EP3786722A1 - Verfahren zur dekoration eines mechanischen bauteils - Google Patents

Verfahren zur dekoration eines mechanischen bauteils Download PDF

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Publication number
EP3786722A1
EP3786722A1 EP19193878.6A EP19193878A EP3786722A1 EP 3786722 A1 EP3786722 A1 EP 3786722A1 EP 19193878 A EP19193878 A EP 19193878A EP 3786722 A1 EP3786722 A1 EP 3786722A1
Authority
EP
European Patent Office
Prior art keywords
decorated
mechanical part
masking layer
process according
layer
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.)
Pending
Application number
EP19193878.6A
Other languages
English (en)
French (fr)
Inventor
Alexandre Netuschill
Fabien BONTAZ
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.)
Comadur SA
Original Assignee
Comadur 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.)
Filing date
Publication date
Application filed by Comadur SA filed Critical Comadur SA
Priority to EP19193878.6A priority Critical patent/EP3786722A1/de
Priority to TW109111736A priority patent/TWI764125B/zh
Priority to US16/846,719 priority patent/US11806744B2/en
Priority to JP2020083729A priority patent/JP7051935B2/ja
Priority to KR1020200066656A priority patent/KR102382408B1/ko
Priority to CN202010504610.0A priority patent/CN112442714B/zh
Publication of EP3786722A1 publication Critical patent/EP3786722A1/de
Pending legal-status Critical Current

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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
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • B05D1/322—Removable films used as masks
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/02—Settings for holding gems or the like, e.g. for ornaments or decorations
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/04—Setting gems in jewellery; Setting-tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/227—Removing surface-material, e.g. by engraving, by etching by etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/26—Inlaying with ornamental structures, e.g. niello work, tarsia work
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C25D5/022—Electroplating of selected surface areas using masking means
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/005—Jewels; Clockworks; Coins
    • 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
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • 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
    • G04B19/18—Graduations on the crystal or glass, on the bezel, or on the rim
    • 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
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • 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 present invention relates to a method of decorating a mechanical part. More specifically, the invention relates to a method of decorating a mechanical part used in the field of watchmaking or jewelry.
  • a drawback of the decoration process by means of masks placed on the surface of the mechanical part to be decorated can nevertheless be seen in the fact that one cannot exclude the risk that the mask is not intimately in contact with the surface of the part. machine to be decorated and that when filling the various molds, the filling material leaks somewhat on the surface of the mechanical part, which means that some of these mechanical parts have to be discarded. This is problematic in particular in the case where it is desired to decorate dials for timepieces, since such dials are expensive mechanical parts.
  • the object of the present invention is to remedy the above-mentioned problems as well as others still by proposing a method for decorating mechanical parts such as a watch dial or a bezel which in particular prevents the decorative elements carried over from it. on the surface of the mechanical part to be decorated do not show burrs which must be eliminated, or even which lead to having to discard some of these mechanical parts.
  • the present invention provides a method of decorating a mechanical part such as a dial or a bezel of a timepiece in which the masking layer is directly formed on the surface of the mechanical part to decorate. This ensures that the masking layer is in intimate contact with the surface of the mechanical part to be decorated, so that any risk of sagging of the filling material in which the decorative elements will be made between the layer is avoided. of masking and the surface of the mechanical part to be decorated, which makes it possible to obtain decorative elements defined with great precision. In particular, the shape and thickness of the decor elements are adjusted very precisely.
  • the present invention proceeds from the general inventive idea which consists in forming decorative elements on a surface of a mechanical part to be decorated, in particular watch dials and, more generally, trim elements for timepieces. such as glasses, middle pieces or even bracelet links as well as jewelry.
  • the present invention teaches depositing directly on the surface to be decorated of the mechanical part a mask of the sacrificial type, that is to say a mask intended to be removed at the end of the process. operations of decoration of the mechanical part.
  • the mask Once the mask has been placed in intimate contact with the surface of the mechanical part to be decorated, then structured so as to create openings there that we will fill with the material in which we want the decorative elements to be made, we factory and optionally preparing the surface formed by the top of the mask and the decorative elements, then the mask is removed, typically by etching in a chemical bath.
  • this mechanical part to be decorated is a watch dial 1.
  • this example is given purely for illustration and in no way limiting only, the mechanical part to be decorated being able to be of any type as an element of 'covering for a timepiece (bezel, bracelet link, caseband etc.), a bridge, a plate, an oscillating weight or even an item of jewelry.
  • the only constraint which weighs on this mechanical part which one wishes to decorate is that it must be made of a material whose mechanical properties are not modified in the temperature range brought into play by the process of the invention. In other words, the mechanical part must not deform, soften, or even melt during the decoration operations in accordance with the invention.
  • the watch dial 1 is intended to be embellished with at least one decorative element, the dimensions and thickness of which depend on requirements.
  • the decoration elements can be used to form the hour markers: as illustrated on figure 1 , four first decorative elements 2a of a first dimension can for example be used to mark noon, three o'clock, six o'clock and nine o'clock on the watch dial 1, while eight second decoration elements 2b of a second dimension can be used to mark the other full hours and complete the hour round.
  • a masking layer 6 intended to form a sacrificial type mask (see figure 2 ).
  • the term “sacrificial” is understood to mean a masking layer which, once it has fulfilled its function, will be eliminated.
  • This masking layer 6 will have a thickness which will be a function of the height of which we want the decorative elements 2a, 2b to finally protrude above the surface to be decorated 4 of the watch dial 1 once the machining operations have been completed. .
  • the thickness of the masking layer 6 is set at 400 ⁇ m.
  • This masking layer 6 is deposited on the watch dial 1 by any suitable technique such as galvanic growth.
  • the masking layer 6 can be formed of a polymer layer or a metal layer. In the case where the masking layer 6 is metallic, it can in particular be made of silver, copper or even nickel. It will be noted that, according to a preferred embodiment of the invention, before depositing the masking layer 6, a bonding layer 8 is deposited on the surface to be decorated 4 of the watch dial 1 in order to optimize the adhesion of masking layer 6 (see figure 3 ). Preferably, this bonding layer 8 consists of a chromium layer 10 over which is deposited a layer of gold 12.
  • the bonding layer 8 is, too, preferably deposited by galvanic growth.
  • these openings will be twelve in number, four openings 14a corresponding to the first four decorative elements 2a used to mark twelve o'clock, three o'clock, six o'clock and nine o'clock on the watch dial 1, and eight corresponding openings 14b.
  • the decorative elements 2b used to mark the other full hours and complete the hour circle on the watch dial 1. It is possible that the twelve openings 14a, 14b are of the same shape, for example square or rectangular, but that the dimensions of the four openings 14a are larger than those of the eight openings 14b. These twelve openings 14a, 14b are cut from the masking layer 6 and the bonding layer 8 by any suitable means such as a laser beam.
  • cavities 16 in the surface to be decorated 4 of the watch dial 1 there is etched, through the openings 14a, 14b formed in the masking layer 6 and the bonding layer 8, cavities 16 in the surface to be decorated 4 of the watch dial 1 (see figure 5 ).
  • These cavities 16 which, preferably, are machined at the same time as the openings 14a, 14b, are intended to improve the immobilization of the decorative elements 2a, 2b on the surface to be decorated 4 of the watch dial 1.
  • the depth of these cavities 16 is chosen of the order of 200 ⁇ m.
  • these anchoring means are constituted by at least one face 18 of the wall 20 of the cavity 16 which, with respect to a vertical plane P perpendicular to the surface to be decorated 4 of the watch dial 1, deviates from this vertical plane P as it moves away from said surface to be decorated 4 of the watch dial 1. Thanks to the presence of this inclined face 18, it is understood that once the cavities 16 have been filled with the material filling, the resulting decorative elements 2a, 2b can no longer emerge from the cavities 16 and are thus permanently anchored on the watch dial 1.
  • Another embodiment of the invention which also aims to improve the anchoring of the decorative elements 2a, 2b on the surface to be decorated 4 of the watch dial 1 provides for drilling at least one conical hole 22 in the bottom 24 of the cavities 16, these conical holes 22 flaring towards the rear surface 26 of the watch dial 1, opposite the surface to be decorated 4 (see figure 7 ).
  • drilling at least one conical hole 22 in the bottom 24 of the cavities 16 these conical holes 22 flaring towards the rear surface 26 of the watch dial 1, opposite the surface to be decorated 4 (see figure 7 ).
  • the openings 14a, 14b have been cut, and the cavities 16 possibly engraved, they should be filled with a filling material ( figure 8 ).
  • the filling material may be a crystalline metal or an amorphous metal.
  • an amorphous platinum alloy will preferably be used, or an amorphous palladium alloy or an amorphous zirconium alloy.
  • the filling of the openings 14a, 14b and of the cavities 16 is carried out by hot forming, a technique consisting in adjusting the viscosity of the filling material used to allow complete filling of the openings 14a, 14b and cavities 16 and thus a homogeneous and precise manufacture of the decorative elements 2a, 2b.
  • the production of the decorative elements 2a, 2b by hot forming requires the use of a material such as a metal or a metal alloy, precious or not, preferably made amorphous.
  • a material such as a metal or a metal alloy, precious or not, preferably made amorphous.
  • a metal or a metal alloy whose structure is amorphous, during its cooling and solidification, exhibits less shrinkage phenomena than a metal with a crystalline structure.
  • the use of a material of amorphous structure is particularly advantageous.
  • the material chosen to make the decorative elements 2a, 2b is brought to the liquid state at a temperature above its melting point, then is cooled very quickly in order to prevent the atoms from reorganizing themselves according to a structure. crystalline.
  • the amorphous material is preferably shaped as required.
  • the decorative elements 2a, 2b are intended to form the hour markers, these decorative elements 2a, 2b will, in a large number of cases, be arranged in an annular fashion on the watch dial. 1.
  • the watch dial 1, covered by the masking layer 6, is placed in a heat press and the ring of amorphous material is arranged above the watch dial 1, in correspondence with the openings 14a, 14b to be completed.
  • the whole is then heated to reach a temperature between the glass transition temperature Tg and the crystallization temperature Tx of the amorphous material.
  • Tg glass transition temperature
  • Tx crystallization temperature
  • the amorphous material sees its viscosity increase appreciably without, however, losing its amorphous structure.
  • the ring of amorphous material then becomes easier to shape, so that it can be pressed against the openings 14a, 14b and come to match the geometry of the latter.
  • the amorphous material is cooled quickly enough to maintain its amorphous state.
  • the openings 14a, 14b made in the masking layer 6 are filled by electroplating.
  • This technique is used in the case where it is desired to produce decorative elements 2a, 2b in crystalline metal.
  • a bath is used in which suitable salts and metal ions are dispersed.
  • the electrically conductive watch dial 1 to be decorated is connected to an electrode and then immersed in the bath.
  • an electric current is circulated in the bath under the effect of which a migration of metal ions occurs towards the conductive parts of the watch dial 1 in order to form the decorative elements 2a , 2b.
  • the decorative elements 2a, 2b are produced by injection of a metal.
  • the watch dial 1, covered by the masking layer 6, is placed in an injection machine capable of filling the cavities 16a, 16b with liquid metal in order to create the decorative elements 2a, 2b.
  • the metal used will be brought to a temperature at least higher than its glass transition temperature Tg and will be cooled sufficiently rapidly to prevent its atoms from reorganizing themselves according to a crystalline structure.
  • the masking layer 6 can be leveled to obtain a flat surface parallel to the surface to be decorated 4 watch face 1.
  • the thickness of the masking layer 6 can be set at 400 ⁇ m for example.
  • the thickness of the decorative elements 2a, 2b is therefore also of the order of 400 ⁇ m. If, in the end, it is desired that the thickness of the decorative elements 2a, 2b be 200 ⁇ m above the surface to be decorated 4, this means that there is a surplus of filling material d. '' a thickness of the order of 200 ⁇ m to machine the decorative elements 2a, 2b and perfect their surface condition, in particular by satin-finishing or polishing them (see figure 9 ).
  • the masking layer 6 is removed, typically by etching. in a chemical bath, and the decorative elements 2a, 2b are completely revealed (see figure 10 ).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • ing And Chemical Polishing (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Adornments (AREA)
EP19193878.6A 2019-08-27 2019-08-27 Verfahren zur dekoration eines mechanischen bauteils Pending EP3786722A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19193878.6A EP3786722A1 (de) 2019-08-27 2019-08-27 Verfahren zur dekoration eines mechanischen bauteils
TW109111736A TWI764125B (zh) 2019-08-27 2020-04-08 裝飾機械零件之方法
US16/846,719 US11806744B2 (en) 2019-08-27 2020-04-13 Method for decorating a mechanical part
JP2020083729A JP7051935B2 (ja) 2019-08-27 2020-05-12 機械部品を装飾するための方法
KR1020200066656A KR102382408B1 (ko) 2019-08-27 2020-06-02 기계 부품을 장식하기 위한 방법
CN202010504610.0A CN112442714B (zh) 2019-08-27 2020-06-05 用于装饰机械部件的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19193878.6A EP3786722A1 (de) 2019-08-27 2019-08-27 Verfahren zur dekoration eines mechanischen bauteils

Publications (1)

Publication Number Publication Date
EP3786722A1 true EP3786722A1 (de) 2021-03-03

Family

ID=67777085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19193878.6A Pending EP3786722A1 (de) 2019-08-27 2019-08-27 Verfahren zur dekoration eines mechanischen bauteils

Country Status (6)

Country Link
US (1) US11806744B2 (de)
EP (1) EP3786722A1 (de)
JP (1) JP7051935B2 (de)
KR (1) KR102382408B1 (de)
CN (1) CN112442714B (de)
TW (1) TWI764125B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4206826A1 (de) * 2021-12-30 2023-07-05 Rubattel et Weyermann S.A. Verfahren zur herstellung von appliken auf einem zifferblatt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839659B1 (de) * 2019-12-16 2024-04-03 Rubattel et Weyermann S.A. Verfahren zur dekoration eines mechanischen bauteils

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DE1191592B (de) * 1960-12-19 1965-04-22 Continental Elektro Ind Ag Verfahren zur Herstellung von Zeichen-, insbesondere Teilungs-Traegern
EP2370865A1 (de) 2008-11-28 2011-10-05 The Swatch Group Research and Development Ltd. Verfahren zur dreidimensionalen dekoration
EP2725000A1 (de) * 2012-10-24 2014-04-30 The Swatch Group Research and Development Ltd. Selektiv leitende und mit Metallmaterial beschichtete Keramik
EP3575447A1 (de) * 2018-05-28 2019-12-04 The Swatch Group Research and Development Ltd Herstellungsverfahren eines metalldekoreinsatzes auf einem ziffernblatt, und mit diesem verfahren erzeugtes ziffernblatt

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Publication number Priority date Publication date Assignee Title
DE1191592B (de) * 1960-12-19 1965-04-22 Continental Elektro Ind Ag Verfahren zur Herstellung von Zeichen-, insbesondere Teilungs-Traegern
EP2370865A1 (de) 2008-11-28 2011-10-05 The Swatch Group Research and Development Ltd. Verfahren zur dreidimensionalen dekoration
EP2725000A1 (de) * 2012-10-24 2014-04-30 The Swatch Group Research and Development Ltd. Selektiv leitende und mit Metallmaterial beschichtete Keramik
EP3575447A1 (de) * 2018-05-28 2019-12-04 The Swatch Group Research and Development Ltd Herstellungsverfahren eines metalldekoreinsatzes auf einem ziffernblatt, und mit diesem verfahren erzeugtes ziffernblatt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4206826A1 (de) * 2021-12-30 2023-07-05 Rubattel et Weyermann S.A. Verfahren zur herstellung von appliken auf einem zifferblatt
US11970780B2 (en) 2021-12-30 2024-04-30 Rubattel & Weyermann S.A. Method for manufacturing appliques on a dial

Also Published As

Publication number Publication date
US20210060605A1 (en) 2021-03-04
US11806744B2 (en) 2023-11-07
CN112442714A (zh) 2021-03-05
JP7051935B2 (ja) 2022-04-11
KR20210027052A (ko) 2021-03-10
TWI764125B (zh) 2022-05-11
TW202108272A (zh) 2021-03-01
KR102382408B1 (ko) 2022-04-01
JP2021032877A (ja) 2021-03-01
CN112442714B (zh) 2023-10-13

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