EP3521945B1 - Dial for timepiece and method for manufacturing same - Google Patents

Dial for timepiece and method for manufacturing same Download PDF

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Publication number
EP3521945B1
EP3521945B1 EP18155191.2A EP18155191A EP3521945B1 EP 3521945 B1 EP3521945 B1 EP 3521945B1 EP 18155191 A EP18155191 A EP 18155191A EP 3521945 B1 EP3521945 B1 EP 3521945B1
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EP
European Patent Office
Prior art keywords
mother
pearl
dial
pattern
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18155191.2A
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German (de)
French (fr)
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EP3521945A1 (en
Inventor
Hakim El Kadiri
Thomas Froelicher
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.)
Rado Watch Co Ltd
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Rado Watch Co Ltd
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
Priority to EP18155191.2A priority Critical patent/EP3521945B1/en
Application filed by Rado Watch Co Ltd filed Critical Rado Watch Co Ltd
Priority to PCT/EP2018/055510 priority patent/WO2019149384A1/en
Priority to KR1020207021963A priority patent/KR20200104386A/en
Priority to US16/963,055 priority patent/US20200348625A1/en
Priority to CN201880086852.3A priority patent/CN111615671A/en
Priority to JP2020539720A priority patent/JP6997328B2/en
Priority to KR1020217004321A priority patent/KR20210020169A/en
Publication of EP3521945A1 publication Critical patent/EP3521945A1/en
Application granted granted Critical
Publication of EP3521945B1 publication Critical patent/EP3521945B1/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
    • G04B19/12—Selection of materials for dials or graduations markings
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for dials

Definitions

  • the invention relates to a dial for a timepiece comprising a support and a mother-of-pearl sheet, the mother-of-pearl sheet having a front face and a rear face facing said support and on which a pattern has been printed.
  • the invention also relates to a method of manufacturing such a dial, as well as to a timepiece comprising such a dial.
  • the pattern is formed by phosphorescent, fluorescent or luminescent light elements in order to form an image visible in the dark but invisible under normal illumination conditions.
  • the light elements can be applied to the rear face of the mother-of-pearl or to the substrate or be deposited in blind cavities hollowed out in the mother-of-pearl or in the substrate.
  • the recommended thickness for the mother-of-pearl sheet is 0.4 mm. This thickness is necessary to make it possible to dig the blind cavities.
  • the mother-of-pearl sheet must be of sufficient thickness so that the layer of phosphorescent pigments does not appear by transparency through the mother-of-pearl in daylight, under normal illumination condition. This thickness of mother-of-pearl gives the dial a significant thickness so that it is not possible to produce ultra-thin dials for the manufacture of ultra-thin watches.
  • the aim of the present invention is to overcome the drawbacks mentioned above by providing a mother-of-pearl dial and its manufacturing process making it possible to produce an ultra-thin dial and a timepiece, in particular an ultra-thin watch, comprising such a dial, without harming the characteristic appearance of mother-of-pearl.
  • the invention relates to a dial for a timepiece comprising a support and a mother-of-pearl sheet, the mother-of-pearl sheet having a front face and a rear face facing said support and on which a pattern has been printed. .
  • the mother-of-pearl sheet has a thickness of between 50 ⁇ m and 300 ⁇ m so that the pattern printed on the rear face of the mother-of-pearl sheet appears by transparency through the mother-of-pearl under normal illumination conditions.
  • a mother-of-pearl dial decorated with an ultra-thin pattern is obtained while preserving the iridescent character of the mother-of-pearl and the smooth appearance of the mother-of-pearl on the front face, visible to a user.
  • the dial 1 for a timepiece comprises a support 2 and a mother-of-pearl sheet 3.
  • the support 2 is metallic. It is for example made in a sheet of brass.
  • the mother-of-pearl sheet has a front face 3a, corresponding to the side visible to the user, and a rear face 3b, positioned facing the support 2 and on which a pattern 4 has been printed.
  • This metal ring 6 may for example have a thickness of the order of 700 ⁇ m to 900 ⁇ m. , for example 800 ⁇ m.
  • the mother-of-pearl sheet has a thickness of between 50 ⁇ m and 300 ⁇ m so that the pattern printed on the rear face of the mother-of-pearl appears by transparency through the mother-of-pearl under normal illumination conditions, in particular in grazing light.
  • the mother-of-pearl sheet has a thickness of between 50 ⁇ m and 250 ⁇ m, preferably between 100 ⁇ m and 200 ⁇ m, preferably between 120 ⁇ m and 180 ⁇ m, more preferably between 130 ⁇ m and 170 ⁇ m, and even more preferably between 140 ⁇ m and 160 ⁇ m.
  • the thickness of the mother-of-pearl sheet is approximately 150 ⁇ m.
  • Such a thickness of the mother-of-pearl sheet is a compromise found by the applicant making it possible, on the one hand, to maintain the transparency necessary for the pattern printed on the rear face of the mother-of-pearl to appear by transparency through the mother-of-pearl under normal conditions of use. illumination, and on the other hand to avoid breaking the mother-of-pearl sheet, in particular when printing the pattern, due to too great a fragility.
  • the metal support 2 may for example have a thickness of the order of 200 ⁇ m to 250 ⁇ m, so that the dial has for example an ultra-thin total thickness of 350 ⁇ m to 400 ⁇ m.
  • the printed pattern 4 can be any type of pattern.
  • the printed pattern consists of a set of lines of different widths, making it possible to create the appearance of a structure.
  • the pattern can represent the veins and structure of a leaf.
  • the mother-of-pearl used is natural mother-of-pearl.
  • the mother-of-pearl can be colored.
  • the method also comprises a step for assembling the metal ring 6 on the peripheral edge of the mother-of-pearl sheet 3.
  • steps a) and b) the support 2, the mother-of-pearl sheet 3 and the ring 6 are cut and prepared to present the desired shape and dimensions of the dial, as well as the thicknesses in accordance with the invention.
  • the orifices 8 for the passage of the axis of the switch are also made in the support 2 and the mother-of-pearl sheet 3.
  • a pattern 4 is printed on the rear face 3b of the mother-of-pearl sheet by means of an ink deposited according to a method chosen from the group comprising screen printing, photolithography, and jet printing. 'ink. Screen printing is particularly preferred.
  • the thickness of the deposited ink layer is between 10 ⁇ m and 40 ⁇ m, preferably between 20 ⁇ m and 30 ⁇ m.
  • the ink used is standard.
  • the printing process is implemented to print a pattern consisting of a set of lines of different widths in order to create the appearance of a structure.
  • the method of the invention can comprise a step e) of tinting the mother-of-pearl before step c) of printing the pattern.
  • the front face 3a of the mother-of-pearl sheet can be polished to obtain a front face. smooth.
  • the mother-of-pearl sheet 3 is then protected by a sapphire crystal (not shown). Indexes or other decorative elements can be placed on the sapphire crystal or on the mother-of-pearl sheet 3.
  • the present invention also relates to a timepiece comprising a dial as described above.
  • the invention makes it possible to obtain an ultra thin frame, made of mother-of-pearl decorated with a pattern, while preserving the iridescent character of the mother-of-pearl and the smooth appearance of the mother-of-pearl on the front face. By transparency through the mother-of-pearl, the pattern appears more discreet, thinner and more elegant.
  • the invention also makes it possible to obtain a timepiece, and in particular a watch, ultra thin, due to the use of an ultra thin dial.

Description

Domaine de l'inventionField of the invention

L'invention se rapporte à un cadran pour pièce d'horlogerie comprenant un support et une feuille de nacre, la feuille de nacre présentant une face avant et une face arrière en regard dudit support et sur laquelle un motif a été imprimé. L'invention se rapporte également à un procédé de fabrication d'un tel cadran, ainsi qu'à une pièce d'horlogerie comprenant un tel cadran.The invention relates to a dial for a timepiece comprising a support and a mother-of-pearl sheet, the mother-of-pearl sheet having a front face and a rear face facing said support and on which a pattern has been printed. The invention also relates to a method of manufacturing such a dial, as well as to a timepiece comprising such a dial.

Arrière-plan de l'inventionBackground of the invention

Un tel cadran est par exemple décrit dans le brevet CH 697 210 . Dans ce document, le motif est formé par des éléments lumineux phosphorescents, fluorescents ou luminescents afin de former une image visible dans l'obscurité mais invisible en condition d'illumination normale. Pour ce faire, les éléments lumineux peuvent être appliqués sur la face arrière de la nacre ou sur le substrat ou être déposés dans des cavités borgnes creusées dans la nacre ou dans le substrat. L'épaisseur recommandée pour la feuille de nacre est de 0.4 mm. Cette épaisseur est nécessaire pour permettre de creuser les cavités borgnes. En outre, la feuille de nacre doit avoir une épaisseur suffisante pour que la couche de pigments phosphorescents n'apparaisse pas par transparence au travers de la nacre à la lumière du jour, en condition d'illumination normale. Cette épaisseur de nacre confère au cadran une épaisseur importante de sorte qu'il n'est pas possible de réaliser des cadrans ultra minces pour la fabrication de montres ultra fines.Such a dial is for example described in the patent CH 697 210 . In this document, the pattern is formed by phosphorescent, fluorescent or luminescent light elements in order to form an image visible in the dark but invisible under normal illumination conditions. To do this, the light elements can be applied to the rear face of the mother-of-pearl or to the substrate or be deposited in blind cavities hollowed out in the mother-of-pearl or in the substrate. The recommended thickness for the mother-of-pearl sheet is 0.4 mm. This thickness is necessary to make it possible to dig the blind cavities. In addition, the mother-of-pearl sheet must be of sufficient thickness so that the layer of phosphorescent pigments does not appear by transparency through the mother-of-pearl in daylight, under normal illumination condition. This thickness of mother-of-pearl gives the dial a significant thickness so that it is not possible to produce ultra-thin dials for the manufacture of ultra-thin watches.

Résumé de l'inventionSummary of the invention

Le but de la présente invention est de pallier les inconvénients cités précédemment en proposant un cadran en nacre et son procédé de fabrication permettant de réaliser un cadran ultra mince et une pièce d'horlogerie, notamment une montre, ultra fine, comprenant un tel cadran, sans nuire à l'aspect caractéristique de la nacre.The aim of the present invention is to overcome the drawbacks mentioned above by providing a mother-of-pearl dial and its manufacturing process making it possible to produce an ultra-thin dial and a timepiece, in particular an ultra-thin watch, comprising such a dial, without harming the characteristic appearance of mother-of-pearl.

A cet effet, l'invention se rapporte à un cadran pour pièce d'horlogerie comprenant un support et une feuille de nacre, la feuille de nacre présentant une face avant et une face arrière en regard dudit support et sur laquelle un motif a été imprimé.To this end, the invention relates to a dial for a timepiece comprising a support and a mother-of-pearl sheet, the mother-of-pearl sheet having a front face and a rear face facing said support and on which a pattern has been printed. .

Selon l'invention, la feuille de nacre présente une épaisseur comprise entre 50 µm et 300 µm pour que le motif imprimé sur la face arrière de la feuille de nacre apparaisse par transparence au travers de la nacre dans des conditions normales d'illumination.According to the invention, the mother-of-pearl sheet has a thickness of between 50 μm and 300 μm so that the pattern printed on the rear face of the mother-of-pearl sheet appears by transparency through the mother-of-pearl under normal illumination conditions.

Ainsi, on obtient un cadran en nacre décorée d'un motif ultra mince tout en préservant le caractère irisé de la nacre et l'aspect lisse de la nacre en face avant, visible par un utilisateur.Thus, a mother-of-pearl dial decorated with an ultra-thin pattern is obtained while preserving the iridescent character of the mother-of-pearl and the smooth appearance of the mother-of-pearl on the front face, visible to a user.

Description sommaire des dessinsBrief description of the drawings

D'autres particularités et avantages ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue de dessus d'un cadran selon l'invention ; et
  • la figure 2 est une vue en coupe selon l'axe AA de la figure 1.
Other features and advantages will emerge clearly from the description which is given below, by way of indication and in no way limiting, with reference to the appended drawings, in which:
  • the figure 1 is a top view of a dial according to the invention; and
  • the figure 2 is a sectional view along the AA axis of the figure 1 .

Description détaillée des modes de réalisation préférésDetailed description of the preferred embodiments

En référence à la figure 1, le cadran 1 pour pièce d'horlogerie comprend un support 2 et une feuille de nacre 3.With reference to the figure 1 , the dial 1 for a timepiece comprises a support 2 and a mother-of-pearl sheet 3.

De préférence, le support 2 est métallique. Il est par exemple réalisé dans une feuille de laiton.Preferably, the support 2 is metallic. It is for example made in a sheet of brass.

La feuille de nacre présente une face avant 3a, correspondant au côté visible par l'utilisateur, et une face arrière 3b, positionnée en regard du support 2 et sur laquelle un motif 4 a été imprimé.The mother-of-pearl sheet has a front face 3a, corresponding to the side visible to the user, and a rear face 3b, positioned facing the support 2 and on which a pattern 4 has been printed.

Une bague métallique 6, de préférence en laiton, est prévue sur le bord périphérique de la feuille de nacre 3 pour définir les contours du cadran 1. Cette bague métallique 6 peut présenter par exemple une épaisseur de l'ordre de 700 µm à 900 µm, par exemple 800 µm.A metal ring 6, preferably made of brass, is provided on the peripheral edge of the mother-of-pearl sheet 3 to define the contours of the dial 1. This metal ring 6 may for example have a thickness of the order of 700 μm to 900 μm. , for example 800 µm.

Conformément à la présente invention, la feuille de nacre présente une épaisseur comprise entre 50 µm et 300 µm pour que le motif imprimé sur la face arrière de la nacre apparaisse par transparence au travers de la nacre dans des conditions normales d'illumination, notamment en lumière rasante. De préférence, la feuille de nacre présente une épaisseur comprise entre 50 µm et 250 µm, de préférence entre 100 µm et 200 µm, de préférence entre 120 µm et 180 µm, plus préférentiellement entre 130 µm et 170 µm, et encore plus préférentiellement entre 140 µm et 160 µm. Par exemple, l'épaisseur de la feuille de nacre est d'environ 150 µm. Une telle épaisseur de la feuille de nacre est un compromis trouvé par la déposante permettant d'une part de conserver la transparence nécessaire pour que le motif imprimé sur la face arrière de la nacre apparaisse par transparence au travers de la nacre dans des conditions normales d'illumination, et d'autre part d'éviter de casser la feuille de nacre, notamment lors de l'impression du motif, en raison d'une trop grande fragilité.In accordance with the present invention, the mother-of-pearl sheet has a thickness of between 50 μm and 300 μm so that the pattern printed on the rear face of the mother-of-pearl appears by transparency through the mother-of-pearl under normal illumination conditions, in particular in grazing light. Preferably, the mother-of-pearl sheet has a thickness of between 50 μm and 250 μm, preferably between 100 μm and 200 μm, preferably between 120 μm and 180 μm, more preferably between 130 μm and 170 μm, and even more preferably between 140 µm and 160 µm. For example, the thickness of the mother-of-pearl sheet is approximately 150 µm. Such a thickness of the mother-of-pearl sheet is a compromise found by the applicant making it possible, on the one hand, to maintain the transparency necessary for the pattern printed on the rear face of the mother-of-pearl to appear by transparency through the mother-of-pearl under normal conditions of use. illumination, and on the other hand to avoid breaking the mother-of-pearl sheet, in particular when printing the pattern, due to too great a fragility.

D'une manière avantageuse, le support métallique 2 peut présenter par exemple une épaisseur de l'ordre de 200 µm à 250 µm, de sorte que le cadran présente par exemple une épaisseur totale ultra mince de 350 µm à 400 µm.Advantageously, the metal support 2 may for example have a thickness of the order of 200 μm to 250 μm, so that the dial has for example an ultra-thin total thickness of 350 μm to 400 μm.

Le motif imprimé 4 peut être tout type de motif. De préférence, le motif imprimé est constitué par un ensemble de traits de différentes largeurs, permettant de créer l'apparence d'une structure. Par exemple, le motif peut représenter les nervures et la structure d'une feuille.The printed pattern 4 can be any type of pattern. Preferably, the printed pattern consists of a set of lines of different widths, making it possible to create the appearance of a structure. For example, the pattern can represent the veins and structure of a leaf.

De préférence, la nacre utilisée est de la nacre naturelle.Preferably, the mother-of-pearl used is natural mother-of-pearl.

D'une manière avantageuse, la nacre peut être colorée.Advantageously, the mother-of-pearl can be colored.

Le procédé de fabrication d'un tel cadran comprend les étapes de :

  1. a) se munir d'un support 2, de préférence métallique, en laiton par exemple
  2. b) se munir d'une feuille de nacre 3 présentant une épaisseur comprise entre 50 µm et 300 µm, de préférence entre 50 µm et 250 µm, de préférence entre 100 µm et 200 µm, de préférence comprise entre 120 µm et 180 µm, plus préférentiellement entre 130 µm et 170 µm, et encore plus préférentiellement entre 140 µm et 160 µm
  3. c) imprimer un motif 4 sur la face arrière 3b de la feuille de nacre
  4. d) assembler la feuille de nacre 3 imprimée obtenue à l'étape c) sur le support 2, et l'épaisseur selon l'étape b) étant choisie pour que le motif puisse apparaître par transparence au travers de la nacre dans des conditions normales d'illumination.
The method of manufacturing such a dial comprises the steps of:
  1. a) provide a support 2, preferably metallic, for example made of brass
  2. b) provide a mother-of-pearl sheet 3 having a thickness between 50 μm and 300 μm, preferably between 50 μm and 250 μm, preferably between 100 μm and 200 μm, preferably between 120 μm and 180 μm, more preferably between 130 µm and 170 µm, and even more preferably between 140 µm and 160 µm
  3. c) print a pattern 4 on the back face 3b of the mother-of-pearl sheet
  4. d) assemble the printed mother-of-pearl sheet 3 obtained in step c) on the support 2, and the thickness according to step b) being chosen so that the pattern can appear by transparency through the mother-of-pearl under normal conditions of illumination.

Le procédé comprend également une étape pour assembler la bague métallique 6 sur le bord périphérique de la feuille de nacre 3.The method also comprises a step for assembling the metal ring 6 on the peripheral edge of the mother-of-pearl sheet 3.

Aux étapes a) et b), le support 2, la feuille de nacre 3 et la bague 6 sont découpés et préparés pour présenter la forme et les dimensions souhaitées du cadran, ainsi que les épaisseurs conformément à l'invention. On réalise également dans le support 2 et la feuille de nacre 3 les orifices 8 pour le passage de l'axe de l'aiguillage.In steps a) and b), the support 2, the mother-of-pearl sheet 3 and the ring 6 are cut and prepared to present the desired shape and dimensions of the dial, as well as the thicknesses in accordance with the invention. The orifices 8 for the passage of the axis of the switch are also made in the support 2 and the mother-of-pearl sheet 3.

Conformément à l'étape c), on imprime un motif 4 sur la face arrière 3b de la feuille de nacre au moyen d'une encre déposée selon une méthode choisie parmi le groupe comprenant la sérigraphie, la photolithographie, et l'impression jet d'encre. La sérigraphie est particulièrement préférée.In accordance with step c), a pattern 4 is printed on the rear face 3b of the mother-of-pearl sheet by means of an ink deposited according to a method chosen from the group comprising screen printing, photolithography, and jet printing. 'ink. Screen printing is particularly preferred.

D'une manière avantageuse, l'épaisseur de la couche d'encre déposée est comprise entre 10 µm et 40 µm, de préférence entre 20 µm et 30 µm. L'encre utilisée est standard.Advantageously, the thickness of the deposited ink layer is between 10 μm and 40 μm, preferably between 20 μm and 30 μm. The ink used is standard.

De préférence, le procédé d'impression est mis en œuvre pour imprimer un motif constitué par un ensemble de traits de différentes largeurs afin de créer l'apparence d'une structure.Preferably, the printing process is implemented to print a pattern consisting of a set of lines of different widths in order to create the appearance of a structure.

En outre, le procédé de l'invention peut comprendre une étape e) de mise à la teinte de la nacre avant l'étape c) d'impression du motif.In addition, the method of the invention can comprise a step e) of tinting the mother-of-pearl before step c) of printing the pattern.

Une fois la feuille de nacre 3 imprimée obtenue à l'étape c) et la bague 6 assemblée sur le support 2 pour former le cadran 1, la face avant 3a de la feuille de nacre peut être polie pour obtenir une face avant d'aspect lisse. La feuille de nacre 3 est ensuite protégée par un verre saphir (non représenté). Des index ou autres éléments décoratifs peuvent être déposés sur le verre saphir ou sur la feuille de nacre 3.Once the printed mother-of-pearl sheet 3 obtained in step c) and the ring 6 assembled on the support 2 to form the dial 1, the front face 3a of the mother-of-pearl sheet can be polished to obtain a front face. smooth. The mother-of-pearl sheet 3 is then protected by a sapphire crystal (not shown). Indexes or other decorative elements can be placed on the sapphire crystal or on the mother-of-pearl sheet 3.

La présente invention concerne également une pièce d'horlogerie comprenant un cadran tel que décrit ci-dessus. L'invention permet d'obtenir un cadre ultra mince, en nacre décorée d'un motif, tout en préservant le caractère irisé de la nacre et l'aspect lisse de la nacre en face avant. Par transparence au travers de la nacre, le motif apparait plus discret, plus fin et plus élégant. L'invention permet d'obtenir également une pièce d'horlogerie, et notamment une montre, ultra fine, du fait de l'utilisation d'un cadran ultra mince.The present invention also relates to a timepiece comprising a dial as described above. The invention makes it possible to obtain an ultra thin frame, made of mother-of-pearl decorated with a pattern, while preserving the iridescent character of the mother-of-pearl and the smooth appearance of the mother-of-pearl on the front face. By transparency through the mother-of-pearl, the pattern appears more discreet, thinner and more elegant. The invention also makes it possible to obtain a timepiece, and in particular a watch, ultra thin, due to the use of an ultra thin dial.

Claims (13)

  1. Dial (1) for a timepiece comprising a support (2) and a mother-of-pearl sheet (3), the mother-of-pearl sheet (3) having a front face (3a) and a rear face (3b) facing said support (2) and on which a pattern (4) has been printed, characterized in that the mother-of-pearl sheet (3) has a thickness of between 50 µm and 300 µm so that the pattern (4) printed on the rear face (3b) of the mother-of-pearl sheet (3) appears transparently through the mother-of-pearl under normal conditions of illumination.
  2. Dial according to claim 1, characterized in that the mother-of-pearl sheet (3) has a thickness comprised between 50 µm and 250 µm, preferably between 100 µm and 200 µm, preferably between 120 µm and 180 µm, preferably between 130 µm and 170 µm, and more preferably between 140 µm and 160 µm.
  3. Dial according to any of the preceding claims, characterized in that the mother-of-pearl is coloured.
  4. Dial according to any of the preceding claims, characterized in that the printed pattern (4) is formed by a set of lines of different widths.
  5. Dial according to any of the preceding claims, characterized in that the support (2) is metallic.
  6. Method for manufacturing a dial (1) for a timepiece comprising a support (2) and a mother-of-pearl sheet (3) according to any of claims 1 to 5, characterized in that the method includes the steps of:
    a) providing a support (2)
    b) providing a mother-of-pearl sheet (3) having a thickness comprised between 50 µm and 300 µm
    c) printing a pattern (4) on the rear face (3b) of the mother-of-pearl sheet (3)
    d) assembling the printed mother-of-pearl sheet (3) obtained in step c) on the support (2), and the thickness according to the step b) being chosen so that the pattern (4) can appear by transparency through the mother-of-pearl under normal conditions of illumination.
  7. Method according to claim 6, characterized in that the mother-of-pearl sheet (3) has a thickness comprised between 50 µm and 250 µm, preferably between 100 µm and 200 µm, preferably between 120 µm and 180 µm, preferably between 130 µm and 170 µm, and more preferably between 140 µm and 160 µm.
  8. Method according to any of claims 6 to 7, characterized in that the method also includes a step e) of tinting the mother-of-pearl before step c) of printing the pattern.
  9. Method according to any of claims 6 to 8, characterized in that step c) of printing the pattern (4) is achieved using an ink deposited in accordance with a method chosen from the group comprising silk screen printing, photolithography, and inkjet printing.
  10. Method according to claim 9, characterized in that the ink is deposited in a layer with a thickness comprised between 10 µm and 40 µm, preferably between 10 µm and 30 µm.
  11. Method according to any of claims 6 to 10, characterized in that the printed pattern (4) is formed by a set of lines of different widths.
  12. Method according to any of the preceding claims, characterized in that the support (2) is metallic.
  13. Timepiece comprising a dial according to any of claims 1 to 5.
EP18155191.2A 2018-02-05 2018-02-05 Dial for timepiece and method for manufacturing same Active EP3521945B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP18155191.2A EP3521945B1 (en) 2018-02-05 2018-02-05 Dial for timepiece and method for manufacturing same
KR1020207021963A KR20200104386A (en) 2018-02-05 2018-03-06 Dial for timepiece and method of manufacturing the same
US16/963,055 US20200348625A1 (en) 2018-02-05 2018-03-06 Dial for a timepiece and method for manufacturing the same
CN201880086852.3A CN111615671A (en) 2018-02-05 2018-03-06 Dial for a timepiece and method of manufacturing the same
PCT/EP2018/055510 WO2019149384A1 (en) 2018-02-05 2018-03-06 Dial for timepiece and method for producing same
JP2020539720A JP6997328B2 (en) 2018-02-05 2018-03-06 Watch dials and methods for making them
KR1020217004321A KR20210020169A (en) 2018-02-05 2018-03-06 Dial for timepiece and method for producing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18155191.2A EP3521945B1 (en) 2018-02-05 2018-02-05 Dial for timepiece and method for manufacturing same

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EP3521945A1 EP3521945A1 (en) 2019-08-07
EP3521945B1 true EP3521945B1 (en) 2021-04-07

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US (1) US20200348625A1 (en)
EP (1) EP3521945B1 (en)
JP (1) JP6997328B2 (en)
KR (2) KR20210020169A (en)
CN (1) CN111615671A (en)
WO (1) WO2019149384A1 (en)

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Publication number Publication date
EP3521945A1 (en) 2019-08-07
US20200348625A1 (en) 2020-11-05
CN111615671A (en) 2020-09-01
KR20210020169A (en) 2021-02-23
JP6997328B2 (en) 2022-01-17
KR20200104386A (en) 2020-09-03
WO2019149384A1 (en) 2019-08-08
JP2021510820A (en) 2021-04-30

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