EP3521945A1 - 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
EP3521945A1
EP3521945A1 EP18155191.2A EP18155191A EP3521945A1 EP 3521945 A1 EP3521945 A1 EP 3521945A1 EP 18155191 A EP18155191 A EP 18155191A EP 3521945 A1 EP3521945 A1 EP 3521945A1
Authority
EP
European Patent Office
Prior art keywords
mother
pearl
dial
sheet
pattern
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
EP18155191.2A
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German (de)
French (fr)
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EP3521945B1 (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 Uhren AG
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Rado Uhren AG
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 Uhren AG filed Critical Rado Uhren AG
Priority to CN201880086852.3A priority patent/CN111615671A/en
Priority to PCT/EP2018/055510 priority patent/WO2019149384A1/en
Priority to KR1020207021963A priority patent/KR20200104386A/en
Priority to US16/963,055 priority patent/US12007718B2/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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Classifications

    • 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 opposite 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 a visible image 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 on the substrate or be deposited in blind cavities dug in the nacre or in the substrate.
  • the recommended thickness for the mother-of-pearl leaf is 0.4 mm. This thickness is necessary to allow 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 transparently through the mother-of-pearl in the light of day, in a condition of normal illumination. This thickness of mother of pearl gives the dial a significant thickness so that it is not possible to make ultra-thin dials for the manufacture of ultra-thin watches.
  • the object of the present invention is to overcome the drawbacks mentioned above by proposing a mother-of-pearl dial and its manufacturing method 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 transparently through the mother-of-pearl under normal conditions of illumination.
  • 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 brass sheet.
  • the mother-of-pearl sheet has a front face 3a, corresponding to the side visible by the user, and a rear face 3b, positioned opposite the support 2 and on which a pattern 4 has been printed.
  • This metal ring 6 may have, for example, 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 nacre appears transparently through the mother-of-pearl under normal conditions of illumination, especially in grazing light.
  • the nacre 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 about 150 ⁇ m.
  • Such a thickness of the mother-of-pearl sheet is a compromise found by the applicant, on the one hand to preserve the transparency necessary for the pattern printed on the back side of the mother-of-pearl to appear transparently through the mother-of-pearl under normal conditions. illumination, and secondly to avoid breaking the mother-of-pearl sheet, especially when printing the pattern, because of too great fragility.
  • the metal support 2 may for example have a thickness of the order of 200 microns to 250 microns, so that the dial has for example an ultra thin total thickness of 350 microns to 400 microns.
  • the printed pattern 4 can be any type of pattern.
  • the printed pattern is constituted by a set of lines of different widths, to create the appearance of a structure.
  • the pattern may represent the ribs and the structure of a leaf.
  • the nacre used is natural mother-of-pearl.
  • the nacre can be colored.
  • the method also comprises a step for assembling the metal ring 6 on the peripheral edge of the nacre sheet 3.
  • the support 2, the nacre sheet 3 and the ring 6 are cut and prepared to have the desired shape and dimensions of the dial, as well as the thicknesses according to the invention.
  • the holes 2 are also made in the support 2 and the mother-of-pearl sheet 3 for the passage of the axis of the switch.
  • 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 microns and 40 microns, preferably between 20 microns and 30 microns.
  • the ink used is standard.
  • the printing method is implemented to print a pattern consisting of a set of lines of different widths to create the appearance of a structure.
  • the method of the invention may comprise a step e) of tinting the mother-of-pearl before the step c) of printing the pattern.
  • the front face 3a of the mother-of-pearl sheet can be polished to obtain a front face of appearance smooth.
  • the mother-of-pearl sheet 3 is then protected by a sapphire crystal (not shown). Indexes or other decorative elements may 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, mother-of-pearl frame decorated with a motif, while preserving the iridescent nature of the mother-of-pearl and the smooth appearance of the mother-of-pearl on the front face. Through 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 an ultra-thin watch, because of the use of an ultra-thin dial.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Printing Methods (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

L'invention se rapporte à un cadran (1) pour pièce d'horlogerie comprenant un support (2) et une feuille de nacre (3), la feuille de nacre (3) présentant une face avant (3a) et une face arrière (3b) en regard dudit support (2) et sur laquelle un motif (4) a été imprimé. La feuille de nacre (3) présente une épaisseur comprise entre 50 µm et 300 µm pour que le motif (4) imprimé sur la face arrière (3b) de la feuille de nacre (3) apparaisse par transparence au travers de la nacre dans des conditions normales d'illumination.L'invention concerne également un procédé de fabrication d'un tel cadran ainsi qu'une pièce d'horlogerie comportant un tel cadran.The invention relates to a 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. 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 by transparency through the mother-of-pearl in normal conditions of illumination. The invention also relates to a method of manufacturing such a dial as well as a timepiece comprising such a 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 opposite 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 patent CH 697 210. In this document, the pattern is formed by phosphorescent, fluorescent or luminescent light elements in order to form a visible image 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 on the substrate or be deposited in blind cavities dug in the nacre or in the substrate. The recommended thickness for the mother-of-pearl leaf is 0.4 mm. This thickness is necessary to allow 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 transparently through the mother-of-pearl in the light of day, in a condition of normal illumination. This thickness of mother of pearl gives the dial a significant thickness so that it is not possible to make 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 object of the present invention is to overcome the drawbacks mentioned above by proposing a mother-of-pearl dial and its manufacturing method 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.For this purpose, 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 transparently through the mother-of-pearl under normal conditions of illumination.

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, we obtain a mother of pearl dial decorated with an ultra thin pattern while preserving the iridescent nature of mother-of-pearl and the smooth appearance of mother-of-pearl on the front face, visible by 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 particularities and advantages will emerge clearly from the description which is given hereinafter, 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 axis AA 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 brass sheet.

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 by the user, and a rear face 3b, positioned opposite 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 have, for example, 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.According to 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 nacre appears transparently through the mother-of-pearl under normal conditions of illumination, especially in grazing light. Preferably, the nacre 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 about 150 μm. Such a thickness of the mother-of-pearl sheet is a compromise found by the applicant, on the one hand to preserve the transparency necessary for the pattern printed on the back side of the mother-of-pearl to appear transparently through the mother-of-pearl under normal conditions. illumination, and secondly to avoid breaking the mother-of-pearl sheet, especially when printing the pattern, because of too great 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 microns to 250 microns, so that the dial has for example an ultra thin total thickness of 350 microns to 400 microns.

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 is constituted by a set of lines of different widths, to create the appearance of a structure. For example, the pattern may represent the ribs and the structure of a leaf.

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

D'une manière avantageuse, la nacre peut être colorée.Advantageously, the nacre 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.
The method of manufacturing such a dial comprises the steps of:
  1. a) to be provided with a support 2, preferably metal, of brass for example
  2. b) providing a mother-of-pearl sheet 3 having a thickness of 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 side 3b of the mother-of-pearl sheet
  4. d) assembling the printed nacre sheet 3 obtained in step c) on the support 2.

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 nacre 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 nacre sheet 3 and the ring 6 are cut and prepared to have the desired shape and dimensions of the dial, as well as the thicknesses according to the invention. The holes 2 are also made in the support 2 and the mother-of-pearl sheet 3 for the passage of the axis of the switch.

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.According to 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 microns and 40 microns, preferably between 20 microns and 30 microns. The ink used is standard.

De préférence, le procédé d'impression est mis en oeuvre pour imprimer un motif constitué par un ensemble de traits de différentes largeurs afin de créer l'apparence d'une structure.Preferably, the printing method is implemented to print a pattern consisting of a set of lines of different widths 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 may comprise a step e) of tinting the mother-of-pearl before the 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 of appearance smooth. The mother-of-pearl sheet 3 is then protected by a sapphire crystal (not shown). Indexes or other decorative elements may 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, mother-of-pearl frame decorated with a motif, while preserving the iridescent nature of the mother-of-pearl and the smooth appearance of the mother-of-pearl on the front face. Through 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 an ultra-thin watch, because of the use of an ultra-thin dial.

Claims (13)

Cadran (1) pour pièce d'horlogerie comprenant un support (2) et une feuille de nacre (3), la feuille de nacre (3) présentant une face avant (3a) et une face arrière (3b) en regard dudit support (2) et sur laquelle un motif (4) a été imprimé, caractérisé en ce que la feuille de nacre (3) présente une épaisseur comprise entre 50 µm et 300 µm pour que le motif (4) imprimé sur la face arrière (3b) de la feuille de nacre (3) apparaisse par transparence au travers de la nacre dans des conditions normales d'illumination.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 nacre sheet (3) has a thickness of between 50 μm and 300 μm so that the pattern (4) printed on the back side (3b) the mother-of-pearl leaf (3) appears transparently through the mother-of-pearl under normal conditions of illumination. Cadran selon la revendication 1, caractérisé en ce que la feuille de nacre (3) 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, de préférence entre 130 µm et 170 µm, et plus préférentiellement entre 140 µm et 160 µm.Dial according to claim 1, characterized in that the nacre sheet (3) has a thickness of 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 180 μm. μm and 170 μm, and more preferably between 140 μm and 160 μm. Cadran selon l'une des revendications précédentes, caractérisé en ce que la nacre est colorée.Dial according to one of the preceding claims, characterized in that the nacre is colored. Cadran selon l'une des revendications précédentes, caractérisé en ce que le motif imprimé (4) est constitué par un ensemble de traits de différentes largeurs.Dial according to one of the preceding claims, characterized in that the printed pattern (4) is constituted by a set of lines of different widths. Cadran selon l'une des revendications précédentes, caractérisé en ce que le support (2) est métallique.Dial according to one of the preceding claims, characterized in that the support (2) is metallic. Procédé de fabrication d'un cadran (1) pour pièce d'horlogerie comprenant un support (2) et une feuille de nacre (3) selon l'une des revendications 1 à 5, caractérisé en ce qu'il comprend les étapes de : a) se munir d'un support (2) b) se munir d'une feuille de nacre (3) présentant une épaisseur comprise entre 50 µm et 300 µm c) imprimer un motif (4) sur la face arrière (3b) de la feuille de nacre (3) d) assembler la feuille de nacre (3) imprimée obtenue à l'étape c) sur le support (2). A method of manufacturing a dial (1) for a timepiece comprising a support (2) and a nacre sheet (3) according to one of claims 1 to 5, characterized in that it comprises the steps of: a) provide a support (2) b) obtain a mother-of-pearl sheet (3) having a thickness of between 50 μm and 300 μm c) printing a pattern (4) on the back side (3b) of the mother-of-pearl sheet (3) d) assembling the printed nacre sheet (3) obtained in step c) on the support (2). Procédé selon la revendication 6, caractérisé en ce que la feuille de nacre (3) 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, de préférence entre 130 µm et 170 µm, et plus préférentiellement entre 140 µm et 160 µm.Process according to claim 6, characterized in that the nacre sheet (3) has a thickness of 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 180 μm. μm and 170 μm, and more preferably between 140 μm and 160 μm. Procédé selon l'une des revendications 6 à 7, caractérisé en ce qu'il comprend en outre une étape e) de mise à la teinte de la nacre avant l'étape c) d'impression du motif.Method according to one of claims 6 to 7, characterized in that it further comprises a step e) of coloring the mother-of-pearl before the step c) of printing the pattern. Procédé selon l'une des revendications 6 à 8, caractérisé en ce que l'étape c) d'impression du motif (4) est réalisée au moyen d'une encre déposée selon une méthode choisie parmi le groupe comprenant la sérigraphie, la photolithographie, et l'impression jet d'encre.Method according to one of claims 6 to 8, characterized in that the step c) of printing the pattern (4) is performed by means of an ink deposited according to a method chosen from the group comprising screen printing, photolithography , and inkjet printing. Procédé selon la revendication 9, caractérisé en ce que l'encre est déposée selon une couche d'épaisseur comprise entre 10 µm et 40 µm, de préférence entre 20 µm et 30 µm.Process according to Claim 9, characterized in that the ink is deposited in a layer with a thickness of between 10 μm and 40 μm, preferably between 20 μm and 30 μm. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que le motif imprimé (4) est constitué par un ensemble de traits de différentes largeurs.Method according to one of claims 6 to 10, characterized in that the printed pattern (4) consists of a set of lines of different widths. Procédé selon l'une des revendications précédentes, caractérisé en ce que le support (2) est métallique.Method according to one of the preceding claims, characterized in that the support (2) is metallic. Pièce d'horlogerie comprenant un cadran selon l'une des revendications 1 à 5.Timepiece comprising a dial according to one 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
PCT/EP2018/055510 WO2019149384A1 (en) 2018-02-05 2018-03-06 Dial for timepiece and method for producing same
KR1020207021963A KR20200104386A (en) 2018-02-05 2018-03-06 Dial for timepiece and method of manufacturing the same
US16/963,055 US12007718B2 (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
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

Publications (2)

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

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EP18155191.2A Active EP3521945B1 (en) 2018-02-05 2018-02-05 Dial for timepiece and method for manufacturing same

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US (1) US12007718B2 (en)
EP (1) EP3521945B1 (en)
JP (1) JP6997328B2 (en)
KR (2) KR20200104386A (en)
CN (1) CN111615671A (en)
WO (1) WO2019149384A1 (en)

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EP3195755A1 (en) * 2016-01-22 2017-07-26 Century Time Gems Ltd Timepiece provided with a nacre decorative trim part

Also Published As

Publication number Publication date
CN111615671A (en) 2020-09-01
JP2021510820A (en) 2021-04-30
US20200348625A1 (en) 2020-11-05
JP6997328B2 (en) 2022-01-17
EP3521945B1 (en) 2021-04-07
US12007718B2 (en) 2024-06-11
WO2019149384A1 (en) 2019-08-08
KR20210020169A (en) 2021-02-23
KR20200104386A (en) 2020-09-03

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