EP0127078B1 - Boîte de montre - Google Patents

Boîte de montre Download PDF

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Publication number
EP0127078B1
EP0127078B1 EP84105613A EP84105613A EP0127078B1 EP 0127078 B1 EP0127078 B1 EP 0127078B1 EP 84105613 A EP84105613 A EP 84105613A EP 84105613 A EP84105613 A EP 84105613A EP 0127078 B1 EP0127078 B1 EP 0127078B1
Authority
EP
European Patent Office
Prior art keywords
watch case
layer
coating
glass
copper
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.)
Expired
Application number
EP84105613A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0127078A1 (fr
Inventor
Paul Gogniat
Eric Loth
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
Application filed by Rado Uhren AG filed Critical Rado Uhren AG
Publication of EP0127078A1 publication Critical patent/EP0127078A1/fr
Application granted granted Critical
Publication of EP0127078B1 publication Critical patent/EP0127078B1/fr
Expired 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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses

Definitions

  • the present invention relates to a watch case and it relates more particularly to a watch case which comprises a crystal welded to a metallic element of the box, such as for example a bezel or a middle part.
  • Such a watch case is known for example from European patent application 0 066 538, which teaches to produce, under the glass, in its part located opposite the metallic element of the case, a particular metallic coating.
  • This metallic coating consists of different superposed levels, the first of which is formed by a masking layer, for example of gold, chromium or nickel, the object of which is to safeguard the aesthetics of the box shown by masking the welding area.
  • a second level of the coating is constituted by a stop layer, for example a layer of chromium, which blocks the diffusion of the solder towards the watch glass and thus prevents it from altering the appearance of the first level of the coating.
  • a third level consisting for example of a layer of copper or gold, is superimposed on the previous level, to ensure good adhesion of the solder material to the coating thus formed under the ice.
  • Such a structure has been shown to be particularly effective for the production of aesthetic watch cases, in which a crystal is welded by welding at low temperature to a metallic element.
  • low temperature welding is actually meant brazing by means of a filler material, for example a silver or copper alloy, the melting temperature of which is less than 550 ° C. and preferably between 180 ° C and 250 ° C.
  • the mechanical strength of these assemblies is excellent, the corresponding breakout force being of the order of 6 kg / mm 2.
  • the object of the present invention is therefore to provide a watch case of the previous type, but in which the metal coating has been adapted so as to also allow welding of the watch case at high temperature.
  • the coating comprises an outer layer of the same material as that of the metallic element.
  • This outer layer is preferably made of stainless steel.
  • an intermediate layer with a thickness of a few microns to a few tenths of a mm of a malleable material, that is to say easily deformable, such as for example gold, copper, or copper-based alloys.
  • This intermediate layer also has the effect of avoiding deterioration of the masking layer during the formation of the outer layer, and of promoting the attachment of the outer layer.
  • a watch case comprising a crystal 1, for example made of sapphire, welded to a metal element 2 constituted for example by a middle part or a bezel.
  • the glass comprises, in its part located opposite the metal element 2, a metal coating generally referenced 3.
  • the coating 3 therefore extends between the glass 1 and a layer of solder material 4 which comes into direct contact with the metal element 2.
  • the coating 3 comprises an outer layer 5, which is made of the same material as the element 2.
  • this material consists of stainless steel, the steel corresponding to the American standard AISI 304 being particularly well suited for this use.
  • an intermediate layer 6 with a thickness of a few microns, for example 100 ⁇ m, made of a malleable material.
  • This material is preferably made of gold, or, to reduce the cost of the assembly, copper or a copper-based alloy.
  • This material itself covers a masking layer 7, of a known type, made for example of gold, chromium or nickel. The thickness of this masking layer is less than one micron and preferably of the order of 0.2) im.
  • the glass is introduced into a vacuum enclosure, after its central part has been protected so as to leave only a peripheral zone of its lower surface exposed.
  • the vacuum having been made, a first vaporizing a nickel wire provides a layer perfectly adherent to the glass mask with a thickness of 0.2 It m.
  • a removable copper target is deposited by sputtering, by means of a removable copper target.
  • ble a 100 ⁇ m thick layer of copper over the nickel layer.
  • the adhesion of the intermediate layer thus formed on the masking layer is improved by a diffusion heat treatment, also carried out in the enclosure, by raising the glass to a temperature between 400 "and 600 ° C. for a period of 20
  • the copper target is replaced by an AISI 304 steel target, and a new sputtering operation is carried out until the outer layer thus deposited on the intermediate layer reaches a thickness of 0.3 mm.
  • the glass provided with its metallic coating is extracted from the enclosure, and the glass is placed on the telescope, after interposition of a high temperature solder material in the solid state, for example in the form of wires, glitter, etc.
  • the assembly thus formed is placed in an oven, for example with a controlled atmosphere, and brought to the melting temperature of the solder material, then cooled.
  • the glass is metallized in a conventional enclosure, by vacuum evaporation, so as to deposit an adherent layer, visible from the outside of the box, in nickel, chromium or gold for example, this layer being able to form decorative nets or patterns.
  • a stainless layer of about 0.21 m of gold is then deposited.
  • the ice then being extracted from the enclosure, and treated to spare its surface which does not have to be coated, it receives, on top of the already formed layer, a layer of copper, deposited by galvanic means, with a thickness of 0.5 mm approximately which is then subjected to a diffusion heat treatment at 420 ° C for 20 min.
  • the ice is placed in a suitable PVD enclosure and coated by cathode sputtering with a thickness of 0.5 mm of stainless steel.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Physical Vapour Deposition (AREA)
  • Surface Treatment Of Glass (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Telephone Function (AREA)
  • Laminated Bodies (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Electric Clocks (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP84105613A 1983-05-19 1984-05-17 Boîte de montre Expired EP0127078B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2743/83 1983-05-19
CH274383A CH652270GA3 (ko) 1983-05-19 1983-05-19

Publications (2)

Publication Number Publication Date
EP0127078A1 EP0127078A1 (fr) 1984-12-05
EP0127078B1 true EP0127078B1 (fr) 1987-08-26

Family

ID=4240611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105613A Expired EP0127078B1 (fr) 1983-05-19 1984-05-17 Boîte de montre

Country Status (6)

Country Link
US (1) US4518093A (ko)
EP (1) EP0127078B1 (ko)
JP (1) JPS59217655A (ko)
CH (1) CH652270GA3 (ko)
DE (1) DE3465642D1 (ko)
HK (1) HK100892A (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1231751B (it) * 1989-04-12 1991-12-21 Sigma Tau Ind Farmaceuti Procedimento per la produzione di r(+) amminocarnitina e s(-) amminocarnitina
CH678680GA3 (en) * 1990-02-20 1991-10-31 Watch glass mounting - has a deposited metal layer between decorative layer and solder to prevent visible effects of soldering
DE69218004T2 (de) * 1992-12-09 1997-06-12 Nippon Denso Co Flussmittelloses lötverfahren
CH685034B5 (de) * 1993-04-29 1995-09-15 Flury Pvd Ecd Duennschichttech Verfahren zur Herstellung eines lötfähigen Schichtsystems auf Glas.
WO2015104252A2 (fr) * 2014-01-07 2015-07-16 Cartier Création Studio Sa Procédé de fixation d'une glace sur une boîte de montre

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519264C (de) * 1924-09-13 1931-02-26 Aeg Verfahren zur hochvakuumdichten, spannungsfreien Verbindung von Metallteilen mit Glas- oder Quarzteilen
CH239903A (de) * 1944-04-15 1945-11-30 Bank Fuer Elektrische Unterneh Verfahren zur Herstellung einer Verbindung zwischen einem Glasteil und einem Metallteil und nach dem Verfahren hergestellte Verbindung.
US3137385A (en) * 1960-09-21 1964-06-16 Raytheon Co Titanium ceramic bond using an intermediate layer of nickel
CA1148360A (en) * 1980-04-04 1983-06-21 James F. Nejedlik Flux-less soldering of glass to metal
JPS6113991Y2 (ko) * 1980-04-24 1986-04-30
CH649435GA3 (ko) * 1981-05-22 1985-05-31

Also Published As

Publication number Publication date
JPS59217655A (ja) 1984-12-07
CH652270GA3 (ko) 1985-11-15
JPH059382B2 (ko) 1993-02-04
EP0127078A1 (fr) 1984-12-05
HK100892A (en) 1992-12-24
DE3465642D1 (en) 1987-10-01
US4518093A (en) 1985-05-21

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