EP0368771B1 - Method and device for decorating a tube - Google Patents

Method and device for decorating a tube Download PDF

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Publication number
EP0368771B1
EP0368771B1 EP89420428A EP89420428A EP0368771B1 EP 0368771 B1 EP0368771 B1 EP 0368771B1 EP 89420428 A EP89420428 A EP 89420428A EP 89420428 A EP89420428 A EP 89420428A EP 0368771 B1 EP0368771 B1 EP 0368771B1
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EP
European Patent Office
Prior art keywords
jaws
tube
pressure
strip
distribution element
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Expired - Lifetime
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EP89420428A
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German (de)
French (fr)
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EP0368771A1 (en
Inventor
Gérard Biboud
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LIBERIA Ets
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LIBERIA Ets
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Priority to AT89420428T priority Critical patent/ATE75664T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus

Definitions

  • the present invention relates to a method of decorating a tube and a device for its implementation.
  • the most common solution consists in carrying out a homogeneous painting on the tube and, possibly, in affixing adhesive decorations covering only part of the surface of the tube.
  • the quality of the decoration obtained is not perfect, and the adhesive elements peel off and reveal traces of particularly unsightly glue.
  • the present invention aims to overcome this gap.
  • the method which it relates to consists in applying, on the tube, a flexible support carrying the decoration to be transferred, in applying around the decoration support a heat distributing element, in applying around the heat distributing element at least one pressure distributing element, and finally to exert a pressure directed from the outside towards the inside on the pressure distributing element.
  • Heat distributors and pressure distributors make it possible to ensure homogeneity both of the heating and of the pressure, although the pressure is exerted by discontinuous elements, namely several heating jaws displaced radially and which can therefore exert a homogeneous distribution of the pressure without a solution of continuity.
  • a device for implementing this method comprises jaws of profile complementary to the exterior surface of the tube, the respective indentations of which are coated with a layer of deformable material, but which transmits pressure, a strip of heat-distributing material being provided. both ends of which are arranged laterally to the device on the same side of the jaws.
  • the layer of pressure distributing material is thicker at the junction lines between two jaws than at the intermediate zones between two junction lines.
  • the pressure distributor element is made of silicone.
  • the strip of heat distributing material is made of polytetrafluoroethylene.
  • the jaws are two in number, and are movable on the same axis to carry out the opening and closing movements
  • the two edges of the strip ensuring the distribution of heat are fixed to two elastically movable elements in a direction parallel to the direction of the jaws, this strip passing behind two rollers of axes parallel to the axis of the tube and each secured to one of the jaws, the two rollers being mounted on the two jaws, so that in the closed position thereof, the two rollers are in contact with each other and that their contact line is contained in the joint plane of the two jaws.
  • the tube In practice, the jaws being in the open position, the tube is brought in laterally, on the side of the heat distribution strip. During this movement, the strip is entrained by the tube and partially encloses the latter. The tube being deposited in the imprint of one of the jaws, it is proceeded to the closing of these, movement during which the two rollers guiding the heat distribution strip come into contact with one another. The tube is therefore perfectly sandwiched between the jaws, and surrounded by the heat distribution strip and the pressure distribution element which ensures homogenization of the pressure exerted by the jaws.
  • the bicycle 2, shown in Figure 1 includes a frame whose tubes have been decorated by a decor transfer process by sublimation. Before the decoration is made, the frame is painted in a homogeneous manner using a color harmonizing with the colors of the desired decoration, and the application of a colorless varnish.
  • This device comprises two heating jaws 3 and 4 each comprising a semi-cylindrical imprint, respectively, 5 and 6 with the diameter of the tube to be decorated.
  • the bottom of each imprint is covered by a half-shell 7 made of silicone, the thickness of which, in the central part, is of the order of 2 mm and the thickness of which at the edges is increased by the order of 1 at 2 tenths of a mm.
  • the device according to the invention also comprises a heat distributing strip 9 whose edges 10 and 12, parallel to the 'axis of the tube to be decorated, are fixed on elastic elements 13 and 14.
  • the two edges 10 and 12 are arranged laterally to the jaws 3 and 4, on the same side thereof.
  • the strip 9 passes in contact with two rollers 15 and 16 secured respectively to the jaws 3 and 4, and fixed thereon so as to come into contact with each other when the jaws are in the closed position, the line of contact located in the joint plane of the jaws.
  • the device being at rest in the state shown in FIG. 2, there is a procedure for producing the decoration of a tube 17 by coating it with the support 18 of a decoration and then by brought from the latter laterally on the side of the strip 9.
  • the strip 9 is driven by the tube 17 and partially encloses the latter.
  • the tube being deposited in the cavity of one of the jaws, for example in the cavity 6 of the jaw 4, the two jaws are closed.
  • This technique makes it possible to perfectly carry out very varied decorations of a tube by sublimation transfer, thanks to the excellent distribution of the temperature, on the one hand, and of the pressure on the other hand, which is obtained despite the exercise pressure using elements of discontinuous structure.

Abstract

This method involves applying to the tube (17) a flexible support (18) carrying the decoration to be transferred, laying a heat distribution element (9) around the decoration support, laying at least one pressure distribution element (7) round the heat distribution element, and finally exerting a pressure directed from the outside inwards on the pressure distribution element. <IMAGE>

Description

La présente invention a pour objet un procédé de décoration d'un tube et un dispositif pour sa mise en oeuvre.The present invention relates to a method of decorating a tube and a device for its implementation.

Il est souvent nécessaire de réaliser la décoration de la surface extérieure de tubes pour leur donner un aspect attractif. Tel est notamment le cas des tubes cylindriques qui sont utilisés pour la réalisation des cadres de bicyclettes.It is often necessary to decorate the outer surface of tubes to give them an attractive appearance. This is particularly the case of cylindrical tubes which are used for the production of bicycle frames.

La solution la plus courante consiste à réaliser sur le tube une peinture homogène et, éventuellement, à apposer des décors adhésifs recouvrant seulement une partie de la surface du tube. Toutefois, la qualité du décor obtenu n'est pas parfaite, et les éléments adhésifs se décollent et laissent apparaître des traces de colle particulièrement inesthétiques.The most common solution consists in carrying out a homogeneous painting on the tube and, possibly, in affixing adhesive decorations covering only part of the surface of the tube. However, the quality of the decoration obtained is not perfect, and the adhesive elements peel off and reveal traces of particularly unsightly glue.

Pour améliorer la décoration, il est connu de combiner sur un même tube plusieurs couleurs, avec réalisation de dégradés, et d'utiliser des peintures pigmentées ou fluorescentes. Toutefois, de telles techniques nécessitent une main d'oeuvre qualifiée ainsi que des temps d'exécution importants, qui augmentent sensiblement le prix de revient du produit fini.To improve the decoration, it is known to combine several colors on the same tube, with gradation, and to use pigmented or fluorescent paints. However, such techniques require skilled labor as well as significant execution times, which significantly increase the cost price of the finished product.

Enfin, quelle que soit la technique utilisée, il n'est pas possible de réaliser des décors très variés.Finally, whatever the technique used, it is not possible to produce very varied decorations.

Par ailleurs, il est connu de réaliser des décors d'autres articles, notamment des skis ou des planches à voile par une opération de transfert par sublimation. Il s'agit d'un transfert gazeux d'un décor à partir d'un support papier sur la surface à décorer sous l'action combinée de la chaleur et de la pression. Cette technique est bien maîtrisée dans la mesure où l'article à décorer est plan, ce qui permet d'exercer une pression homogène sur celui-ci.Furthermore, it is known to produce decorations for other articles, in particular skis or windsurfers by a sublimation transfer operation. It is a gaseous transfer of a decoration from a paper support onto the surface to be decorated under the combined action of heat and pressure. This technique is well mastered insofar as the article to be decorated is flat, which makes it possible to exert a uniform pressure on it.

Compte tenu des impératifs des décorations par transfert par sublimation, cette technique ne semblait pouvoir être appliquée à la décoration d'un tube.Given the requirements of decorations by sublimation transfer, this technique did not seem to be applicable to the decoration of a tube.

La présente invention vise à pallier cette lacune.The present invention aims to overcome this gap.

A cet effet, le procédé qu'elle concerne consiste à appliquer, sur le tube, un support souple portant le décor à transférer, à appliquer autour du support de décor un élément répartiteur de chaleur, à appliquer autour de l'élément répartiteur de chaleur au moins un élément répartiteur de pression, et enfin à exercer une pression dirigée de l'extérieur vers l'intérieur sur l'élément répartiteur de pression.To this end, the method which it relates to consists in applying, on the tube, a flexible support carrying the decoration to be transferred, in applying around the decoration support a heat distributing element, in applying around the heat distributing element at least one pressure distributing element, and finally to exert a pressure directed from the outside towards the inside on the pressure distributing element.

Les éléments répartiteurs de chaleur et répartiteurs de pression permettent d'assurer une homogénéité tant du chauffage que de la pression, quoique la pression soit exercée par des éléments discontinus, à savoir plusieurs mâchoires de chauffage déplacées radialement et quine peuvent donc exercer une répartition homogène de la pression sans solution de continuité.Heat distributors and pressure distributors make it possible to ensure homogeneity both of the heating and of the pressure, although the pressure is exerted by discontinuous elements, namely several heating jaws displaced radially and which can therefore exert a homogeneous distribution of the pressure without a solution of continuity.

Un dispositif pour la mise en oeuvre de ce procédé comprend des mâchoires de profil complémentaire de la surface extérieure du tube dont les empreintes respectives sont revêtues d'une couche de matière déformable, mais transmettant la pression, une bande de matériau répartiteur de chaleur étant prévue dont les deux extrémités sont disposées latéralement à l'appareil du même côté des mâchoires.A device for implementing this method comprises jaws of profile complementary to the exterior surface of the tube, the respective indentations of which are coated with a layer of deformable material, but which transmits pressure, a strip of heat-distributing material being provided. both ends of which are arranged laterally to the device on the same side of the jaws.

Avantageusement, la couche de matériau répartiteur de pression est plus épaisse au niveau des lignes de jonction entre deux mâchoires qu'au niveau des zones intermédiaires entre deux lignes de jonction.Advantageously, the layer of pressure distributing material is thicker at the junction lines between two jaws than at the intermediate zones between two junction lines.

Selon une forme de réalisation de ce dispositif, l'élément répartiteur de pression est réalisé en silicone.According to one embodiment of this device, the pressure distributor element is made of silicone.

Conformément à une autre caractéristique de l'invention, la bande de matériau répartiteur de chaleur est réalisée en polytétrafluoréthylène.According to another characteristic of the invention, the strip of heat distributing material is made of polytetrafluoroethylene.

Selon une forme d'exécution de ce dispositif, dans la mesure où les mâchoires sont au nombre de deux, et sont déplaçables sur un même axe pour réaliser les mouvements d'ouverture et de fermeture, les deux bords de la bande assurant la répartition de chaleur sont fixés à deux éléments déplaçables élastiquement dans une direction parallèle à la direction des mâchoires, cette bande passant derrière deux rouleaux d'axes parallèles à l'axe du tube et solidaires chacun de l'une des mâchoires, les deux rouleaux étant montés sur les deux mâchoires, de telle sorte qu'en position fermée de celles-ci, les deux rouleaux soient en contact l'un de l'autre et que leur ligne de contact soit contenue dans le plan de joint des deux mâchoires.According to one embodiment of this device, insofar as the jaws are two in number, and are movable on the same axis to carry out the opening and closing movements, the two edges of the strip ensuring the distribution of heat are fixed to two elastically movable elements in a direction parallel to the direction of the jaws, this strip passing behind two rollers of axes parallel to the axis of the tube and each secured to one of the jaws, the two rollers being mounted on the two jaws, so that in the closed position thereof, the two rollers are in contact with each other and that their contact line is contained in the joint plane of the two jaws.

En pratique, les mâchoires étant en position ouverte, il est procédé à l'amenée du tube latéralement, du côté de la bande répartitrice de chaleur. Au cours de ce mouvement, la bande est entraînée par le tube et enserre partiellement celui-ci. Le tube étant déposé dans l'empreinte de l'une des mâchoires, il est procédé à la fermeture de celles-ci, mouvement au cours duquel les deux rouleaux guidant la bande répartitrice de chaleur viennent au contact l'un de l'autre. Le tube se trouve donc parfaitement enserré entre les mâchoires, et entouré de la bande répartitrice de chaleur et de l'élément répartiteur de pression qui assure une homogénéisation de la pression exercée par les mâchoires.In practice, the jaws being in the open position, the tube is brought in laterally, on the side of the heat distribution strip. During this movement, the strip is entrained by the tube and partially encloses the latter. The tube being deposited in the imprint of one of the jaws, it is proceeded to the closing of these, movement during which the two rollers guiding the heat distribution strip come into contact with one another. The tube is therefore perfectly sandwiched between the jaws, and surrounded by the heat distribution strip and the pressure distribution element which ensures homogenization of the pressure exerted by the jaws.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, des tubes décorés à l'aide de ce procédé ainsi qu'un dispositif pour la mise en oeuvre de ce procédé :

  • Figure 1 est une vue en perspective d'une bicyclette dont les tubes du cadre sont décorés par le procédé selon l'invention ;
  • Figures 2 à 4 sont trois vues très schématiques en coupe transversale du dispositif pour la mise en oeuvre de ce procédé, au cours de trois phases de son fonctionnement.
In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended diagrammatic drawing representing, by way of nonlimiting examples, tubes decorated using this method as well as a device for implementing this process:
  • Figure 1 is a perspective view of a bicycle whose frame tubes are decorated by the method according to the invention;
  • Figures 2 to 4 are three very schematic views in cross section of the device for the implementation of this method, during three phases of its operation.

La bicyclette 2, représentée à la figure 1, comprend un cadre dont les tubes ont été décorés par un procédé de transfert de décor par sublimation. Avant la réalisation du décor, il est procédé à la peinture de façon homogène du cadre à l'aide d'une couleur s'harmonisant avec les couleurs du decor souhaité, et à l'application d'un vernis incolore.The bicycle 2, shown in Figure 1, includes a frame whose tubes have been decorated by a decor transfer process by sublimation. Before the decoration is made, the frame is painted in a homogeneous manner using a color harmonizing with the colors of the desired decoration, and the application of a colorless varnish.

Les différents tubes constitutifs du cadre de cette bicyclette sont décorés à l'aide du dispositif représenté aux figures 2 à 4.The different tubes making up the frame of this bicycle are decorated using the device shown in Figures 2 to 4.

Ce dispositif comprend deux mâchoires chauffantes 3 et 4 comportant chacune une empreinte semi-cylindrique, respectivement, 5 et 6 au diamètre du tube à décorer. Le fond de chaque empreinte est recouvert par une demi-coquille 7 en silicone dont l'épaisseur, dans la partie centrale, est de l'ordre de 2 mm et dont l'épaisseur au niveau des bords est augmentée de l'ordre de 1 à 2 dixièmes de mm.This device comprises two heating jaws 3 and 4 each comprising a semi-cylindrical imprint, respectively, 5 and 6 with the diameter of the tube to be decorated. The bottom of each imprint is covered by a half-shell 7 made of silicone, the thickness of which, in the central part, is of the order of 2 mm and the thickness of which at the edges is increased by the order of 1 at 2 tenths of a mm.

Ces deux mâchoires 3 et 4 sont déplaçables l'une relativement à l'autre, dans la direction désignée par la référence 8. Le dispositif selon l'invention comprend également une bande 9 répartitrice de chaleur dont les bords 10 et 12, parallèles à l'axe du tube à décorer, sont fixés sur des éléments élastiques 13 et 14.These two jaws 3 and 4 are movable relative to each other, in the direction designated by the reference 8. The device according to the invention also comprises a heat distributing strip 9 whose edges 10 and 12, parallel to the 'axis of the tube to be decorated, are fixed on elastic elements 13 and 14.

Les deux bords 10 et 12 sont disposés latéralement aux mâchoires 3 et 4, du même côté de celles-ci. La bande 9 passe au contact de deux rouleaux 15 et 16 solidaires respectivement des mâchoires 3 et 4, et fixés sur celles-ci de façon à venir en contact l'un avec l'autre lorsque les mâchoires sont en position fermée, la ligne de contact se trouvant dans le plan de joint des mâchoires.The two edges 10 and 12 are arranged laterally to the jaws 3 and 4, on the same side thereof. The strip 9 passes in contact with two rollers 15 and 16 secured respectively to the jaws 3 and 4, and fixed thereon so as to come into contact with each other when the jaws are in the closed position, the line of contact located in the joint plane of the jaws.

En pratique, le dispositif se trouvant au repos dans l'état représenté à la figure 2, il est procédé, pour réaliser le décor d'un tube 17 au revêtement de celui-ci par le support 18 d'un décor puis à l'amenée de celui-ci latéralement du côté de la bande 9. Au cours de ce mouvement, la bande 9 est entraînée par le tube 17 et enserre partiellement celui-ci. Le tube étant déposé dans l'empreinte de l'une des mâchoires, par exemple dans l'empreinte 6 de la mâchoire 4, il est procédé à la fermeture des deux mâchoires.In practice, the device being at rest in the state shown in FIG. 2, there is a procedure for producing the decoration of a tube 17 by coating it with the support 18 of a decoration and then by brought from the latter laterally on the side of the strip 9. During this movement, the strip 9 is driven by the tube 17 and partially encloses the latter. The tube being deposited in the cavity of one of the jaws, for example in the cavity 6 of the jaw 4, the two jaws are closed.

Au cours de ce mouvement, les deux rouleaux 15 et 16 se rapprochent l'un de l'autre, forçant avec les mâchoires 3 et 4, la bande 9 à enserrer parfaitement le tube 17, comme montré à la figure 4.During this movement, the two rollers 15 and 16 approach each other, forcing with the jaws 3 and 4, the strip 9 to perfectly enclose the tube 17, as shown in FIG. 4.

Cette technique permet de réaliser parfaitement des décorations très variées d'un tube par transfert par sublimation, grâce à l'excellente répartition de la température, d'une part, et de la pression d'autre part, qui est obtenue malgré l'exercice d'une pression à l'aide d'éléments de structure discontinue.This technique makes it possible to perfectly carry out very varied decorations of a tube by sublimation transfer, thanks to the excellent distribution of the temperature, on the one hand, and of the pressure on the other hand, which is obtained despite the exercise pressure using elements of discontinuous structure.

Comme il va de soi, l'invention ne se limite pas au seul mode de mise en oeuvre de ce procédé, ni au seul dispositif décrits ci-dessus à titre d'exemples ; elle en embrasse, au contraire, toutes les variantes.It goes without saying that the invention is not limited to the sole mode of implementing this method, nor to the single device described above by way of examples; on the contrary, it embraces all its variants.

Claims (6)

1. Method for decorating a tube, characterised in that it consists of applying, to the tube (17), a flexible backing (18) bearing the decoration to be transferred, applying around the decoration backing a heat distribution element (9), applying around the distribution element at least one pressure distribution element (7), and finally exerting a pressure directed from the outside towards the inside on the pressure distribution element.
2. Device for implementing the method according to claim 1, characterised in that it comprises jaws (3, 4), with a profile complementary to the external surface of the tube, whose respective cavities (5, 6) are covered with a layer of material (7) which is deformable but which transmits pressure, a strip (9) of heat distribution material being provided, whose two ends (10, 12) are disposed laterally to the apparatus on the same side of the jaws.
3. Device according to claim 2, characterised in that the layer of pressure distribution material (7) is thicker at the joining lines between two jaws (3, 4) than at the intermediate areas between two joining lines.
4. Device according to either one of claims 2 and 3, characterised in that the pressure distribution element (7) is made from silicone.
5. Device according to any one of claims 2 to 4, characterised in that the strip (9) of heat distribution material is made from polytetrafluoroethylene.
6. Device according to any one of claims 2 to 5, characterised in that, since the jaws (3, 4) are two in number and are movable on the same axis in order to produce the opening and closing movements, the two edges (10, 12) of the strip providing the distribution of heat are fixed to two elements (13, 14) movable elastically in a direction parallel to the direction of the jaws, this strip (9) passing behind two rollers (15, 16) with axes parallel to the axis of the tube and each secured to one of the jaws, the two rollers (15, 16) being mounted on the two jaws (3, 4), so that in the closed position of the latter the two rollers are in contact with each other and their line of contact is continuous in the joining plane of the two jaws.
EP89420428A 1988-11-07 1989-11-06 Method and device for decorating a tube Expired - Lifetime EP0368771B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420428T ATE75664T1 (en) 1988-11-07 1989-11-06 METHOD AND EQUIPMENT FOR DECORATING A TUBE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815781 1988-11-07
FR8815781A FR2638682B1 (en) 1988-11-07 1988-11-07 PROCESS FOR DECORATING A TUBE AND DEVICE FOR IMPLEMENTING SAME

Publications (2)

Publication Number Publication Date
EP0368771A1 EP0368771A1 (en) 1990-05-16
EP0368771B1 true EP0368771B1 (en) 1992-05-06

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Application Number Title Priority Date Filing Date
EP89420428A Expired - Lifetime EP0368771B1 (en) 1988-11-07 1989-11-06 Method and device for decorating a tube

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EP (1) EP0368771B1 (en)
AT (1) ATE75664T1 (en)
DE (1) DE68901447D1 (en)
ES (1) ES2030998T3 (en)
FR (1) FR2638682B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA986563B (en) * 1998-07-23 1998-10-28 Lin Juen Chyr Method for coloring a bicycle part

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608480A (en) * 1970-02-17 1971-09-28 Patent Dev Corp Hot stamping and heat transfer press for rollable objects
US3910183A (en) * 1974-02-28 1975-10-07 Parke Davis & Co Apparatus for offset printing capsules
FR2273671A1 (en) * 1974-06-07 1976-01-02 Whiley Ltd George TRANSFER DEVICE
US4052935A (en) * 1975-11-12 1977-10-11 Minnesota Mining And Manufacturing Company Printing device
GB2120169B (en) * 1982-05-12 1985-10-23 David Durand Method of applying a dye image to a plastic member and the image bearing member thereby formed
DE3421029C2 (en) * 1984-06-06 1986-04-24 Walter Steinhausen Mathis Method and device for dry printing on a workpiece using a hot stamping foil
EP0183440B1 (en) * 1984-11-15 1991-08-21 Ajinomoto Co., Inc. Transfer printing

Also Published As

Publication number Publication date
ATE75664T1 (en) 1992-05-15
EP0368771A1 (en) 1990-05-16
FR2638682B1 (en) 1990-12-14
ES2030998T3 (en) 1992-11-16
FR2638682A1 (en) 1990-05-11
DE68901447D1 (en) 1992-06-11

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