EP0105841A1 - Werkstreifen zur Herstellung von Komponententrägern für Uhren - Google Patents

Werkstreifen zur Herstellung von Komponententrägern für Uhren Download PDF

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Publication number
EP0105841A1
EP0105841A1 EP83810436A EP83810436A EP0105841A1 EP 0105841 A1 EP0105841 A1 EP 0105841A1 EP 83810436 A EP83810436 A EP 83810436A EP 83810436 A EP83810436 A EP 83810436A EP 0105841 A1 EP0105841 A1 EP 0105841A1
Authority
EP
European Patent Office
Prior art keywords
grid
network
supports
cutouts
cuts
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.)
Withdrawn
Application number
EP83810436A
Other languages
English (en)
French (fr)
Inventor
Clément Meyrat
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.)
Ebauches Electroniques SA
Original Assignee
Ebauches Electroniques 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 Ebauches Electroniques SA filed Critical Ebauches Electroniques SA
Publication of EP0105841A1 publication Critical patent/EP0105841A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/008—Mounting, assembling of components
    • 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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/027—Materials and manufacturing

Definitions

  • the subject of the present invention is a working strip intended for the production of component support for a watch, by overmolding a metal grid cut from a metal strip.
  • the object of the present invention is to provide a solution which does not have this drawback. It is achieved thanks to the fact that the ribbon comprises a plurality of sets of cuts which each comprise a first and a second network of cuts, separated by isthmus.
  • the first network delimits a first grid usable for the manufacture of supports of a first dimension.
  • the second network of cutouts, practiced in the first grid delimits a second grid, usable for the manufacture of supports of a second dimension, smaller than the first.
  • the isthmus constitute cutting points allowing, after overmolding, to extract the supports from the ribbon.
  • the working strip shown in FIG. 1 comprises a metal strip 1 and, practiced in this strip, a plurality of sets of cuts 2, 2 ′, 2 ".
  • Each set comprises first and second networks of cuts 3 and 4
  • the cuts 3 of the first network are separated by isthmus 6, those 4 of the second network by isthmus 7.
  • the first network of cuts 3 delimits a first grid 8, of generally circular shape, in which the second network of cuts 4 is practiced.
  • the second network of cuts 4 delimits a second grid 9, also of generally circular shape, forming an integral part of the grid 8, but of smaller dimension.
  • Each set of cuts further comprises a third network 5.
  • the cutouts 5a define openings inside which will be housed the components of the watch (battery, quartz, motor, etc.). The role of the cutouts 5b will be defined later.
  • the metal strip is advantageously made of stainless steel or nickel silver, the thickness of which is a few tenths of a millimeter (typically 0.3 mm).
  • the cutting networks 3, 4 and 5 are produced by means of a press equipped with a progressive stamping.
  • FIG. 2 represents an example of a large plate 11, produced by molding on the ribbon 1 of FIG. 1 a mass of plastic 10, coating the large grid 8, which extends to the level of the cutouts 3 It appears that the cutouts 5b make it possible to increase the adhesion of the plastic mass 10, thanks to the connections that they create between its upper part 10a and its lower part 10b.
  • the internal dimension of the cutouts 3 is advantageously from 0.2 to 0.5 mm smaller than the external dimension of the plate 11. This gives good cohesion between the plastic material 10a of the upper part of the plate and the material 10b from the bottom.
  • FIG. 3 represents an example of platinum 11, of small dimension, produced by molding on the ribbon 1 a mass of plastic 10 coating the small grid 9 and covering substantially the whole of the second network of cutouts 4.
  • the difference in size between the two types of plates is insufficient to allow the injection mold to be closed in the space of the cutouts 4.
  • the strip 1 is inserted therein and the size of the cuts 3 and 4 is chosen so that the periphery of the plate 11 (FIG. 3) is included in the interval which separates the cuts 3 from the cuts 4.
  • the size of the platinum will preferably be equal to the external dimension of the cutouts 4. The mold comes to rest on part 8a of the grid 8, the latter thus participating in the definition of the injection volume.
  • the plastic used can be a phenylene polysulphide supplemented with glass fibers.
  • FIG. 4 differs from that of the preceding figures in that the larger plate is of round shape, that of smaller dimension of barrel shape.
  • the parts 8a of the grid 8 do not have the shape of a crown sector, as is the case in FIG. 1, but of a crescent. This solution is advantageous for the manufacture of ladies' watches, with calendar when the round plate is used, without calendar in the case of the barrel plate.
  • the grids 8 and 9 are primarily intended to stiffen the plate 11. It is obvious that they could also provide electrical connections between different components associated with the supports, or even include parts playing other mechanical functions, spring jumper or stack clamp for example.
  • the working strip can not only be used as a support for the operations of molding the plate, but also for the operations of assembling the components.
  • the separation of the plate and its support is obtained by cutting the isthmus 6 or 7 depending on whether it is a plate of larger or smaller dimension.
  • This invention makes it possible to continuously manufacture identical strips for two different calibers, the differentiation only taking place during injection. This advantage is all the more significant since the injection operation is much slower than the cutting operation, a single press thus being able to serve several injection machines.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Punching Or Piercing (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP83810436A 1982-10-05 1983-09-28 Werkstreifen zur Herstellung von Komponententrägern für Uhren Withdrawn EP0105841A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH584082 1982-10-05
CH5840/82 1982-10-05

Publications (1)

Publication Number Publication Date
EP0105841A1 true EP0105841A1 (de) 1984-04-18

Family

ID=4300173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810436A Withdrawn EP0105841A1 (de) 1982-10-05 1983-09-28 Werkstreifen zur Herstellung von Komponententrägern für Uhren

Country Status (2)

Country Link
EP (1) EP0105841A1 (de)
JP (1) JPS5999279A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321900A1 (de) * 1987-12-23 1989-06-28 Eta SA Fabriques d'Ebauches Ein aus einem Streifenprofil hergestelltes Uhrenmittelteil
US5369627A (en) * 1987-07-21 1994-11-29 Seiko Epson Corporation Improvements in bearing and frame structure of a timepiece
US5416752A (en) * 1987-07-21 1995-05-16 Seiko Epson Corporation Timepiece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH157097A (fr) * 1931-03-30 1932-09-15 Leon Levy & Freres Sa Procédé de fabrication de plusieurs pièces métalliques de forme non régulière.
US3697816A (en) * 1969-07-05 1972-10-10 Bernhard Beyschlag Apparatebau Electric network and method of making same
FR2356339A1 (fr) * 1975-05-29 1978-01-20 Texas Instruments Inc Module electronique et son procede de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH157097A (fr) * 1931-03-30 1932-09-15 Leon Levy & Freres Sa Procédé de fabrication de plusieurs pièces métalliques de forme non régulière.
US3697816A (en) * 1969-07-05 1972-10-10 Bernhard Beyschlag Apparatebau Electric network and method of making same
FR2356339A1 (fr) * 1975-05-29 1978-01-20 Texas Instruments Inc Module electronique et son procede de fabrication

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369627A (en) * 1987-07-21 1994-11-29 Seiko Epson Corporation Improvements in bearing and frame structure of a timepiece
US5416752A (en) * 1987-07-21 1995-05-16 Seiko Epson Corporation Timepiece
EP0321900A1 (de) * 1987-12-23 1989-06-28 Eta SA Fabriques d'Ebauches Ein aus einem Streifenprofil hergestelltes Uhrenmittelteil
CH672225GA3 (de) * 1987-12-23 1989-11-15
US5077710A (en) * 1987-12-23 1991-12-31 Eta Sa Fabriques D'ebauches Watchcase having caseband fashioned from a contoured strip

Also Published As

Publication number Publication date
JPS5999279A (ja) 1984-06-07

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Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841219

ITF It: translation for a ep patent filed

Owner name: NON E' STATA DESIGNATA L'ITALIA;GUZZI E RAVIZZA S.

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MEYRAT, CLEMENT