EP2105808A1 - Dial for a timepiece - Google Patents

Dial for a timepiece Download PDF

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Publication number
EP2105808A1
EP2105808A1 EP08005729A EP08005729A EP2105808A1 EP 2105808 A1 EP2105808 A1 EP 2105808A1 EP 08005729 A EP08005729 A EP 08005729A EP 08005729 A EP08005729 A EP 08005729A EP 2105808 A1 EP2105808 A1 EP 2105808A1
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EP
European Patent Office
Prior art keywords
dial
layer
inscriptions
timepiece
layers
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.)
Granted
Application number
EP08005729A
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German (de)
French (fr)
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EP2105808B1 (en
Inventor
Christian Selmoni
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.)
Richemont International SA
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Richemont International SA
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.)
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Publication date
Application filed by Richemont International SA filed Critical Richemont International SA
Priority to EP20080005729 priority Critical patent/EP2105808B1/en
Priority to DE200860004989 priority patent/DE602008004989D1/en
Publication of EP2105808A1 publication Critical patent/EP2105808A1/en
Application granted granted Critical
Publication of EP2105808B1 publication Critical patent/EP2105808B1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/065—Dials with several parts
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0015—Light-, colour-, line- or spot-effects caused by or on stationary parts

Definitions

  • the present invention relates to a dial for a timepiece such as a wristwatch.
  • a watch dial has a number of inscriptions. These inscriptions generally include at least indications or markers of the hours, in the form of a graduation, indexes, figures, etc. and the manufacturer's mark. Other inscriptions may be provided, such as minutes, seconds, date, power reserve, etc. All these inscriptions take place of course on the dial and it is not always easy to arrange them sufficiently readable given the available surface.
  • the present invention aims to provide a dial which may include an increased amount of inscriptions and which may include including additional inscriptions related to security, having a very high resolution, and / or producing an aesthetic effect.
  • a dial for a timepiece characterized in that it comprises first and second transparent layers made of different materials and inscriptions provided on at least one surface of each of these layers.
  • first and second layers are made of different materials allows the use of different inscription techniques for these two layers, adapted to the respective materials, to promote the distinction, readability and accuracy of the inscriptions.
  • inscriptions are provided on both surfaces of at least one of the layers.
  • the inscriptions of at least one of the layers comprise indications permitting the reading of information in cooperation with at least one mobile indicator member of the timepiece.
  • These indications are for example numbers, indexes or graduations.
  • the inscriptions of at least one of the layers may comprise security information, in the form of, for example, at least one micro-text and / or at least one drawing.
  • This information may be visible or invisible.
  • invisible it is meant that this information can not be seen under normal lighting conditions but becomes visible under specific conditions, for example when illuminated by ultraviolet light.
  • the dial may comprise at least one transparent zone to make visible at least a part of a mechanism, such as the movement, of the timepiece. Particular optical effects can be produced, for aesthetic purposes, by varying the way in which the light transmitted through the dial interacts with decorated parts of the mechanism.
  • one of the first and second layers is made of a material that is more rigid than that of the other layer.
  • the inscriptions provided on the layer of a more rigid material may comprise inscriptions formed by metal deposition and / or etching.
  • the inscriptions provided on the other layer may comprise inscriptions formed by printing, for example by the technique of offset or intaglio, and therefore if desired in a higher resolution than those achievable with the processes. of inscription usable on the layer in a more rigid material.
  • the layer of a more rigid material is for example mineral glass or sapphire, preferably sapphire, and the other layer of polymer, preferably polypropylene.
  • the layers are typically attached to each other by means of a transparent adhesive.
  • the present invention also proposes a timepiece comprising a box and a dial as defined above, the dial being surrounded and held in the box by a seal.
  • the seal is constrained so that one of its ends is folded and folded against the dial to tighten the dial against a support part of the timepiece.
  • a dial 1 for a timepiece is formed of two layers 2, 3 assembled to each other.
  • the first layer 2, or upper layer is intended to be located on the side of the indicator needles of the timepiece. It comprises an upper face 4 and a lower face 5.
  • the second layer 3, or lower layer is intended to be located on the movement side of the timepiece. It comprises an upper face 6 and a lower face 7.
  • the layers 2, 3 are made of different respective materials but both transparent.
  • transparent is meant a material which allows the visible light to pass at least partially (preferably at a level of at least 50%).
  • the first layer 2 is made of a rigid material. It is this layer 2 which gives rigidity and strength to the dial 1.
  • the second layer 3 is made of a flexible material.
  • the layers 2, 3 are assembled by means of a transparent adhesive layer (not visible in the drawings), located between the lower face 5 of the first layer 2 and the upper face 6 of the second layer 3 .
  • Each of the layers 2, 3 bears inscriptions on at least one of its faces 4, 5, respectively 6, 7.
  • the inscriptions on the first layer 2, made of rigid material, are typically made by metal deposition, for example by galvanic growth, or by etching, for example by laser etching.
  • the inscriptions on the second layer 3, of flexible material, they are typically made by printing, for example by the technique of offset or intaglio (intaglio).
  • the first layer 2 is made of mineral glass or sapphire, preferably sapphire because of the good mechanical strength and the scratch resistance of this material
  • the second layer 3 is in polymer, preferably polypropylene, more preferably bi-oriented polypropylene (BOPP).
  • the mineral glass, and even more the sapphire, lend themselves to metal deposition and etching techniques.
  • Polymers, in particular polypropylene, are well suited to printing techniques. The polymers are indeed generally sufficiently flexible to pass through rotary printing machines and generally have good adhesion for fixing the ink. Highly accurate printing techniques, currently used in the manufacture of bank notes and secure documents, can be used to record information, including security information, on the polymer layer 3.
  • At least one of the two faces 6, 7 of the polymer layer 3, intended to be printed may be coated with a coating.
  • transparent polymers are generally less transparent than mineral glass or sapphire
  • the polymer layer 3 is preferably less thick than the mineral or sapphire glass layer 2, as shown.
  • the first layer 2 has a thickness of 0.5 mm and the second layer 3 has a thickness of 0.1 mm.
  • Conferring layer 3 a small thickness further increases its flexibility and thus facilitates the printing of surfaces 6, 7.
  • An example of a polymer film particularly suitable for forming layer 3 is Rayoart TM CGS film marketed by the company Innovia Films.
  • FIG. 2 to 5 An exemplary embodiment is illustrated in Figures 2 to 5 .
  • the second layer 3 consist solely of printing ink.
  • the upper face 6 of this layer 3 is smooth, as the lower face 5 of the first layer 2, which facilitates the bonding of the faces 5, 6 against each other.
  • the upper face 4 of the first layer 2 carries, in the example shown, inscriptions formed by laser engraving, such as numbers 8 hours, indications 9, 10 dates and days of the week, and indications 11 relating to the manufacturer's mark.
  • the depressions formed in the sapphire by the etching are preferably filled with ink, for example by means of a syringe, to make visible the indications 8 to 11, then the surface 4 is polished.
  • Other inscriptions, such as indications 12, are for example engraved but not filled with ink.
  • Other inscriptions, such as micro-texts 13 and a drawing 14, are made by metal deposition, for example by galvanic growth, with more or less relief.
  • the upper face 6 of the second layer 3 carries, in the example shown, a decoration 15, here formed by radial lines, a scale 16 intended to allow reading of information, here the power reserve, in cooperation with a movable indicator needle above the dial 1, and a geometrical figure or figure, such as a dot or disc 17, formed by invisible ink, that is to say typically ink which is visible only under ultraviolet.
  • the drawing 17 may be placed on the surface 6 in the same position as the drawing 14 on the surface 4 and the drawings 14, 17 may have the same dimension.
  • the inscriptions 15, 16, 17 are made for example by a printing technique of the offset or intaglio type, preferably intaglio.
  • the lower face 7 of the second layer 3 carries, in the example shown, a decor comprising a cross frame 18 and several groups of concentric circles 19.
  • a disc 20 without inscriptions is arranged to make visible a specific part of the movement.
  • the decoration 18, 19 is made for example by offset or intaglio, preferably intaglio.
  • the figure 5 shows the dial 1 in plan view formed of the two layers 2, 3 with the inscriptions illustrated in FIGS. Figures 2 to 4 .
  • the micro-texts 13 and the decorations 15, 18, 19, by their precision and fineness, constitute security information for authenticating the timepiece.
  • Invisible ink design 17 also constitutes such security information. Thanks to the different surfaces 4, 6, 7 which bear inscriptions, and which are separated only by transparent material, the dial 1 can comprise a large number of inscriptions, the distinction between the inscriptions of different surfaces being made by the effect of depth and by the different visual effects produced by the different registration techniques employed for layers 2 and 3.
  • the mineral glass or sapphire layer 2 and the polymer layer 3 could be reversed.
  • One or more other transparent layers could be added.
  • the dial 1 could be formed of two layers of mineral or sapphire glass sandwiching a polymer layer.
  • the box of the timepiece comprises a telescope 21 in which is fixed a mirror 22, a circle 23 receiving the movement, designated 24, a bottom 25 provided with an ice 26 and a middle part 27 surrounding the circle 23 and fixed between the bezel 21 and the bottom 25.
  • the circle 23 has an upper thread 28 and a thread lower 29 cooperating with respective threads of the telescope 21 and the bottom 25 to fix the circle 23 to the telescope 21 and the bottom 25.
  • the circle 23 has an annular upper face 30 and an annular flange 31 projecting from the periphery of the face 30 and whose outer face defines the thread 28.
  • the face 30 and the flange 31 define an annular housing surrounding the upper part of the movement 24 and in which is placed a support ring 32.
  • the dial assembly 1 and support ring 32 is held axially (vertically) and laterally by an annular seal 33 with an L-shaped cross-section axially compressed between the upper face 30 of the circle 23 and a lower face 34 of a projection. inside the bezel 21 and laterally between the periphery of the dial assembly 1 and the support ring 32 and the flange 33.
  • the horizontal annular portion 35 of the gasket 33 defining the horizontal leg of the L-shaped section, is received in a clearance peripheral ring 36 formed in the lower face of the ring 32 and is thus held between the ring 32 and the circle 23, to position the gasket 33 axially.
  • the face 34 of the telescope 21 has an annular notch 37 which receives the upper annular end 38 of the seal 33, that is to say the end of the vertical branch of the L-shaped section.
  • the notch 37 is defined by two flat surfaces 39, 40 forming an angle between them (cf. figure 7 ).
  • the surface 39 exerts a pressure on the end 38 of the seal 33 during and after the mounting of the telescope 21 on the circle 23 to fold this end 38 towards the inside of the box and thus fold it against the upper face of the dial 1
  • This constrained state of the seal 33 is shown in FIG. figure 7 .
  • the seal 33 is represented not in its actual state, constrained, but in its rest state where the end 38 is right.
  • the surface 40 of the notch 37 constitutes a stop which holds the end 38 of the joint 33 folded.
  • the dial assembly 1 and support ring 32 is thus clamped axially against the upper face 30 of the circle 23 by the gasket 33 itself compressed between the dial 1 and the telescope 21.
  • the dial assembly 1 and the support ring 32 is also clamped laterally against the inner face of the flange 31 via the seal 33, compressed between the assembly 1, 32 and the flange 31. In this way, a good hold of the dial 1 is ensured, without welding or screwing of it- this.
  • the seal 33 also plays the role of shock absorber, particularly lateral, to protect the dial 1.
  • the seal 33 is made of an elastic material such as natural or synthetic rubber.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

The dial (1) has transparent upper and lower layers (2, 3) made of different materials, and markings provided on one of upper and lower faces (6, 7) of the layer (3). The markings are provided on one of upper and lower faces (4, 5) of the layer (2). The markings comprise indications e.g. digits, permitting reading of information in co-operation with an indicating body e.g. needle, of a timepiece. The layer (2) is made of a material more rigid than the other layer (3). The layer (2) is made of mineral glass or sapphire and the other layer (3) is made of biaxially oriented polypropylene. One of transparent layers is formed of Rayoart(RTM: thickest polymer film). An independent claim is also included for a timepiece comprising a case in which a dial is surrounded and held by a seal.

Description

La présente invention concerne un cadran pour une pièce d'horlogerie telle qu'une montre-bracelet.The present invention relates to a dial for a timepiece such as a wristwatch.

Un cadran d'horlogerie comporte un certain nombre d'inscriptions. Ces inscriptions comprennent généralement au moins des indications ou repères des heures, sous forme d'une graduation, d'index, de chiffres, etc. et la marque du fabricant. D'autres inscriptions peuvent être prévues, telles que des indications des minutes, des secondes, de la date, de la réserve de marche, etc. Toutes ces inscriptions prennent bien entendu de la place sur le cadran et il n'est pas toujours facile de les disposer de façon suffisamment lisible compte tenu de la surface disponible.A watch dial has a number of inscriptions. These inscriptions generally include at least indications or markers of the hours, in the form of a graduation, indexes, figures, etc. and the manufacturer's mark. Other inscriptions may be provided, such as minutes, seconds, date, power reserve, etc. All these inscriptions take place of course on the dial and it is not always easy to arrange them sufficiently readable given the available surface.

La présente invention vise à proposer un cadran qui puisse comporter une quantité accrue d'inscriptions et qui puisse comporter notamment des inscriptions supplémentaires liées à la sécurité, ayant une résolution très élevée, et/ou produisant un effet esthétique.The present invention aims to provide a dial which may include an increased amount of inscriptions and which may include including additional inscriptions related to security, having a very high resolution, and / or producing an aesthetic effect.

A cette fin, il est prévu un cadran pour pièce d'horlogerie, caractérisé en ce qu'il comprend des première et deuxième couches transparentes faites en des matériaux différents et des inscriptions prévues sur au moins une surface de chacune de ces couches.To this end, there is provided a dial for a timepiece, characterized in that it comprises first and second transparent layers made of different materials and inscriptions provided on at least one surface of each of these layers.

Par la superposition de couches transparentes portant chacune des inscriptions, il est possible d'augmenter de manière significative la quantité d'inscriptions présentées. La distinction entre les inscriptions de la première couche et celles de la deuxième couche s'opère par l'effet de profondeur et de relief créé par la superposition des couches.By the superposition of transparent layers each bearing inscriptions, it is possible to significantly increase the amount of inscriptions presented. The distinction between the inscriptions of the first layer and those of the second layer is effected by the effect of depth and relief created by the superposition of the layers.

Le fait que les première et deuxième couches soient réalisées dans des matériaux différents permet l'utilisation de techniques d'inscription différentes pour ces deux couches, adaptées aux matériaux respectifs, pour favoriser la distinction, la lisibilité et la précision des inscriptions.The fact that the first and second layers are made of different materials allows the use of different inscription techniques for these two layers, adapted to the respective materials, to promote the distinction, readability and accuracy of the inscriptions.

De préférence, des inscriptions sont prévues sur les deux surfaces d'au moins une des couches.Preferably, inscriptions are provided on both surfaces of at least one of the layers.

Typiquement, les inscriptions de l'une au moins des couches, de préférence de chacune des couches, comprennent des indications permettant la lecture d'une information en coopération avec au moins un organe indicateur mobile de la pièce d'horlogerie. Ces indications sont par exemple des chiffres, des index ou des graduations. Lorsque les deux couches comportent de telles indications, ces dernières peuvent être proches les unes des autres en vue de dessus, voire chevauchantes, car elles sont séparées en hauteur, ce qui les rend distinguables notamment lorsqu'elles sont vues de biais.Typically, the inscriptions of at least one of the layers, preferably each of the layers, comprise indications permitting the reading of information in cooperation with at least one mobile indicator member of the timepiece. These indications are for example numbers, indexes or graduations. When the two layers include such indications, they can be close to each other in top view, or overlapping, because they are separated in height, which makes them distinguishable especially when viewed from an angle.

Les inscriptions de l'une au moins des couches peuvent comprendre des informations de sécurité, sous la forme par exemple d'au moins un micro-texte et/ou d'au moins un dessin. Ces informations peuvent être visibles ou invisibles. Par « invisible » on entend que ces informations ne peuvent être vues dans des conditions d'éclairage normales mais deviennent visibles dans des conditions spécifiques, par exemple lorsqu'elles sont éclairées par de la lumière ultra-violette.The inscriptions of at least one of the layers may comprise security information, in the form of, for example, at least one micro-text and / or at least one drawing. This information may be visible or invisible. By "invisible" it is meant that this information can not be seen under normal lighting conditions but becomes visible under specific conditions, for example when illuminated by ultraviolet light.

Le cadran peut comprendre au moins une zone transparente pour rendre visible une partie au moins d'un mécanisme, tel que le mouvement, de la pièce d'horlogerie. Des effets optiques particuliers peuvent être produits, dans un but esthétique, en jouant sur la manière avec laquelle la lumière transmise à travers le cadran interagit avec des pièces décorées du mécanisme.The dial may comprise at least one transparent zone to make visible at least a part of a mechanism, such as the movement, of the timepiece. Particular optical effects can be produced, for aesthetic purposes, by varying the way in which the light transmitted through the dial interacts with decorated parts of the mechanism.

Dans un mode de réalisation particulier, l'une des première et deuxième couches est en un matériau plus rigide que celui de l'autre couche. Les inscriptions prévues sur la couche en un matériau plus rigide peuvent comprendre des inscriptions formées par dépôt métallique et/ou par gravure. Les inscriptions prévues sur l'autre couche peuvent comprendre des inscriptions formées par impression, par exemple par la technique de l'offset ou de la taille-douce (intaglio), et donc si souhaité en une résolution plus élevée que celles réalisables avec les procédés d'inscription utilisables sur la couche en un matériau plus rigide. La couche en un matériau plus rigide est par exemple en verre minéral ou en saphir, de préférence en saphir, et l'autre couche en polymère, de préférence en polypropylène.In a particular embodiment, one of the first and second layers is made of a material that is more rigid than that of the other layer. The inscriptions provided on the layer of a more rigid material may comprise inscriptions formed by metal deposition and / or etching. The inscriptions provided on the other layer may comprise inscriptions formed by printing, for example by the technique of offset or intaglio, and therefore if desired in a higher resolution than those achievable with the processes. of inscription usable on the layer in a more rigid material. The layer of a more rigid material is for example mineral glass or sapphire, preferably sapphire, and the other layer of polymer, preferably polypropylene.

Les couches sont typiquement fixées l'une à l'autre au moyen d'une colle transparente.The layers are typically attached to each other by means of a transparent adhesive.

La présente invention propose également une pièce d'horlogerie comprenant une boîte et un cadran tel que défini ci-dessus, le cadran étant entouré et tenu dans la boîte par un joint. Avantageusement, pour assurer une bonne tenue du cadran, le joint est contraint de telle sorte qu'une de ses extrémités soit pliée et rabattue contre le cadran pour serrer le cadran contre une pièce de support de la pièce d'horlogerie.The present invention also proposes a timepiece comprising a box and a dial as defined above, the dial being surrounded and held in the box by a seal. Advantageously, to ensure a good hold of the dial, the seal is constrained so that one of its ends is folded and folded against the dial to tighten the dial against a support part of the timepiece.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe axiale d'un cadran selon l'invention ;
  • la figure 2 est une vue de dessus de la face supérieure d'une couche transparente supérieure du cadran selon l'invention ;
  • la figure 3 est une vue de dessus de la face supérieure d'une couche transparente inférieure du cadran selon l'invention ;
  • la figure 4 est une vue de dessus de la face inférieure de la couche transparente inférieure du cadran selon l'invention ;
  • la figure 5 est une vue de dessus du cadran selon l'invention ;
  • la figure 6 est une vue partielle en coupe axiale d'une pièce d'horlogerie comprenant le cadran selon l'invention ; et
  • la figure 7 est une vue de détail d'une coupe axiale de la pièce d'horlogerie illustrée à la figure 6 prise dans un autre plan que celui de la figure 6.
Other features and advantages of the present invention will appear on reading the following detailed description given with reference to the accompanying drawings in which:
  • the figure 1 is an axial sectional view of a dial according to the invention;
  • the figure 2 is a top view of the upper face of an upper transparent layer of the dial according to the invention;
  • the figure 3 is a top view of the upper face of a lower transparent layer of the dial according to the invention;
  • the figure 4 is a top view of the lower face of the lower transparent layer of the dial according to the invention;
  • the figure 5 is a top view of the dial according to the invention;
  • the figure 6 is a partial view in axial section of a timepiece comprising the dial according to the invention; and
  • the figure 7 is a detail view of an axial section of the timepiece illustrated in FIG. figure 6 taken in another plane than that of the figure 6 .

En référence à la figure 1, un cadran 1 pour pièce d'horlogerie selon un mode de réalisation particulier de l'invention est formé de deux couches 2, 3 assemblées l'une à l'autre. La première couche 2, ou couche supérieure, est destinée à être située du côté des aiguilles indicatrices de la pièce d'horlogerie. Elle comprend une face supérieure 4 et une face inférieure 5. La deuxième couche 3, ou couche inférieure, est destinée à être située du côté du mouvement de la pièce d'horlogerie. Elle comprend une face supérieure 6 et une face inférieure 7.With reference to the figure 1 , a dial 1 for a timepiece according to a particular embodiment of the invention is formed of two layers 2, 3 assembled to each other. The first layer 2, or upper layer, is intended to be located on the side of the indicator needles of the timepiece. It comprises an upper face 4 and a lower face 5. The second layer 3, or lower layer, is intended to be located on the movement side of the timepiece. It comprises an upper face 6 and a lower face 7.

Les couches 2, 3 sont réalisées dans des matériaux respectifs différents mais tous deux transparents. Par le terme « transparent » on entend un matériau qui laisse passer la lumière visible, au moins partiellement (de préférence à un niveau d'au moins 50%). Ainsi, le mouvement de la pièce d'horlogerie, ou une partie de celui-ci, peut être rendu visible à travers le cadran 1. La première couche 2 est faite dans un matériau rigide. C'est cette couche 2 qui confère la rigidité et la solidité au cadran 1. La deuxième couche 3 est, elle, faite dans un matériau souple. De préférence, les couches 2, 3 sont assemblées par l'intermédiaire d'une couche de colle transparente (non visible sur les dessins), située entre la face inférieure 5 de la première couche 2 et la face supérieure 6 de la deuxième couche 3.The layers 2, 3 are made of different respective materials but both transparent. By the term "transparent" is meant a material which allows the visible light to pass at least partially (preferably at a level of at least 50%). Thus, the movement of the timepiece, or part of it, can be made visible through the dial 1. The first layer 2 is made of a rigid material. It is this layer 2 which gives rigidity and strength to the dial 1. The second layer 3 is made of a flexible material. Preferably, the layers 2, 3 are assembled by means of a transparent adhesive layer (not visible in the drawings), located between the lower face 5 of the first layer 2 and the upper face 6 of the second layer 3 .

Chacune des couches 2, 3 porte des inscriptions sur au moins une de ses faces 4, 5, respectivement 6, 7. Les inscriptions sur la première couche 2, en matériau rigide, sont typiquement réalisées par dépôt métallique, par exemple par croissance galvanique, ou par gravure, par exemple par gravure laser. Les inscriptions sur la deuxième couche 3, en matériau souple, sont elles typiquement réalisées par impression, par exemple par la technique de l'offset ou celle de la taille-douce (intaglio).Each of the layers 2, 3 bears inscriptions on at least one of its faces 4, 5, respectively 6, 7. The inscriptions on the first layer 2, made of rigid material, are typically made by metal deposition, for example by galvanic growth, or by etching, for example by laser etching. The inscriptions on the second layer 3, of flexible material, they are typically made by printing, for example by the technique of offset or intaglio (intaglio).

Dans un mode de réalisation avantageux de l'invention, la première couche 2 est en verre minéral ou en saphir, de préférence en saphir en raison de la bonne résistance mécanique et de l'inrayabilité de ce matériau, et la deuxième couche 3 est en polymère, de préférence en polypropylène, de préférence encore en polypropylène bi-orienté (BOPP). Le verre minéral, et plus encore le saphir, se prêtent bien aux techniques de dépôt métallique et de gravure. Les polymères, en particulier le polypropylène, se prêtent bien aux techniques d'impression. Les polymères sont en effet généralement suffisamment souples pour passer dans les machines d'imprimerie rotatives et ont généralement une bonne adhérence pour la fixation de l'encre. Des techniques d'impression très précises, utilisées actuellement dans la fabrication des billets de banque et documents sécurisés, peuvent être employées pour inscrire des informations, notamment des informations de sécurité, sur la couche de polymère 3. Pour améliorer encore la fixation de l'encre, l'une au moins des deux faces 6, 7 de la couche de polymère 3, destinée à être imprimée, peut être recouverte d'un enduit. Les polymères transparents étant généralement moins transparents que le verre minéral ou le saphir, la couche en polymère 3 est de préférence moins épaisse que la couche en verre minéral ou saphir 2, comme représenté. Selon un exemple de réalisation, la première couche 2 a une épaisseur de 0,5 mm et la deuxième couche 3 a une épaisseur de 0,1 mm. Conférer à la couche 3 une faible épaisseur augmente en outre sa souplesse et facilite donc l'impression des surfaces 6, 7. Un exemple de film polymère convenant particulièrement pour former la couche 3 est le film Rayoart™ CGS commercialisé par la société Innovia Films.In an advantageous embodiment of the invention, the first layer 2 is made of mineral glass or sapphire, preferably sapphire because of the good mechanical strength and the scratch resistance of this material, and the second layer 3 is in polymer, preferably polypropylene, more preferably bi-oriented polypropylene (BOPP). The mineral glass, and even more the sapphire, lend themselves to metal deposition and etching techniques. Polymers, in particular polypropylene, are well suited to printing techniques. The polymers are indeed generally sufficiently flexible to pass through rotary printing machines and generally have good adhesion for fixing the ink. Highly accurate printing techniques, currently used in the manufacture of bank notes and secure documents, can be used to record information, including security information, on the polymer layer 3. To further improve the fixation of the ink, at least one of the two faces 6, 7 of the polymer layer 3, intended to be printed, may be coated with a coating. Since transparent polymers are generally less transparent than mineral glass or sapphire, the polymer layer 3 is preferably less thick than the mineral or sapphire glass layer 2, as shown. According to an exemplary embodiment, the first layer 2 has a thickness of 0.5 mm and the second layer 3 has a thickness of 0.1 mm. Conferring layer 3 a small thickness further increases its flexibility and thus facilitates the printing of surfaces 6, 7. An example of a polymer film particularly suitable for forming layer 3 is Rayoart ™ CGS film marketed by the company Innovia Films.

Les inscriptions portées par les couches 2, 3 peuvent comporter notamment :

  • des indications telles que graduations, index, chiffres, lettres permettant à l'utilisateur de la pièce d'horlogerie de lire des grandeurs de mesure du temps (heure, minute, seconde, quantième, jour de la semaine, etc.) ou d'autres grandeurs (réserve de marche, etc.) à l'aide d'organes indicateurs tels que des aiguilles 1 a tournant au-dessus du cadran (cf. figure 6) ;
  • des informations relatives à la marque sous laquelle la pièce d'horlogerie est vendue, aux caractéristiques ou à la qualité de fabrication de la pièce d'horlogerie, au pays dans lequel la pièce d'horlogerie a été fabriquée, etc. ;
  • des informations de sécurité tels que des micro-textes (textes lisibles uniquement à la loupe), des dessins, des hologrammes, etc. permettant l'authentification de la pièce d'horlogerie ;
  • des décorations telles que des dessins ou des images, colorés ou non.
The inscriptions carried by the layers 2, 3 can comprise in particular:
  • indications such as graduations, indexes, numbers, letters allowing the user of the timepiece to read quantities of time (hour, minute, second, date, day of the week, etc.) or of other quantities (power reserve, etc.) using indicating devices such as hands 1 to turn above the dial (cf. figure 6 );
  • information relating to the mark under which the timepiece is sold, the characteristics or the quality of the manufacture of the timepiece, the country in which the timepiece was manufactured, etc. ;
  • security information such as micro-texts (read-only texts), drawings, holograms, etc. enabling the authentication of the timepiece;
  • decorations such as drawings or images, colored or not.

Un exemple de réalisation est illustré aux figures 2 à 5. Dans cet exemple, la première couche 2, réalisée en saphir, porte des inscriptions uniquement sur sa face supérieure 4. La deuxième couche 3, réalisée en polypropylène bi-orienté, porte des inscriptions sur ses faces supérieure 6 et inférieure 7. Les inscriptions de la deuxième couche 3 sont constituées uniquement d'encre d'impression. La face supérieure 6 de cette couche 3 est donc lisse, comme la face inférieure 5 de la première couche 2, ce qui facilite le collage des faces 5, 6 l'une contre l'autre.An exemplary embodiment is illustrated in Figures 2 to 5 . In this example, the first layer 2, made of sapphire, bears inscriptions only on its upper face 4. The second layer 3, made of bi-oriented polypropylene, has inscriptions on its upper 6 and lower 7 faces. the second layer 3 consist solely of printing ink. The upper face 6 of this layer 3 is smooth, as the lower face 5 of the first layer 2, which facilitates the bonding of the faces 5, 6 against each other.

En référence à la figure 2, la face supérieure 4 de la première couche 2 porte, dans l'exemple représenté, des inscriptions formées par gravure laser, telles que des chiffres 8 des heures, des indications 9, 10 des quantièmes et des jours de la semaine, et des indications 11 relatives à la marque du fabricant. Les creux formés dans le saphir par la gravure sont de préférence remplis d'encre, par exemple au moyen d'une seringue, pour rendre bien visible les indications 8 à 11, puis la surface 4 est polie. D'autres inscriptions, telles que des indications 12, sont par exemple gravées mais non remplies d'encre. D'autres inscriptions, telles que des micro-textes 13 et un dessin 14, sont elles réalisées par dépôt métallique, par exemple par croissance galvanique, avec plus ou moins de relief.With reference to the figure 2 , the upper face 4 of the first layer 2 carries, in the example shown, inscriptions formed by laser engraving, such as numbers 8 hours, indications 9, 10 dates and days of the week, and indications 11 relating to the manufacturer's mark. The depressions formed in the sapphire by the etching are preferably filled with ink, for example by means of a syringe, to make visible the indications 8 to 11, then the surface 4 is polished. Other inscriptions, such as indications 12, are for example engraved but not filled with ink. Other inscriptions, such as micro-texts 13 and a drawing 14, are made by metal deposition, for example by galvanic growth, with more or less relief.

Comme on peut le voir à la figure 3, la face supérieure 6 de la deuxième couche 3 porte, dans l'exemple représenté, un décor 15, formé ici de traits radiaux, une graduation 16 destinée à permettre la lecture d'une information, ici la réserve de marche, en coopération avec une aiguille indicatrice mobile au-dessus du cadran 1, et un dessin ou figure géométrique, tel qu'un point ou disque 17, formé par de l'encre invisible, c'est-à-dire typiquement de l'encre qui est visible uniquement sous ultra-violets. Le dessin 17 peut être placé sur la surface 6 à la même position que le dessin 14 sur la surface 4 et les dessins 14, 17 peuvent avoir la même dimension. Les inscriptions 15, 16, 17 sont réalisées par exemple par une technique d'impression du type offset ou taille-douce, de préférence taille-douce.As can be seen at figure 3 the upper face 6 of the second layer 3 carries, in the example shown, a decoration 15, here formed by radial lines, a scale 16 intended to allow reading of information, here the power reserve, in cooperation with a movable indicator needle above the dial 1, and a geometrical figure or figure, such as a dot or disc 17, formed by invisible ink, that is to say typically ink which is visible only under ultraviolet. The drawing 17 may be placed on the surface 6 in the same position as the drawing 14 on the surface 4 and the drawings 14, 17 may have the same dimension. The inscriptions 15, 16, 17 are made for example by a printing technique of the offset or intaglio type, preferably intaglio.

En référence à la figure 4, la face inférieure 7 de la deuxième couche 3 porte, dans l'exemple représenté, un décor comprenant une trame de croix 18 et plusieurs groupes de cercles concentriques 19. Un disque 20 sans inscriptions est ménagé pour rendre visible une partie déterminée du mouvement. Le décor 18, 19 est réalisé par exemple par offset ou taille-douce, de préférence taille-douce. La figure 5 montre le cadran 1 en vue de dessus formé des deux couches 2, 3 avec les inscriptions illustrées aux figures 2 à 4.With reference to the figure 4 , the lower face 7 of the second layer 3 carries, in the example shown, a decor comprising a cross frame 18 and several groups of concentric circles 19. A disc 20 without inscriptions is arranged to make visible a specific part of the movement. The decoration 18, 19 is made for example by offset or intaglio, preferably intaglio. The figure 5 shows the dial 1 in plan view formed of the two layers 2, 3 with the inscriptions illustrated in FIGS. Figures 2 to 4 .

Les micro-textes 13 et les décors 15, 18, 19, par leur précision et leur finesse, constituent des informations de sécurité permettant d'authentifier la pièce d'horlogerie. Le dessin en encre invisible 17 constitue aussi une telle information de sécurité. Grâce aux différentes surfaces 4, 6, 7 qui portent des inscriptions, et qui sont séparées uniquement par de la matière transparente, le cadran 1 peut comporter un grand nombre d'inscriptions, la distinction entre les inscriptions de différentes surfaces se faisant par l'effet de profondeur et par les effets visuels différents produits par les différentes techniques d'inscription employées pour les couches 2 et 3.The micro-texts 13 and the decorations 15, 18, 19, by their precision and fineness, constitute security information for authenticating the timepiece. Invisible ink design 17 also constitutes such security information. Thanks to the different surfaces 4, 6, 7 which bear inscriptions, and which are separated only by transparent material, the dial 1 can comprise a large number of inscriptions, the distinction between the inscriptions of different surfaces being made by the effect of depth and by the different visual effects produced by the different registration techniques employed for layers 2 and 3.

Dans des variantes de réalisation, la couche en verre minéral ou saphir 2 et la couche en polymère 3 pourraient être inversées. Une ou plusieurs autres couches transparentes pourraient être ajoutées. Par exemple, le cadran 1 pourrait être formé de deux couches de verre minéral ou saphir prenant en sandwich une couche de polymère.In alternative embodiments, the mineral glass or sapphire layer 2 and the polymer layer 3 could be reversed. One or more other transparent layers could be added. For example, the dial 1 could be formed of two layers of mineral or sapphire glass sandwiching a polymer layer.

La figure 6 montre comment le cadran 1 selon l'invention peut être monté dans la boîte de la pièce d'horlogerie. Dans l'exemple représenté, la boîte de la pièce d'horlogerie comprend une lunette 21 dans laquelle est fixée une glace 22, un cercle 23 recevant le mouvement, désigné par 24, un fond 25 muni d'une glace 26 et une carrure 27 entourant le cercle 23 et fixée entre la lunette 21 et le fond 25. Le cercle 23 comporte un filetage supérieur 28 et un filetage inférieur 29 coopérant avec des filetages respectifs de la lunette 21 et du fond 25 pour fixer le cercle 23 à la lunette 21 et au fond 25.The figure 6 shows how the dial 1 according to the invention can be mounted in the box of the timepiece. In the example shown, the box of the timepiece comprises a telescope 21 in which is fixed a mirror 22, a circle 23 receiving the movement, designated 24, a bottom 25 provided with an ice 26 and a middle part 27 surrounding the circle 23 and fixed between the bezel 21 and the bottom 25. The circle 23 has an upper thread 28 and a thread lower 29 cooperating with respective threads of the telescope 21 and the bottom 25 to fix the circle 23 to the telescope 21 and the bottom 25.

Le cercle 23 comporte une face supérieure annulaire 30 et un rebord annulaire 31 faisant saillie à la périphérie de la face 30 et dont la face extérieure définit le filetage 28. La face 30 et le rebord 31 définissent un logement annulaire entourant la partie supérieure du mouvement 24 et dans lequel est placée une bague de support 32. Sur cette bague de support 32, et au-dessus du mouvement 24, est placé le cadran 1 selon l'invention. L'ensemble cadran 1 et bague de support 32 est maintenu axialement (verticalement) et latéralement par un joint annulaire 33 à section en forme de L disposé et comprimé axialement entre la face supérieure 30 du cercle 23 et une face inférieure 34 d'une saillie intérieure de la lunette 21 et latéralement entre la périphérie de l'ensemble cadran 1 et bague de support 32 et le rebord 33. La partie annulaire horizontale 35 du joint 33, définissant la branche horizontale de la section en L, est reçue dans un dégagement annulaire périphérique 36 pratiqué dans la face inférieure de la bague 32 et est ainsi maintenue entre la bague 32 et le cercle 23, pour positionner axialement le joint 33.The circle 23 has an annular upper face 30 and an annular flange 31 projecting from the periphery of the face 30 and whose outer face defines the thread 28. The face 30 and the flange 31 define an annular housing surrounding the upper part of the movement 24 and in which is placed a support ring 32. On this support ring 32, and above the movement 24, is placed the dial 1 according to the invention. The dial assembly 1 and support ring 32 is held axially (vertically) and laterally by an annular seal 33 with an L-shaped cross-section axially compressed between the upper face 30 of the circle 23 and a lower face 34 of a projection. inside the bezel 21 and laterally between the periphery of the dial assembly 1 and the support ring 32 and the flange 33. The horizontal annular portion 35 of the gasket 33, defining the horizontal leg of the L-shaped section, is received in a clearance peripheral ring 36 formed in the lower face of the ring 32 and is thus held between the ring 32 and the circle 23, to position the gasket 33 axially.

La face 34 de la lunette 21 comporte une entaille annulaire 37 qui reçoit l'extrémité annulaire supérieure 38 du joint 33, c'est-à-dire l'extrémité de la branche verticale de la section en L. L'entaille 37 est définie par deux surfaces planes 39, 40 faisant un angle entre elles (cf. figure 7). La surface 39 exerce une pression sur l'extrémité 38 du joint 33 pendant et après le montage de la lunette 21 sur le cercle 23 pour plier cette extrémité 38 vers l'intérieur de la boîte et ainsi la rabattre contre la face supérieure du cadran 1. Cet état contraint du joint 33 est représenté à la figure 7. A la figure 6, en revanche, le joint 33 est représenté non pas dans son état réel, contraint, mais dans son état de repos où l'extrémité 38 est droite. La surface 40 de l'entaille 37 constitue une butée qui maintient l'extrémité 38 du joint 33 pliée. L'ensemble cadran 1 et bague de support 32 est ainsi serré axialement contre la face supérieure 30 du cercle 23 par le joint 33 lui même comprimé entre le cadran 1 et la lunette 21. L'ensemble cadran 1 et bague de support 32 est également serré latéralement contre la face intérieure du rebord 31 par l'intermédiaire du joint 33, comprimé entre l'ensemble 1, 32 et le rebord 31. De la sorte, une bonne tenue du cadran 1 est assurée, sans soudage ni vissage de celui-ci. Le joint 33 joue en outre le rôle d'absorbeur de chocs, notamment latéraux, pour protéger le cadran 1. Le joint 33 est réalisé dans une matière élastique telle que le caoutchouc naturel ou synthétique. Pour positionner angulairement le cadran 1, une goupille 41 chassée dans le cercle 23 traverse la bague de support 32 et coopère avec un alésage correspondant 42 du cadran 1, comme représenté à la figure 7.The face 34 of the telescope 21 has an annular notch 37 which receives the upper annular end 38 of the seal 33, that is to say the end of the vertical branch of the L-shaped section. The notch 37 is defined by two flat surfaces 39, 40 forming an angle between them (cf. figure 7 ). The surface 39 exerts a pressure on the end 38 of the seal 33 during and after the mounting of the telescope 21 on the circle 23 to fold this end 38 towards the inside of the box and thus fold it against the upper face of the dial 1 This constrained state of the seal 33 is shown in FIG. figure 7 . To the figure 6 on the other hand, the seal 33 is represented not in its actual state, constrained, but in its rest state where the end 38 is right. The surface 40 of the notch 37 constitutes a stop which holds the end 38 of the joint 33 folded. The dial assembly 1 and support ring 32 is thus clamped axially against the upper face 30 of the circle 23 by the gasket 33 itself compressed between the dial 1 and the telescope 21. The dial assembly 1 and the support ring 32 is also clamped laterally against the inner face of the flange 31 via the seal 33, compressed between the assembly 1, 32 and the flange 31. In this way, a good hold of the dial 1 is ensured, without welding or screwing of it- this. The seal 33 also plays the role of shock absorber, particularly lateral, to protect the dial 1. The seal 33 is made of an elastic material such as natural or synthetic rubber. To angularly position the dial 1, a pin 41 driven into the circle 23 passes through the support ring 32 and cooperates with a corresponding bore 42 of the dial 1, as shown in FIG. figure 7 .

Claims (16)

Cadran pour pièce d'horlogerie, caractérisé en ce qu'il comprend des première et deuxième couches transparentes (2, 3) faites en des matériaux différents et des inscriptions prévues sur au moins une surface (4, 6, 7) de chacune de ces couches.Dial for a timepiece, characterized in that it comprises first and second transparent layers (2, 3) made of different materials and inscriptions provided on at least one surface (4, 6, 7) of each of these layers. Cadran selon la revendication 1, caractérisé en ce que des inscriptions sont prévues sur les deux surfaces (6, 7) d'au moins une (3) des couches (2, 3).Dial according to claim 1, characterized in that inscriptions are provided on the two surfaces (6, 7) of at least one (3) of the layers (2, 3). Cadran selon la revendication 1 ou 2, caractérisé en ce que les inscriptions de l'une au moins des couches (2, 3) comprennent des indications (8, 9, 10, 16) permettant la lecture d'une information en coopération avec au moins un organe indicateur mobile (1a) de la pièce d'horlogerie.Dial according to claim 1 or 2, characterized in that the inscriptions of at least one of the layers (2, 3) comprise indications (8, 9, 10, 16) for reading information in cooperation with minus one movable indicator member (1a) of the timepiece. Cadran selon la revendication 1 ou 2, caractérisé en ce que les inscriptions de chacune des couches (2, 3) comprennent des indications (8, 9, 10, 16) permettant la lecture d'une information en coopération avec au moins un organe indicateur mobile (1a) de la pièce d'horlogerie.Dial according to claim 1 or 2, characterized in that the inscriptions of each of the layers (2, 3) comprise indications (8, 9, 10, 16) enabling the reading of an information in cooperation with at least one indicator organ. mobile (1a) of the timepiece. Cadran selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les inscriptions de l'une au moins des couches (2, 3) comprennent des informations de sécurité (13, 15, 17, 18, 19).Dial according to any one of claims 1 to 4, characterized in that the inscriptions of at least one of the layers (2, 3) comprise security information (13, 15, 17, 18, 19). Cadran selon la revendication 5, caractérisé en ce que les informations de sécurité comprennent au moins un micro-texte (13) et/ou au moins un dessin (15, 17, 18, 19).Dial according to claim 5, characterized in that the security information comprises at least one micro-text (13) and / or at least one drawing (15, 17, 18, 19). Cadran selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend au moins une zone transparente (20) pour rendre visible une partie au moins d'un mécanisme (24) de la pièce d'horlogerie.Dial according to any one of claims 1 to 6, characterized in that it comprises at least one transparent zone (20) to make visible at least part of a mechanism (24) of the timepiece. Cadran selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'une (2) des couches (2, 3) est faite en un matériau plus rigide que celui de l'autre couche (3).Dial according to any one of claims 1 to 7, characterized in that one (2) of the layers (2, 3) is made of a more rigid material than that of the other layer (3). Cadran selon la revendication 8, caractérisé en ce que les inscriptions prévues sur la couche (2) en un matériau plus rigide comprennent des inscriptions formées par dépôt métallique et/ou par gravure.Dial according to claim 8, characterized in that the inscriptions provided on the layer (2) of a more rigid material comprise inscriptions formed by metal deposition and / or etching. Cadran selon la revendication 8 ou 9, caractérisé en ce que les inscriptions prévues sur l'autre couche (3) comprennent des inscriptions formées par impression.Dial according to claim 8 or 9, characterized in that the inscriptions provided on the other layer (3) comprise inscriptions formed by printing. Cadran selon l'une quelconque des revendications 8 à 10, caractérisé en ce que la couche (2) en un matériau plus rigide est en verre minéral ou en saphir et l'autre couche (3) est en polymère.Dial according to any one of claims 8 to 10, characterized in that the layer (2) made of a more rigid material is made of mineral glass or sapphire and the other layer (3) is made of polymer. Cadran selon la revendication 11, caractérisé en ce que la couche (2) en un matériau plus rigide est en saphir.Dial according to claim 11, characterized in that the layer (2) of a more rigid material is sapphire. Cadran selon la revendication 11 ou 12, caractérisé en ce que le polymère est du polypropylène.Dial according to claim 11 or 12, characterized in that the polymer is polypropylene. Cadran selon l'une quelconque des revendications 1 à 13, caractérisé en ce que les couches (2, 3) sont fixées l'une à l'autre au moyen d'une colle transparente.Dial according to any one of claims 1 to 13, characterized in that the layers (2, 3) are fixed to each other by means of a transparent adhesive. Pièce d'horlogerie comprenant une boîte et un cadran selon l'une quelconque des revendications 1 à 14, le cadran (1) étant entouré et tenu dans la boîte (21-23, 25-27) par un joint (33).Timepiece comprising a box and a dial according to any one of claims 1 to 14, the dial (1) being surrounded and held in the box (21-23, 25-27) by a seal (33). Pièce d'horlogerie selon la revendication 15, caractérisée en ce que le joint (33) est contraint de telle sorte qu'une de ses extrémités (38) soit pliée et rabattue contre le cadran (1) pour serrer le cadran (1) contre une pièce de support (32, 23) de la pièce d'horlogerie.Timepiece according to claim 15, characterized in that the seal (33) is constrained so that one of its ends (38) is folded and folded against the dial (1) to tighten the dial (1) against a support piece (32, 23) of the timepiece.
EP20080005729 2008-03-27 2008-03-27 Dial for a timepiece Active EP2105808B1 (en)

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CH713871A1 (en) * 2017-07-27 2019-01-31 Richemont Int Sa Clock component comprising graphic elements of various aspects and method of manufacturing such a component.
US20210222297A1 (en) * 2017-09-13 2021-07-22 Rolex Sa Protective Coating For A Complex Watch Component
CN114237004A (en) * 2021-12-22 2022-03-25 深圳市新隆达表业有限公司 Dial plate show form transform structure and have wrist-watch of this structure

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