité 3 conforme à l'invention.We have shown on the figure 1 an article 1, for example a bank note, comprising a fibrous layer 2, in which is incorporated a security structure 3 according to the invention.

L'article 1 peut encore constituer un papier de sécurité, un feuillet ou une couverture de passeport, un visa, un coupon, un document de valeur autre qu'un billet de banque, par exemple un chèque ou une carte de crédit, une étiquette de protection et/ou d'authentification, une étiquette de traçabilité ou un disque optique.Section 1 may still be a security paper, a passport slip or cover, a visa, a coupon, a document of value other than a ticket bank, for example a check or a credit card, a protection and / or authentication label, a traceability label or an optical disc.

L'article 1 peut être constitué par la structure elle-même, le cas échéant, par exemple dans le cas d'un billet de banque en matière plastique.Article 1 may be constituted by the structure itself, if necessary, for example in the case of a plastic banknote.

La structure 3 se présente, dans l'exemple considéré, sous la forme d'une bande d'axe longitudinal X, avec une largeur inférieure à celle de l'article 1, étant par exemple d'environ 15 mm ou moins.In the example under consideration, the structure 3 is in the form of a longitudinal axis strip X, with a width smaller than that of the article 1, for example being about 15 mm or less.

La structure 3 peut être complètement noyée dans l'article 1, comme on peut le voir sur la figure 14. En variante, comme illustré sur la figure 15, la structure 3 vient à affleurement d'une face 4 de celui-ci. En variante encore, comme illustré sur la figure 16, la structure 3 est noyée partiellement dans la couche fibreuse 2, de manière à présenter alternativement des portions noyées et découvertes. A cet effet, la couche fibreuse 2 peut comporter des renfoncements 5 laissant des portions de la structure 3 découvertes. La couche fibreuse 2 peut comporter, le cas échéant, des bossages 7, représentés en pointillés sur la figure 16, situés entre les renfoncements 5.Structure 3 can be completely embedded in Article 1, as can be seen in figure 14 . Alternatively, as illustrated on the figure 15 , the structure 3 comes flush with a face 4 thereof. In another variant, as illustrated on the figure 16 , the structure 3 is partially embedded in the fibrous layer 2, so as to present alternately embedded and uncovered portions. For this purpose, the fibrous layer 2 may include recesses 5 leaving portions of the structure 3 discovered. The fibrous layer 2 may comprise, if appropriate, bosses 7, shown in dotted lines on the figure 16 , located between the recesses 5.

L'article 1 peut présenter, le cas échéant, des ajours facilitant l'observation en lumière transmise.Article 1 may have, where appropriate, openings facilitating observation in transmitted light.

La structure 3 comporte par exemple un support 10 en matière plastique transparente, notamment en polyester, comme illustré à la figure 2.The structure 3 comprises for example a support 10 made of transparent plastic, in particular polyester, as illustrated in FIG. figure 2 .

La structure 3 comporte une première portion 13 sensiblement opaque et/ou réfléchissante entourant des deuxièmes portions 12 sensiblement transparentes.The structure 3 comprises a first portion 13 substantially opaque and / or reflective surrounding second portions 12 substantially transparent.

Dans l'exemple considéré, les deuxièmes portions 12 forment des groupes de motifs 11 tels que des textes, comme illustré sur les figures 6 et 7, se répétant suivant la direction longitudinale de la structure 3.In the example under consideration, the second portions 12 form groups of patterns 11 such as texts, as illustrated in FIGS. Figures 6 and 7 , repeating in the longitudinal direction of structure 3.

Les motifs peuvent, en variante, représenter un dessin, un symbole ou un logo.The patterns may alternatively represent a drawing, a symbol or a logo.

La première portion 13 peut être formée par un dépôt métallique et les portions 12 par une démétallisation de ce dépôt.The first portion 13 may be formed by a metal deposit and the portions 12 by a demetallization of this deposit.

En variante, la première portion 13 est formée par un dépôt d'une encre obtenue par impression en négatif et les deuxièmes portions 12 correspondent aux zones dépourvues d'encre.In a variant, the first portion 13 is formed by a deposit of an ink obtained by negative printing and the second portions 12 correspond to the zones that are devoid of ink.

Les portions 12 et 13 peuvent être réalisées sur une face seulement du support 10, comme illustré sur la figure 2, ou, en variante, sur deux faces opposées du support 10, comme illustré sur la figure 3.The portions 12 and 13 may be made on only one side of the support 10, as shown in FIG. figure 2 , or, alternatively, on two opposite sides of the support 10, as illustrated in FIG. figure 3 .

Le support 10 avec les portions 13 est recouvert sur l'une au moins de ses faces d'au moins une composition fluorescente.The support 10 with the portions 13 is covered on at least one of its faces with at least one fluorescent composition.

Dans l'exemple des figures 2 et 3, le support 10 et les portions 13 sont recouverts par des compositions fluorescentes 15 et 16 apparaissant respectivement en fluorescence d'une première couleur C1 et d'une deuxième couleur C2, dans une condition d'éclairage prédéfinie, par exemple sous éclairage UV, notamment de longueur d'onde voisine de 365 nm.In the example of Figures 2 and 3 , the support 10 and the portions 13 are covered by fluorescent compositions 15 and 16 appearing respectively in fluorescence of a first color C 1 and a second color C 2 , under a predefined lighting condition, for example under UV illumination , in particular of wavelength close to 365 nm.

En outre, les compositions fluorescentes 15 et 16 présentent des spectres d'absorption choisis de manière à ce que, dans la condition d'éclairage prédéfinie, leur superposition apparaisse d'une troisième couleur C3 ou d'une quatrième couleur C4, différentes des première et deuxième couleurs C1 et C2, selon l'ordre des compositions fluorescentes traversées par la lumière incidente.In addition, the fluorescent compositions 15 and 16 have absorption spectra chosen so that, in the predefined lighting condition, their superposition appears from a third color C 3 or a fourth color C 4 , different first and second colors C 1 and C 2 , according to the order of the fluorescent compositions traversed by the incident light.

Les compositions fluorescentes 15 et 16 sont par exemple celles commercialisées par la société HONEYWELL.The fluorescent compositions 15 and 16 are, for example, those marketed by HONEYWELL.

Les compositions 15 et 16 sont non opaques, de sorte que les deuxièmes portions 12 peuvent être observées en lumière du jour, par transparence.The compositions 15 and 16 are non-opaque, so that the second portions 12 can be observed in daylight, by transparency.

On va maintenant décrire, en référence aux figures 4 à 7, différentes étapes permettant d'authentifier et/ou d'identifier l'article 1.We will now describe, with reference to Figures 4 to 7 , different steps to authenticate and / or identify the article 1.

Lorsque l'article 1 est observé depuis la face 18 de la structure 3, dans la condition d'éclairage prédéfinie, en réflexion, la structure 3 apparaît avec la première couleur C1, comme illustré sur la figure 4.When the article 1 is observed from the face 18 of the structure 3, in the predefined lighting condition, in reflection, the structure 3 appears with the first color C 1 , as illustrated in FIG. figure 4 .

En observant l'article 1 depuis la face 19 opposée, toujours dans la condition d'éclairage prédéfinie, en réflexion, la structure 3 apparaît avec la deuxième couleur C2, comme illustré sur la figure 5.By observing the article 1 from the opposite face 19, still in the predefined lighting condition, in reflection, the structure 3 appears with the second color C 2 , as shown in FIG. figure 5 .

Dans la condition d'éclairage prédéfinie, lorsque l'article 1 est observé en lumière transmise depuis la face 18, les portions 12 apparaissent avec la troisième couleur C3, comme on peut le voir sur la figure 6, et une observation par transparence depuis l'autre face 19 laisse apparaître les portions 12 avec la quatrième couleur C4, comme illustré sur la figure 7.In the predefined illumination condition, when the article 1 is observed in light transmitted from the face 18, the portions 12 appear with the third color C 3 , as can be seen in FIG. figure 6 , and an observation by transparency from the other face 19 reveals the portions 12 with the fourth color C 4 , as illustrated in FIG. figure 7 .

Ainsi, l'authentification et/ou l'identification de l'article 1 peut passer par l'observation de quatre couleurs différentes.Thus, the authentication and / or the identification of the article 1 can go through the observation of four different colors.

Dans l'exemple qui vient d'être décrit, la structure 3 présente sur chaque face 18 ou 19 une couleur unique, dans la condition d'éclairage prédéfmie.In the example just described, the structure 3 has on each face 18 or 19 a single color, in the predefined lighting condition.

On ne sort pas du cadre de la présente invention lorsque la structure de sécurité comporte sur chaque face des zones fluorescentes de couleurs différentes.It is not beyond the scope of the present invention when the security structure comprises on each face fluorescent zones of different colors.

On a représenté sur les figures 8 et 9 une structure 3' conforme à l'invention, présentant sur des faces opposées 20 et 23 une alternance de zones fluorescentes adjacentes 21 et 22, respectivement 24 et 25. Les zones 21 et 25, respectivement 22 et 24, sont capables d'émettre par fluorescence une lumière d'une première couleur C1, respectivement d'une deuxième couleur C2, dans la condition d'éclairage prédéfinie.We have shown on Figures 8 and 9 a structure 3 'according to the invention, having on opposite sides 20 and 23 an alternation of adjacent fluorescent zones 21 and 22, respectively 24 and 25. The zones 21 and 25, respectively 22 and 24, are capable of emitting fluorescence a light of a first color C 1 , respectively of a second color C 2 , in the predefined lighting condition.

Dans l'exemple considéré, les zones fluorescentes 21, 22, 24 et 25 présentent une forme rectangulaire. Bien entendu, ces zones fluorescentes peuvent présenter une forme autre, par exemple trapézoïdale.In the example considered, the fluorescent zones 21, 22, 24 and 25 have a rectangular shape. Of course, these fluorescent zones may have a different shape, for example trapezoidal.

Chaque zone 21, respectivement 22, se superpose exactement avec une zone 24, respectivement 25, de l'autre face. Dans l'exemple considéré, chaque paire de zones fluorescentes 21, 24 et 22, 25 recouvre entièrement un groupe de portions 12.Each zone 21, respectively 22, is superimposed exactly with a zone 24, respectively 25, of the other face. In the example considered, each pair of fluorescent zones 21, 24 and 22 completely covers a group of portions 12.

La couleur C3 ou C4 produite par l'observation en lumière transmise des zones fluorescentes dépend de l'ordre dans lequel la lumière les traverse.The color C 3 or C 4 produced by the observation in transmitted light of the fluorescent zones depends on the order in which the light passes through them.

L'authentification et/ou l'identification d'un article comportant la structure 3' peut comporter ainsi les étapes suivantes :

  • observer la structure 3' depuis la face 20, respectivement 23, dans la condition d'éclairage prédéfinie, en réflexion, de manière à détecter l'alternance de couleurs C1 et C2 sur la face 20, respectivement 23, comme illustré sur les figures 8 et 9,
  • observer la face 20, respectivement la face 23, de la structure 3' dans la condition d'éclairage prédéfinie, par transparence, comme illustré sur les figures 10 et 11, afin de détecter la succession de groupes de portions 12 présentant alternativement des couleurs C3 et C4.
Authentication and / or identification of an article comprising the structure 3 'may thus comprise the following steps:
  • observe the structure 3 'from the face 20, respectively 23, in the predefined lighting condition, in reflection, so as to detect the alternation of colors C1 and C2 on the face 20, respectively 23, as illustrated on the Figures 8 and 9 ,
  • observe the face 20, respectively the face 23, of the structure 3 'in the predefined lighting condition, by transparency, as illustrated on the Figures 10 and 11 to detect the succession of groups of portions 12 having alternately C3 and C4 colors.

Afm de renforcer la sécurité de la structure 3', il est possible de prévoir, comme illustré sur la figure 12, des portions intermédiaires 27 transparentes et/ou translucides, entre deux groupes de portions 12, ces portions intermédiaires 27 laissant apparaître la jonction de deux zones fluorescentes adjacentes 21 et 22, respectivement 24 et 25, au moins par transparence.In order to reinforce the safety of the 3 'structure, it is possible to foresee, as illustrated on the figure 12 , transparent and / or translucent intermediate portions 27 between two groups of portions 12, these intermediate portions 27 revealing the joining two adjacent fluorescent zones 21 and 22, respectively 24 and 25, at least by transparency.

Ainsi, dans la condition d'éclairage prédéfmie, lorsque la structure 3' est observée en transparence depuis la face 20 par exemple, les portions intermédiaires 27 présentent chacune les couleurs C3 et C4.Thus, in the predefined illumination condition, when the structure 3 'is observed in transparency from the face 20 for example, the intermediate portions 27 each have the colors C 3 and C 4 .

On constate que, dans le cas où les zones fluorescentes 21, 22 et 24, 25 ne coïncideraient pas exactement, car par exemple l'une des zones fluorescentes 22 est plus large que la zone 25 en regard, la portion intermédiaire 27 présenterait non seulement les deux couleurs C3 et C4, mais également une portion avec la couleur C2 correspondant à la superposition de la zone 22 avec la zone 24 voisine, ce qui implique la falsification de la structure 3'.It is found that, in the case where the fluorescent zones 21, 22 and 24, 25 do not coincide exactly, because for example one of the fluorescent zones 22 is wider than the zone 25 opposite, the intermediate portion 27 would not only the two colors C 3 and C 4 , but also a portion with the color C 2 corresponding to the superposition of the zone 22 with the neighboring zone 24, which involves the falsification of the structure 3 '.

Les portions intermédiaires 27 peuvent former des motifs 28, par exemple des dessins, laissant apparaître la jonction entre deux zones fluorescentes adjacentes 21 et 22, respectivement 24 et 25, comme illustré sur la figure 13.The intermediate portions 27 may form patterns 28, for example, patterns, revealing the junction between two adjacent fluorescent zones 21 and 22, respectively 24 and 25, as shown in FIG. figure 13 .

On a représenté schématiquement et partiellement, sur la figure 17, une machine papetière de forme ronde.Diagrammatically and partially, on the figure 17 , a paper machine of round shape.

Cette machine comporte une cuve 40 comportant une suspension 41 de fibres, par exemple des fibres de cellulose et/ou des linters de coton et/ou des fibres synthétiques et/ou artificielles dans laquelle est partiellement immergé un cylindre de toile rotatif 42 définissant une surface 43 au contact de laquelle se forme la couche fibreuse 2.This machine comprises a tank 40 comprising a suspension 41 of fibers, for example cellulose fibers and / or cotton linters and / or synthetic and / or artificial fibers in which is partially immersed a cylinder of rotating fabric 42 defining a surface 43 in contact with which the fibrous layer 2 is formed.

On peut incorporer à la couche fibreuse 2, lors de sa formation, la structure 3.The formation of the structure 3 can be incorporated in the fibrous layer 2 during its formation.

Lorsque la couche fibreuse 2 comporte des bossages 7, comme décrit ci-dessus, le cylindre 42 comporte des reliefs 44, représentés en pointillés sur la figure 17, ces reliefs 44 étant constitués par exemple par des bossages sur le cylindre 42 ou par un ou plusieurs masques.When the fibrous layer 2 has bosses 7, as described above, the cylinder 42 has reliefs 44, shown in dashed lines on the figure 17 these reliefs 44 being constituted for example by bosses on the cylinder 42 or by one or more masks.

On a représenté sur la figure 18 une structure de sécurité 50, conforme à un autre exemple de mise en oeuvre de l'invention.We have shown on the figure 18 a security structure 50, according to another example of implementation of the invention.

Cette structure 50, encore appelée « foil » ou « patch », comporte :

  • un support 51, par exemple en polyester,
  • une couche de libération 52, par exemple en cire,
  • éventuellement une couche de vernis 53,
  • une première couche d'une première composition fluorescente 54, les couches 53 et 54 pouvant encore être confondues,
  • une couche dans laquelle sont réalisées une ou plusieurs portions 13, par exemple une couche de métal partiellement démétallisée,
  • une deuxième couche d'une deuxième composition fluorescente 55, et
  • une couche d'adhésif 56, les couches 55 et 56 étant éventuellement confondues.
This structure 50, also called "foil" or "patch", comprises:
  • a support 51, for example of polyester,
  • a release layer 52, for example wax,
  • optionally a layer of varnish 53,
  • a first layer of a first fluorescent composition 54, the layers 53 and 54 still being confused,
  • a layer in which one or more portions 13 are made, for example a partially demetallized metal layer,
  • a second layer of a second fluorescent composition 55, and
  • an adhesive layer 56, the layers 55 and 56 possibly being merged.

L'éventuelle couche de vernis 53, la première composition fluorescente 54, la couche définissant la ou les portions 13 et la deuxième composition fluorescente 55 forment un ensemble 60 à transférer sur une couche fibreuse 2, par exemple à la surface de celle-ci comme illustré sur la figure 19.The optional layer of varnish 53, the first fluorescent composition 54, the layer defining the portion or portions 13 and the second fluorescent composition 55 form an assembly 60 to be transferred to a fibrous layer 2, for example on the surface thereof as illustrated on the figure 19 .

L'ensemble 60 peut notamment être transféré à chaud sur la couche fibreuse 2, comme illustré sur la figure 20.The assembly 60 may in particular be transferred hot to the fibrous layer 2, as illustrated in FIG. figure 20 .

La couche 2 et la structure 50 sont alors entraînées en déplacement dans le même sens au moyen d'une machine comportant des premier 61 et deuxième 62 cylindres rotatifs. Après ce passage, le support 51 et la couche de libération 52 sont séparés de l'ensemble 60, qui reste solidaire de la couche 2.The layer 2 and the structure 50 are then driven in displacement in the same direction by means of a machine comprising first 61 and second 62 rotating cylinders. After this passage, the support 51 and the release layer 52 are separated from the assembly 60, which remains integral with the layer 2.

Dans l'exemple considéré, la couche 2 présente une épaisseur relativement faible permettant d'observer, par transparence, l'ensemble 60 depuis la face de la couche 2 opposée à l'ensemble 60.In the example considered, the layer 2 has a relatively small thickness making it possible to observe, by transparency, the assembly 60 from the face of the layer 2 opposite to the assembly 60.

En variante, la couche 2 peut par exemple être réalisée dans une matière transparente, par exemple une matière plastique transparente.Alternatively, the layer 2 may for example be made of a transparent material, for example a transparent plastic material.

Bien entendu, l'invention n'est pas limitée aux exemples de réalisation qui viennent d'être décrits.Of course, the invention is not limited to the embodiments which have just been described.

La structure selon l'invention peut être réalisée autrement qu'en bande, par exemple sous la forme d'un patch. La structure selon l'invention peut comporter des compositions présentant une fluorescence ailleurs que dans l'UV, par exemple dans l'infrarouge.The structure according to the invention may be made otherwise than in band, for example in the form of a patch. The structure according to the invention may comprise compositions having a fluorescence other than in the UV, for example in the infrared.

Les structures 3 et 3' et le « foil » 50 peuvent comporter, si on le souhaite, l'un des éléments suivants :

  • une puce électronique,
  • un élément holographique ou diffractif,
  • un revêtement magnétique ou cristallin,
  • des cristaux liquides,
  • une impression d'un vernis,
  • un marqueur, notamment biologique, minéral ou synthétique,
  • une encre ou une substance luminescente,
  • un pigment thermochromique et/ou piézochromique.
The structures 3 and 3 'and the "foil" 50 may comprise, if desired, one of the following elements:
  • an electronic chip,
  • a holographic or diffractive element,
  • a magnetic or crystalline coating,
  • liquid crystals,
  • an impression of a varnish,
  • a marker, in particular a biological, mineral or synthetic marker,
  • an ink or a luminescent substance,
  • a thermochromic and / or piezochromic pigment.

Dans toute la description, y compris les revendications, l'expression « comportant un » doit être comprise comme étant synonyme de l'expression « comportant au moins un », sauf si le contraire est spécifié.Throughout the description, including the claims, the phrase "having one" should be understood as being synonymous with the phrase "having at least one", unless the contrary is specified.

Claims (34)

  1. A security structure (3 ; 3'; 50) intended to be incorporated or fastened, at least partially, in or on an article (1), for example a security document and/or a document of value, the structure comprising:
    - at least one first fluorescent zone capable of emitting by fluorescence, under a predefined illumination condition, visible light of a first color (C1); and
    - at least one second fluorescent zone capable of emitting by fluorescence, under the predefined illumination condition, visible light of a second color (C2) that differs from the first, the first and second fluorescent zones being observable from the respective opposed faces (18; 19) of the structure,
    the structure being characterized in that at least one of the first and second fluorescent zones, in particular both, are at least partially nonopaque, at least under the predefined illumination condition, and in that the first and second fluorescent zones are superposed at least partially so that, under the predefined illumination condition, light passing in succession through the two fluorescent zones has a third color (C3) that differs from the first and second colors (C1, C2).
  2. The structure as claimed in the preceding claim, characterized in that the predefined illumination condition corresponds to ultraviolet illumination, in particular with a wavelength close to the visible.
  3. The structure as claimed in claim 1, characterized in that the predefined illumination condition corresponds to infrared illumination.
  4. The structure as claimed in any one of the preceding claims, characterized in that at least one of the first and second fluorescent zones, in particular both, are substantially colorless in white light.
  5. The structure as claimed in any one of the preceding claims, characterized in that the first and second fluorescent zones have absorption spectra chosen so that, under the predefined illumination condition, light passing in succession through the two fluorescent zones has third (C3) and fourth (C4) colors that differ from the first and second colors (C1, C2), depending on the order of the fluorescent zones through which the incident light passes.
  6. The structure as claimed in any one of the preceding claims, characterized in that it comprises at least one third fluorescent zone (22) observable on the face of the first fluorescent zone (21), having a color (C2) that differs from the first fluorescent zone (C1) under the predefined illumination condition.
  7. The structure as claimed in the preceding claim, characterized in that it comprises:
    - at least one third fluorescent zone (22) having said second color (C2) under the predefined illumination condition, the first and third zones being observable from a first face (20) of the structure; and
    - at least one fourth fluorescent zone (25) having said first color (C1) under the predefined illumination condition, the second (24) and fourth (25) zones being observable from a second face (23) of the structure, on the opposite side from the first,
    each fluorescent zone on one face being at least partially, preferably exactly, superposed with a fluorescent zone of different color on the other face.
  8. The structure as claimed in the preceding claim, characterized in that the third fluorescent zone (22), or the fourth fluorescent zone (25), is adjacent to the first fluorescent zone (21), or the second fluorescent zone (24), respectively.
  9. The structure as claimed in the preceding claim, characterized in that the structure is nonopaque in a joining region between the first (21) and third (22) fluorescent zones, or second (24) and fourth (25) fluorescent zones, respectively.
  10. The structure as claimed in any one of the preceding claims, characterized in that it has at least one entirely fluorescent face, in particular two opposed entirely fluorescent faces.
  11. The structure as claimed in any one of the preceding claims, characterized in that it comprises a support (10; 51) which is at least partially, in particular entirely, transparent or translucent and bears the fluorescent zones.
  12. The structure as claimed in the preceding claim, characterized in that the support (10 ; 51) is flexible, in particular being made of a plastic, for example a polyester.
  13. The structure as claimed in either of claims 11 and 13, characterized in that at least one of the fluorescent zones is formed by depositing a fluorescent composition (15; 16) on one face of the support.
  14. The structure as claimed in any one of the preceding claims, characterized in that it comprises at least first (13) and second (12) adjacent portions, the first (13) having a greater capability of preventing the passage of light, for a given illumination, than the second (12), the first portion (13) being in particular substantially opaque and/or reflective, at least under said predefined illumination condition, and the second portion (12) being substantially transparent and/or translucent, at least under said predefined illumination condition.
  15. The structure as claimed in the preceding claim, characterized in that the second portion (12) is at least partially superposed with at least one fluorescent zone (15, 16).
  16. The structure as claimed in either of the two preceding claims, characterized in that the second portion (12) has a shape chosen so as to define a pattern (11), the second portion being in particular entirely surrounded by the first.
  17. The structure as claimed in either of claims 14 and 15, characterized in that the first portion (13) has a shape chosen so as to define a pattern (11), the first portion being in particular entirely surrounded by the second.
  18. The structure as claimed in claim 19, characterized in that the pattern (11) is chosen from one of the following elements: a letter, a drawing, a symbol, a logo.
  19. The structure as claimed in any one of claims 14 to 18, characterized in that the first portion (13) is formed by a metal layer, in particular a metal coating, and the second portion (12) is formed by demetallizing this layer.
  20. The structure as claimed in any one of claims 14 to 18, characterized in that it includes printing, in negative or positive, with an ink, the first portion (13) having the ink and the second portion (12) having no ink.
  21. The structure as claimed in any one of the preceding claims, characterized in that it furthermore includes one of the following elements:
    - an electronic chip;
    - a holographic and/or diffractive element;
    - a magnetic or crystalline coating;
    - liquid crystals;
    - printing with a varnish;
    - a marker;
    - a luminescent ink or substance;
    - a thermochromic and/or piezochromic pigment.
  22. The structure as claimed in any one of the preceding claims, characterized in that it is in the form of a strip and constitutes for example a security thread.
  23. The structure as claimed in any one of the preceding claims, characterized in that it has a width of at least 0.7 mm but preferably less than 60 mm, in particular between 1 mm and 40 mm.
  24. The structure as claimed in any one of the preceding claims, characterized in that it is designed to be entirely incorporated into or onto the security article and/or the article of value.
  25. The structure as claimed in any one of claims 1 to 23, which includes a support (51) bearing at least one fluorescent layer, characterized in that the support (51) is designed to be separated from the fluorescent layer (53) after the structure has been applied on a security document and/or document of value, the structure constituting for example a security patch.
  26. An article at least partially comprising a security structure as defined in any one of the preceding claims.
  27. The article as claimed in the preceding claim, characterized in that the structure is at least partially, in particular entirely, embedded in a layer of the article.
  28. The article as claimed in the preceding claim, characterized in that the structure comprises, alternately, zones embedded in a layer of the article and portions that are exposed.
  29. The article as claimed in any one of claims 26 to 28, comprising at least one fibrous layer (2).
  30. The article as claimed in any one of claims 26 to 29, characterized in that the security article extends from a first edge of the article to a second edge, opposite the first.
  31. The article as claimed in any one of claims 26 to 30, characterized in that it is intended to receive printing.
  32. The article as claimed in any one of claims 26 to 31, characterized in that it is intended to constitute one of the following elements: a banknote; a security paper; a passport sheet or cover; a visa; a coupon; a document of value other than a banknote, for example a check or a credit card; a protective and/or authenticating label; a traceability label; a ticket.
  33. A method of manufacturing an article, which includes the following steps:
    - provision of a structure as claimed in any one of claims 1 to 25,
    - at least partial incorporation or transfer of the structure into or onto the article.
  34. A method of authenticating and/or identifying an article, for example a security document and/or a document of value, comprising a structure as claimed in any one of claims 1 to 25, the method including the following steps:
    - the article (1) is exposed to the predefined illumination condition; and
    - the authenticity and/or identity of the article is checked on the basis of the color or colors (C1; C2; C3; C4) revealed by the fluorescent zone.
EP05815536A 2004-11-08 2005-10-26 Security structure and article incorporating such a structure Active EP1831461B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL05815536T PL1831461T3 (en) 2004-11-08 2005-10-26 Security structure and article incorporating such a structure
SI200531405T SI1831461T1 (en) 2004-11-08 2005-10-26 Security structure and article incorporating such a structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0452558A FR2877609B1 (en) 2004-11-08 2004-11-08 SAFETY STRUCTURE AND ARTICLE INCORPORATING SUCH A STRUCTURE
PCT/FR2005/050903 WO2006051231A2 (en) 2004-11-08 2005-10-26 Security structure and article incorporating such a structure

Publications (2)

Publication Number Publication Date
EP1831461A2 EP1831461A2 (en) 2007-09-12
EP1831461B1 true EP1831461B1 (en) 2011-09-14

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US (1) US8118231B2 (en)
EP (1) EP1831461B1 (en)
AT (1) ATE524610T1 (en)
BR (1) BRPI0517712A (en)
CA (1) CA2586414C (en)
FR (1) FR2877609B1 (en)
PL (1) PL1831461T3 (en)
SI (1) SI1831461T1 (en)
WO (1) WO2006051231A2 (en)

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FR2877609B1 (en) 2007-03-09
CA2586414C (en) 2013-02-26
US8118231B2 (en) 2012-02-21
ATE524610T1 (en) 2011-09-15
EP1831461A2 (en) 2007-09-12
SI1831461T1 (en) 2011-12-30
PL1831461T3 (en) 2012-02-29
WO2006051231A2 (en) 2006-05-18
CA2586414A1 (en) 2006-05-18
US20090008458A1 (en) 2009-01-08
WO2006051231A3 (en) 2006-08-31
BRPI0517712A (en) 2008-10-21
FR2877609A1 (en) 2006-05-12

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