WO2001081084A1 - Method for making an engraved plate for hot marking reproduction, and resulting engraved plate - Google Patents

Method for making an engraved plate for hot marking reproduction, and resulting engraved plate Download PDF

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Publication number
WO2001081084A1
WO2001081084A1 PCT/FR2001/001334 FR0101334W WO0181084A1 WO 2001081084 A1 WO2001081084 A1 WO 2001081084A1 FR 0101334 W FR0101334 W FR 0101334W WO 0181084 A1 WO0181084 A1 WO 0181084A1
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WO
WIPO (PCT)
Prior art keywords
engraved
plate
engraved plate
layer
silicone elastomer
Prior art date
Application number
PCT/FR2001/001334
Other languages
French (fr)
Inventor
Daniel Ehanno
Original Assignee
Gravure Et Precision Ayant Pour Sigle Gep
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 Gravure Et Precision Ayant Pour Sigle Gep filed Critical Gravure Et Precision Ayant Pour Sigle Gep
Priority to EP01929766A priority Critical patent/EP1276613A1/en
Priority to AU2001256452A priority patent/AU2001256452A1/en
Publication of WO2001081084A1 publication Critical patent/WO2001081084A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0415—Ornamental plaques, e.g. decorative panels, decorative veneers containing metallic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/005—Removing selectively parts of at least the upper layer of a multi-layer article

Definitions

  • the present invention relates to the field of reproduction by hot stamping, a method of manufacturing an engraved plate, and an engraved plate obtained by the implementation of said method.
  • the tools used traditionally consist of an engraved plate comprising a metallic sole on which a layer of silicone elastomer is attached by bonding. free side shows the engraving of the motif to be reproduced.
  • the silicone elastomer is loaded with thermally conductive particles.
  • the object of the present invention is to propose a method of manufacturing an engraved plate and the engraved plate obtained by the implementation of said method, making it possible to remedy the various aforementioned drawbacks, in particular by limiting the number of operations required and thereby reducing manufacturing costs.
  • the process for manufacturing an engraved plate in the field of reproduction by hot stamping according to the invention is essentially characterized in that it consists in applying a layer of silicone elastomer or the like on a metal plate, then etching the imprint of the pattern to be reproduced in said layer of silicone elastomer or the like by means of a laser etching technique.
  • the laser engraving technique used in the process according to the invention is chosen from already known techniques, such as for example those used in the printing field for engraving intermediate inking rollers or rollers or plates rotogravure, or flexographic printing plates.
  • the assembly consisting of the plate and the silicone layer is cut to the desired dimension.
  • An engraved plate obtained by the manufacturing method according to the invention is essentially characterized in that it comprises a metal plate covered with a layer of elastomer. sili ⁇ one- ⁇ or the like in which the imprint of the motif to be reproduced is engraved, by means of a laser engraving technique.
  • the layer of silicone elastomer or the like is loaded with heat-conducting particles.
  • loaded elastomers are also used, but only to improve the mechanical qualities of the impression, whereas, according to the invention, "in the silicone elastomer or the like, the filler is used for thermal conductivity reasons.
  • the metal plate is made of steel.
  • the imprint has flanks having a progressive profile.
  • Figures la, lb, le and Id represent diagrams illustrating different stages of the manufacturing process of a hot stamping tool traditionally used.
  • Figures 2a and 2b show schematic views illustrating the method of manufacturing an engraved plate 1 according to the invention.
  • the first step in manufacturing a tool for hot stamping consists in machining in a metal plate 1 the positive 10 of an image 2 to be reproduced.
  • the next step shown in FIG. 1b, consists in using the metal plate 1 to manufacture a bakelite mold 3, in order to obtain a negative impression 30 of the image 2.
  • a molded silicone elastomer 4 is poured into the mold 3, with a view to obtaining a plate 40 comprising a positive 41 of image 2.
  • the plate 40 is glued to a sole 5 made of metal such as steel, which makes it possible to obtain the hot engraving tool.
  • a sole 5 made of metal such as steel, which makes it possible to obtain the hot engraving tool.
  • Figures 2a and 2b it can be seen that according to the invention, .. on. apply a layer 6 of silicone elastomer or the like on a metal plate 7, then, by means of a laser 8, the face 60 of the layer 6 is machined in order to obtain an imprint 61.
  • the method of manufacturing an engraved plate according to the invention is less long and less expensive than the existing method described above. It requires less labor and makes it possible to produce engraved plates of large dimensions.
  • the laser engraving technique advantageously makes it possible to produce imprints whose sides have a progressive profile capable of better resisting the pressure of the marking, a profile which is impossible to obtain by conventional machining.

Abstract

The invention concerns a method for making an engraved plate for reproduction by hot marking, and the resulting engraved plate. The method consists in applying a silicone elastomer layer or the like on the metal plate, then in engraving the impression of the pattern to be reproduced in the silicone elastomer layer, using a laser engraving technique. The engraved plate comprises a metal plate (7) coated with a layer (6) of silicone elastomer or the like wherein is engraved the impression (61) of the pattern to be reproduced.

Description

PROCEDE DE FABRICATION D'UNE PLAQUE GRAVEE POUR LA REPRODUCTION PAR MARQUAGE A CHAUD, ET PLAQUE GRAVEE OBTENUE.PROCESS FOR PRODUCING AN ENGRAVED PLATE FOR REPRODUCTION BY HOT MARKING, AND ENGRAVED PLATE OBTAINED.
La présente invention a pour objet dans le domaine de la reproduction par marquage à chaud, un procédé de fabrication d'une plaque gravée, et une plaque gravée obtenue par la mise en œuvre dudit procédé .The present invention relates to the field of reproduction by hot stamping, a method of manufacturing an engraved plate, and an engraved plate obtained by the implementation of said method.
Dans le domaine de la reproduction par marquage à chaud, notamment pour un marquage à chaud sur une matière plastique, les outils utilisés consistent traditionnellement en une plaque gravée comportant une semelle métallique sur laquelle est rapportée par collage une couche d'élastomère de silicone dont la face libre présente la gravure du motif à reproduire.In the field of reproduction by hot stamping, in particular for hot stamping on a plastic material, the tools used traditionally consist of an engraved plate comprising a metallic sole on which a layer of silicone elastomer is attached by bonding. free side shows the engraving of the motif to be reproduced.
Par ailleurs , afin d' améliorer les caractéristiques de conductivité thermique de l'élastomère de silicone, celui-ci est chargé de particules thermo-conductrices .Furthermore, in order to improve the thermal conductivity characteristics of the silicone elastomer, it is loaded with thermally conductive particles.
La réalisation d'un tel outil nécessite plusieurs opérations successives à savoir :The production of such a tool requires several successive operations, namely:
- reproduction par usinage mécanique sur une pièce métallique du positif du motif à reproduire,- reproduction by mechanical machining of the positive of the motif to be reproduced on a metal part,
- réalisation d'un moule en bakélite de l'empreinte en négatif,- realization of a bakelite mold of the imprint in negative,
- moulage d'une pièce en élastomère de silicone chargé dans le moule en bakélite,- molding of a piece of silicone elastomer loaded in the bakelite mold,
- collage de la pièce d'élastomère de silicone sur une matrice en métal .- bonding of the silicone elastomer part on a metal matrix.
Du fait de toutes ces opérations, ce procédé de réalisation d'un tel outil est très onéreux, et notamment lorsque, pour une modification du motif à reproduire, il est nécessaire de les refaire toutes .Because of all these operations, this method of producing such a tool is very expensive, and in particular when, for a modification of the pattern to be reproduced, it is necessary to redo them all.
La présente invention a pour but de proposer un procédé de fabrication d'une plaque gravée et la plaque gravée obtenue par la mise en œuvre dudit procédé, permettant de remédier aux divers inconvénients précités, en limitant notamment le nombre des opérations nécessaires et par là même en réduisant les coûts de fabrication.The object of the present invention is to propose a method of manufacturing an engraved plate and the engraved plate obtained by the implementation of said method, making it possible to remedy the various aforementioned drawbacks, in particular by limiting the number of operations required and thereby reducing manufacturing costs.
Le procédé de fabrication d'une plaque gravée dans le domaine de la reproduction par marquage à chaud selon l'invention, se caractérise essentiellement en ce qu' il consiste à appliquer une couche d'élastomère de silicone ou analogue sur une plaque de métal, puis à graver l'empreinte du motif à reproduire dans ladite couche d'élastomère de silicone ou analogue au moyen d'une technique de gravure au laser.The process for manufacturing an engraved plate in the field of reproduction by hot stamping according to the invention is essentially characterized in that it consists in applying a layer of silicone elastomer or the like on a metal plate, then etching the imprint of the pattern to be reproduced in said layer of silicone elastomer or the like by means of a laser etching technique.
La technique de gravure par laser utilisée dans le procédé selon l'invention est choisie parmi les techniques déjà connues, telles que par exemple celles utilisées dans le domaine de l'impression pour graver des rouleaux intermédiaires d'encrage ou des rouleaux ou plaques d'héliogravure, ou des clichés d'impression flexographique.The laser engraving technique used in the process according to the invention is chosen from already known techniques, such as for example those used in the printing field for engraving intermediate inking rollers or rollers or plates rotogravure, or flexographic printing plates.
Selon une caractéristique additionnelle du procédé selon l'invention, après la réalisation de la gravure, on coupe à la dimension voulue l'ensemble constitué de la plaque et de la couche de silicone. π -" •' <According to an additional characteristic of the method according to the invention, after the etching has been carried out, the assembly consisting of the plate and the silicone layer is cut to the desired dimension. π - " • '<
Le procédé de fabrication d'une plaque gravée selon l'invention permet de s'affranchir de nombreuses opérations longues, fastidieuses et coûteuses .The method of manufacturing an engraved plate according to the invention overcomes many long, tedious and costly operations.
II permet de plus de réaliser aisément des plaques gravées de grandes dimensions, ce qui n'est pas toujours possible par le procédé traditionnel du fait de la nécessité de fabriquer un moule .It also makes it possible to easily produce large engraved plates, which is not always possible by the traditional process due to the need to manufacture a mold.
Une plaque gravée obtenue par le procédé de fabrication selon l'invention se caractérise essentiellement en ce qu'elle comprend une plaque métallique recouverte d'une couche d' élastomère de . siliαone-^ou analogue dans laquelle est gravée l'empreinte du motif à reproduire, au moyen d'une technique de gravure par laser.An engraved plate obtained by the manufacturing method according to the invention is essentially characterized in that it comprises a metal plate covered with a layer of elastomer. siliαone- ^ or the like in which the imprint of the motif to be reproduced is engraved, by means of a laser engraving technique.
On connaît déjà dans le domaine de l'impression, et plus particulièrement de l'offset et de la flexographie des clichés comprenant une semelle flexible recouverte d'une couche d'un matériau thermo-sensible gravée au moyen d'une technique de gravure par laser.Already known in the field of printing, and more particularly of offset and flexography of printing plates comprising a flexible sole covered with a layer of heat-sensitive material engraved by means of an engraving technique by laser.
Cependant, ces clichés, de forme cylindrique, ne sont pas adaptés à la reproduction par gravure à chaud, c'est par exemple le cas de celui décrit dans le document DE 19756327, plus particulièrement destiné à l'impression offset.However, these plates, of cylindrical shape, are not suitable for reproduction by hot engraving, this is for example the case of that described in the document DE 19756327, more particularly intended for offset printing.
Selon une caractéristique additionnelle de la plaque gravée selon l'invention, la couche d'élastomère de silicone ou analogue est chargée de particules thermo-conductrices .According to an additional characteristic of the plate engraved according to the invention, the layer of silicone elastomer or the like is loaded with heat-conducting particles.
Dans le domaine de l'impression, notamment la flexographie, on utilise également des - élastomères chargés mais uniquement pour améliorer les qualités mécaniques de l'empreinte, alors que, selon l'invention," dans l' élastomère de silicone ou analogue la charge est utilisée pour des raisons de conductivite thermique.In the printing field, in particular flexography, loaded elastomers are also used, but only to improve the mechanical qualities of the impression, whereas, according to the invention, "in the silicone elastomer or the like, the filler is used for thermal conductivity reasons.
Selon une autre caractéristique additionnelle de la plaque gravée selon l'invention, la plaque de métal est réalisée en acier. Selon une autre caractéristique additionnelle de la plaque gravée selon l'invention, l'empreinte a des flancs présentant un profil progressif.According to another additional characteristic of the plate engraved according to the invention, the metal plate is made of steel. According to another additional characteristic of the plate engraved according to the invention, the imprint has flanks having a progressive profile.
Les avantages et les caractéristiques du dispositif selon l'invention, ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif.The advantages and characteristics of the device according to the invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.
Dans le dessin annexé :In the attached drawing:
Les figures la, lb, le et Id représentent des schématiques illustrant différentes étapes du procédé de fabrication d'un outil de marquage à chaud utilisé traditionnellement.Figures la, lb, le and Id represent diagrams illustrating different stages of the manufacturing process of a hot stamping tool traditionally used.
Les figures 2a et 2b représentent des vues schématiques illustrant le procédé de fabrication d'une plaque gravée selon 1' invention.Figures 2a and 2b show schematic views illustrating the method of manufacturing an engraved plate 1 according to the invention.
En référence à la figure la on peut voir que la première étape de fabrication d'un outil pour le marquage à chaud selon un procédé traditionnel, consiste à usiner dans une plaque métallique 1 le positif 10 d'une image 2 à reproduire.With reference to FIG. 1a, it can be seen that the first step in manufacturing a tool for hot stamping according to a traditional method, consists in machining in a metal plate 1 the positive 10 of an image 2 to be reproduced.
L'étape suivante, représentée sur la figure lb, consiste à utiliser la plaque métallique 1 pour fabriquer un moule 3 en bakélite, afin d'obtenir une empreinte 30 en négatif de l'image 2.The next step, shown in FIG. 1b, consists in using the metal plate 1 to manufacture a bakelite mold 3, in order to obtain a negative impression 30 of the image 2.
En référence à la figure le, on peut voir que dans le moule 3 est coulé un élastomère de silicone chargé 4, en vue d'obtenir une plaque 40 comprenant un positif 41 de l'image 2.With reference to FIG. 1c, it can be seen that a molded silicone elastomer 4 is poured into the mold 3, with a view to obtaining a plate 40 comprising a positive 41 of image 2.
Après, comme cela est visible sur la figure ld, la plaque 40 est collée sur une semelle 5 en métal tel que de l'acier, ce qui permet d'obtenir l'outil de gravure à chaud. En référence maintenant aux figures 2a et 2b, on peut voir que selon l' invention,.. on . applique une couche 6 d'élastomère de silicone ou analogue sur une plaque métallique 7 , puis , au moyen d'un laser 8, on usine la face 60 de la couche 6 afin d'obtenir une empreinte 61.After, as can be seen in FIG. 1d, the plate 40 is glued to a sole 5 made of metal such as steel, which makes it possible to obtain the hot engraving tool. Referring now to Figures 2a and 2b, it can be seen that according to the invention, .. on. apply a layer 6 of silicone elastomer or the like on a metal plate 7, then, by means of a laser 8, the face 60 of the layer 6 is machined in order to obtain an imprint 61.
Le procédé de fabrication d'une plaque gravée selon l'invention est moins long et moins coûteux que le procédé existant précédemment décrit. Il nécessite moins de main d'œuvre et permet de réaliser des plaques gravées de grandes dimensions .The method of manufacturing an engraved plate according to the invention is less long and less expensive than the existing method described above. It requires less labor and makes it possible to produce engraved plates of large dimensions.
Par ailleurs, la technique de gravure laser permet avantageusement de réaliser des empreintes dont les flancs présentent un profil progressif apte à mieux résister à la pression du marquage, profil qu'il est impossible d'obtenir par un usinage classique. Furthermore, the laser engraving technique advantageously makes it possible to produce imprints whose sides have a progressive profile capable of better resisting the pressure of the marking, a profile which is impossible to obtain by conventional machining.

Claims

REVENDICATIONS
1) Procédé de fabrication d'une plaque gravée dans le domaine de la reproduction par marquage à chaud caractérisé en ce qu' il consiste à appliquer une couche d' élastomère de silicone ou analogue sur une plaque de métal, puis à graver l'empreinte du motif à reproduire dans ladite couche d'élastomère de silicone ou analogue, au moyen d'une technique de gravure au laser.1) Method for manufacturing an engraved plate in the field of reproduction by hot stamping, characterized in that it consists in applying a layer of silicone elastomer or the like on a metal plate, then in etching the imprint of the pattern to be reproduced in said layer of silicone elastomer or the like, by means of a laser engraving technique.
2) Procédé de fabrication selon la revendication 1, caractérisé en ce qu'après la réalisation de la gravure, on coupe à la dimension voulue l'ensemble constitué de la plaque et de la couche de silicone ou analogue.2) The manufacturing method according to claim 1, characterized in that after the etching is carried out, the assembly consisting of the plate and the layer of silicone or the like is cut to the desired dimension.
3) Plaque gravée obtenue par le procédé de fabrication selon la revendication 1 ou la revendication 2, caractérisée en ce qu'elle comprend une plaque métallique (7) recouverte d'une couche (6) d'élastomère de silicone ou analogue dans laquelle est gravée l'empreinte (61) du motif à reproduire au moyen d'une technique de gravure par laser.3) Engraved plate obtained by the manufacturing method according to claim 1 or claim 2, characterized in that it comprises a metal plate (7) covered with a layer (6) of silicone elastomer or the like in which is engraved the imprint (61) of the pattern to be reproduced by means of a laser engraving technique.
4) Plaque gravée selon la revendication 1, caractérisée en ce que la couche (6) d'élastomère de silicone ou analogue est chargée de particules thermo-conductrices.4) Engraved plate according to claim 1, characterized in that the layer (6) of silicone elastomer or the like is loaded with thermally conductive particles.
5) Plaque gravée selon la revendication 3 ou la revendication 4, caractérisée en ce que la plaque de métal (7) est réalisée en acier.5) Engraved plate according to claim 3 or claim 4, characterized in that the metal plate (7) is made of steel.
6) Plaque gravée selon l'une quelconque des revendications 3 à 5, caractérisée en ce que l'empreinte (61) a des flancs présentant un profil progressif. 6) Engraved plate according to any one of claims 3 to 5, characterized in that the imprint (61) has flanks having a progressive profile.
PCT/FR2001/001334 2000-04-27 2001-04-27 Method for making an engraved plate for hot marking reproduction, and resulting engraved plate WO2001081084A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01929766A EP1276613A1 (en) 2000-04-27 2001-04-27 Method for making an engraved plate for hot marking reproduction, and resulting engraved plate
AU2001256452A AU2001256452A1 (en) 2000-04-27 2001-04-27 Method for making an engraved plate for hot marking reproduction, and resulting engraved plate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0005383A FR2808240B1 (en) 2000-04-27 2000-04-27 METHOD FOR MANUFACTURING AN ENGRAVED PLATE FOR REPRODUCTION BY HOT MARKING, AND ENGRAVED PLATE OBTAINED
FR00/05383 2000-04-27

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PCT/FR2001/001334 WO2001081084A1 (en) 2000-04-27 2001-04-27 Method for making an engraved plate for hot marking reproduction, and resulting engraved plate

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EP (1) EP1276613A1 (en)
AU (1) AU2001256452A1 (en)
FR (1) FR2808240B1 (en)
WO (1) WO2001081084A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1640129A2 (en) * 2004-09-21 2006-03-29 Tosi S.p.A. Method for obtaining relief decorations on ceramic tiles

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US5353705A (en) * 1992-07-20 1994-10-11 Presstek, Inc. Lithographic printing members having secondary ablation layers for use with laser-discharge imaging apparatus
JPH0986062A (en) * 1995-09-21 1997-03-31 Toray Ind Inc Direct drawing type waterless planographic printing base plate
DE19756327A1 (en) * 1997-12-18 1999-07-01 Polywest Kunststofftechnik Mold for rotary printing, coating or embossing of sheet-like materials and method for producing the mold
US5924364A (en) * 1997-01-17 1999-07-20 Agfa-Gevaert N.V. Laser-imagable recording material and printing plate produced therefrom for waterless offset printing

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DE4324970C2 (en) * 1993-07-24 1995-06-14 Benecke Kaliko Ag Process for producing an embossing roller for continuously embossing the surface of a thermoplastic film with a pattern

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Publication number Priority date Publication date Assignee Title
US5353705A (en) * 1992-07-20 1994-10-11 Presstek, Inc. Lithographic printing members having secondary ablation layers for use with laser-discharge imaging apparatus
JPH0986062A (en) * 1995-09-21 1997-03-31 Toray Ind Inc Direct drawing type waterless planographic printing base plate
US5924364A (en) * 1997-01-17 1999-07-20 Agfa-Gevaert N.V. Laser-imagable recording material and printing plate produced therefrom for waterless offset printing
DE19756327A1 (en) * 1997-12-18 1999-07-01 Polywest Kunststofftechnik Mold for rotary printing, coating or embossing of sheet-like materials and method for producing the mold

Non-Patent Citations (2)

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Title
DATABASE WPI Section Ch Week 199723, Derwent World Patents Index; Class A06, AN 1997-254399, XP002156995 *
See also references of EP1276613A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1640129A2 (en) * 2004-09-21 2006-03-29 Tosi S.p.A. Method for obtaining relief decorations on ceramic tiles
EP1640129A3 (en) * 2004-09-21 2007-05-02 Tosi S.p.A. Method for obtaining relief decorations on ceramic tiles

Also Published As

Publication number Publication date
AU2001256452A1 (en) 2001-11-07
EP1276613A1 (en) 2003-01-22
FR2808240B1 (en) 2003-03-07
FR2808240A1 (en) 2001-11-02

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