EP3521945B1 - Zifferblatt für uhrwerk, und sein herstellungsverfahren - Google Patents

Zifferblatt für uhrwerk, und sein herstellungsverfahren 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
Authority
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
Other languages
English (en)
French (fr)
Other versions
EP3521945A1 (de
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
Original Assignee
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/de
Application filed by Rado Uhren AG filed Critical Rado Uhren AG
Priority to PCT/EP2018/055510 priority patent/WO2019149384A1/fr
Priority to KR1020207021963A priority patent/KR20200104386A/ko
Priority to US16/963,055 priority patent/US12007718B2/en
Priority to KR1020217004321A priority patent/KR20210020169A/ko
Priority to CN201880086852.3A priority patent/CN111615671A/zh
Priority to JP2020539720A priority patent/JP6997328B2/ja
Priority to CN202510194281.7A priority patent/CN119902423A/zh
Publication of EP3521945A1 publication Critical patent/EP3521945A1/de
Application granted granted Critical
Publication of EP3521945B1 publication Critical patent/EP3521945B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 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.

Landscapes

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

Claims (13)

  1. Zifferblatt (1) für ein Uhrmachereiteil, umfassend einen Support (2) und eine Perlmuttfolie (3), wobei die Perlmuttfolie (3) eine vordere Stirnfläche (3a) und eine hintere Stirnfläche (3b) gegenüber dem Support (2) aufweist, und auf der ein Motiv (4) aufgedruckt worden ist, dadurch gekennzeichnet, dass die Perlmuttfolie (3) eine Dicke aufweist, die zwischen 50 um und 300 µm enthalten ist, damit das auf der hinteren Stirnfläche (3b) der Perlmuttfolie (3) aufgedruckte Motiv (4) unter normalen Beleuchtungsbedingungen durch das Perlmutt hindurch durchscheinend erscheint.
  2. Zifferblatt nach Anspruch 1, dadurch gekennzeichnet, dass die Perlmuttfolie (3) eine Dicke aufweist, die zwischen 50 µm und 250 µm, vorzugsweise zwischen 100 µm und 200 µm, vorzugsweise zwischen 120 µm und 180 µm, vorzugsweise zwischen 130 µm und 170 µm und bevorzugter zwischen 140 µm und 160 µm enthalten ist.
  3. Zifferblatt nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Perlmutt gefärbt ist.
  4. Zifferblatt nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das aufgedruckte Motiv (4) aus einer Reihe von Strichen mit unterschiedlicher Breite gebildet ist.
  5. Zifferblatt nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Support (2) metallisch ist.
  6. Verfahren zur Herstellung eines Zifferblattes (1) für ein Uhrmachereiteil, umfassend einen Support (2) und eine Perlmuttfolie (3) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    a) Bereitstellen eines Supports (2)
    b) Bereitstellen einer Perlmuttfolie (3), die eine Dicke aufweist, die zwischen 50 µm und 300 µm enthalten ist
    c) Aufdrucken eines Motivs (4) auf die hintere Stirnfläche (3b) der Perlmuttfolie (3)
    d) Zusammensetzen der in Schritt c) erhaltenen bedruckten Perlmuttfolie (3) auf dem Support (2), und wobei die Dicke gemäß Schritt b) ausgewählt ist, damit das Motiv unter normalen Beleuchtungsbedingungen durch das Perlmutt hindurch durchscheinend erscheinen kann.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Perlmuttfolie (3) eine Dicke aufweist, die zwischen 50 µm und 250 µm, vorzugsweise zwischen 100 µm und 200 µm, vorzugsweise zwischen 120 µm und 180 µm, vorzugsweise zwischen 130 µm und 170 µm und bevorzugter zwischen 140 µm und 160 µm enthalten ist.
  8. Verfahren nach einem der Ansprüche 6 bis 7, dadurch gekennzeichnet, dass es weiter einen Schritt e) des Einfärbens des Perlmutts vor dem Schritt c) des Aufdruckens des Motivs umfasst.
  9. Verfahren nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass der Schritt c) zum Aufdrucken des Motivs (4) mithilfe von einer Tinte durchgeführt wird, die gemäß einem Verfahren aufgetragen wird, das aus der Gruppe ausgewählt wird, die Siebdruck, Fotolithografie und Tintenstrahldruck umfasst.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Tinte entsprechend einer Dickenschicht aufgetragen wird, die zwischen 10 µm und 40 µm, vorzugsweise zwischen 20 µm und 30 µm enthalten ist.
  11. Verfahren nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass das aufgedruckte Motiv (4) durch eine Reihe von Strichen mit unterschiedlicher Breite gebildet ist.
  12. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Support (2) metallisch ist.
  13. Uhrmachereiteil, ein Zifferblatt nach einem der Ansprüche 1 bis 5 umfassend.
EP18155191.2A 2018-02-05 2018-02-05 Zifferblatt für uhrwerk, und sein herstellungsverfahren Active EP3521945B1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP18155191.2A EP3521945B1 (de) 2018-02-05 2018-02-05 Zifferblatt für uhrwerk, und sein herstellungsverfahren
KR1020207021963A KR20200104386A (ko) 2018-02-05 2018-03-06 타임피스용 다이얼 및 이를 제조하는 방법
US16/963,055 US12007718B2 (en) 2018-02-05 2018-03-06 Dial for a timepiece and method for manufacturing the same
KR1020217004321A KR20210020169A (ko) 2018-02-05 2018-03-06 타임피스용 다이얼 및 이를 제조하는 방법
PCT/EP2018/055510 WO2019149384A1 (fr) 2018-02-05 2018-03-06 Cadran pour pièce d'horlogerie et son procédé de fabrication
CN201880086852.3A CN111615671A (zh) 2018-02-05 2018-03-06 用于钟表的表盘及其制造方法
JP2020539720A JP6997328B2 (ja) 2018-02-05 2018-03-06 時計のダイアルおよびこれを製造するための方法
CN202510194281.7A CN119902423A (zh) 2018-02-05 2018-03-06 用于钟表的表盘及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18155191.2A EP3521945B1 (de) 2018-02-05 2018-02-05 Zifferblatt für uhrwerk, und sein herstellungsverfahren

Publications (2)

Publication Number Publication Date
EP3521945A1 EP3521945A1 (de) 2019-08-07
EP3521945B1 true EP3521945B1 (de) 2021-04-07

Family

ID=61163614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18155191.2A Active EP3521945B1 (de) 2018-02-05 2018-02-05 Zifferblatt für uhrwerk, und sein herstellungsverfahren

Country Status (6)

Country Link
US (1) US12007718B2 (de)
EP (1) EP3521945B1 (de)
JP (1) JP6997328B2 (de)
KR (2) KR20210020169A (de)
CN (2) CN111615671A (de)
WO (1) WO2019149384A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2025009127A (ja) 2023-07-07 2025-01-20 セイコーエプソン株式会社 時計用文字板および時計
CH721286A1 (fr) * 2023-11-13 2025-05-30 Arnold & Son Mft La Joux Perret S A Procédé de préparation d'une pièce en ambre et pièce d'horlogerie comportant cette pièce.
JP2025122306A (ja) 2024-02-08 2025-08-21 セイコーエプソン株式会社 時計用部品、時計および時計用部品の製造方法

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
JPH03186789A (ja) * 1989-12-15 1991-08-14 Kawaguchiko Seimitsu Kk 時計用文字板及びその製造方法
JP2000087028A (ja) * 1998-09-14 2000-03-28 Akira Azuma 蓄光体の製造方法
JP2003194966A (ja) 2001-12-27 2003-07-09 Kawaguchiko Seimitsu Co Ltd 時計用文字板及びその製造方法
CH697210A5 (fr) 2003-04-01 2008-06-25 Artecad Sa Cadran.
EP1672436B1 (de) * 2004-12-20 2008-03-19 Rolex S.A. Uhrzifferblatt und Herstellungsverfahren dieses Zifferblattes
JP5177729B2 (ja) * 2005-03-30 2013-04-10 シチズンホールディングス株式会社 計器類用表示板および計器類用表示板の製造方法
US20080123473A1 (en) * 2005-08-10 2008-05-29 Seiko Epson Corporation Electronic component and electronic device
JP2007047030A (ja) * 2005-08-10 2007-02-22 Seiko Epson Corp 計時装置及び計時装置用文字板
JP4920381B2 (ja) 2006-11-22 2012-04-18 シチズンホールディングス株式会社 時計用表示板
JP2009236640A (ja) 2008-03-26 2009-10-15 Seiko Epson Corp 時計用文字板の製造方法、時計用文字板および時計
CN202183016U (zh) * 2011-01-24 2012-04-04 铭泰工业有限公司 夜光表面体
EP2796946A1 (de) * 2013-04-24 2014-10-29 ETA SA Manufacture Horlogère Suisse Uhr mit einer digitalen Informationsanzeigevorrichtung
CH708838B1 (fr) * 2013-11-15 2017-11-30 Swatch Group Res & Dev Ltd Ensemble d'affichage avec un afficheur caché sous un élément semi-réfléchissant.
EP2874024A1 (de) * 2013-11-15 2015-05-20 The Swatch Group Research and Development Ltd. Perlmuttzifferblatt für versteckte Anzeigevorrichtung
JP6249798B2 (ja) 2014-01-31 2017-12-20 シチズン時計株式会社 太陽電池付き時計の文字板及び太陽電池付き時計
EP3195755A1 (de) * 2016-01-22 2017-07-26 Century Time Gems Ltd Uhr, die mit einem dekorativen verkleidungselement aus perlmutt versehen ist
CN206791844U (zh) * 2016-03-16 2017-12-26 斯沃奇集团研究和开发有限公司 首饰或钟表的零件

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Also Published As

Publication number Publication date
WO2019149384A1 (fr) 2019-08-08
CN119902423A (zh) 2025-04-29
KR20210020169A (ko) 2021-02-23
JP2021510820A (ja) 2021-04-30
EP3521945A1 (de) 2019-08-07
US12007718B2 (en) 2024-06-11
US20200348625A1 (en) 2020-11-05
JP6997328B2 (ja) 2022-01-17
CN111615671A (zh) 2020-09-01
KR20200104386A (ko) 2020-09-03

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