EP1243193A1 - Uhrarmband - Google Patents

Uhrarmband Download PDF

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Publication number
EP1243193A1
EP1243193A1 EP01810289A EP01810289A EP1243193A1 EP 1243193 A1 EP1243193 A1 EP 1243193A1 EP 01810289 A EP01810289 A EP 01810289A EP 01810289 A EP01810289 A EP 01810289A EP 1243193 A1 EP1243193 A1 EP 1243193A1
Authority
EP
European Patent Office
Prior art keywords
bracelet
watch
branches
rubber
insert
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Withdrawn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
EP01810289A
Other languages
English (en)
French (fr)
Inventor
Laurent Rufenacht
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.)
Desco von Schulthess AG
Original Assignee
Desco von Schulthess 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 Desco von Schulthess AG filed Critical Desco von Schulthess AG
Priority to EP01810289A priority Critical patent/EP1243193A1/de
Priority to PCT/IB2002/000824 priority patent/WO2002074123A1/fr
Publication of EP1243193A1 publication Critical patent/EP1243193A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/12—C-spring-type bracelets or wrist-watch holders

Definitions

  • the present invention relates to a bracelet for watch constituted by two elastic branches bent in form of C, a wristwatch and a method of manufacture of this bracelet.
  • This type of watch strap has been known for a long time and has been the subject of numerous forms of execution.
  • the elasticity of the strap keeps the watch around wrist, so there is no need to have a clasp to connect the two ends of the bracelet one to the other.
  • Either the elasticity is conferred by a joint of two rigid curved bracelet strands to the box watch via tension springs close the strands together to tighten them around the wrist, or it is the strands themselves which present elasticity required to tend to close or wind in a circle or more generally an ellipsoid of a smaller section than that of the wrist.
  • he can then be elastic blades or bracelet strands formed of adjacent articulated elements connected by means elastic to give them a curved shape.
  • the object of the present invention is to remedy the less in part to the disadvantages of the above-mentioned solutions.
  • the present invention has first of all for subject a watch strap of the aforementioned type in which said bent elastic branches are formed by rubber. It also relates to a wristwatch equipped with this bracelet, as well as a manufacturing process of this bracelet.
  • this material is that it can be molded, so that the shape, as well as the surface appearance of the bracelet, can be perfectly adapted to aesthetic criteria.
  • the rubber composition can be chosen in function of the desired properties as well from the point of view of its elasticity as of its compatibility to be in skin contact.
  • the use of rubber gives an original character to the wristwatch and the compressibility of the material makes it pleasant by its ability to better fit the shape of the wrist and thus increase areas of wrist contact that a metal blade elastic for example.
  • the ends of the adjacent bracelet in the watch case have an insert made of a non-material compressible, allowing to play the role of interface between the watch case and the rubber strap strands.
  • the molding and overmolding process according to the invention allows to obtain the bracelet branches as well as their means of attachment to the box in one and the same room.
  • the wristwatch illustrated in Figure 1 illustrates the bracelet according to the invention mounted on a watch 3.
  • Each branch 1, 2 of this bracelet is mainly made of rubber molded with a curved shape, so that this branch 1, 2 constantly tends to regain its curved shape initial after being subjected to a deformation, that is to say when you separate its branches from each other to put the wristwatch around the arm.
  • the assembly has a profile C-shaped, the two free ends of the branches 1, 2 not being connected by a clasp. Under these conditions, it it is desirable that the internal section of C is slightly smaller than the wrist around which the watch is called to be worn, so that branches 1 and 2 of the bracelet slightly tighten the wrist, in order to prevent wristwatch to turn around the wrist.
  • each insert 4, respectively 5 is fixed by overmolding at each end of the branches 1, 2 adjacent to the watch case 3.
  • This insert is made of a non-compressible material such as a thermoplastic or a metal.
  • each insert 4, 5 has two parallel passages 6, 7 perpendicular respectively to watch box 3.
  • the section of the part lower 6a, 7a ( Figure 3) of these passages 6, 7 is substantially larger and concentric with these passages 6, 7.
  • These passages 6, 7 are used for fixing screws 8 intended to be screw into the middle of the watch case 3 to fix branches 1, 2. This connection is therefore extremely rigid, so the only deformable elements are the branches 1, 2 in rubber.
  • the rubber is a synthetic rubber of the type nitrile butadiene NBR, while the inserts are made polyamide.
  • the bond between polyamide and nitrile butadiene is obtained by an adhesion agent.
  • Different adhesion promoters can be used such as a composition based on specific silanes with amine functionality and organo-functional silanes having reactive groups, or with groups with an affinity for rubber.
  • HNBR hydrogenated NBR
  • HMT hexamethylene tetramine
  • adhesion agents are applied to surfaces inserts 4, 5 before positioning them in the molds and inject the NBR mixture which is then vulcanized.
  • the branches 1, 2 thus formed are ready to be fixed to the watch case 3 using the fixing screws 8.
  • the bracelet thus formed by molding can advantageously be realized with a decreasing section between the ends of the strap adjacent to the watch case 3 to their respective free ends, thereby giving branches 1, 2 of the bracelet increasing flexibility in the direction of their free ends.
  • the reduction in cross-section of the branches 1, 2 also results much of a decrease in their thickness than in their width, thus combining the desired variation in flexibility with lightening the appearance of the bracelet due to this double thinning.
  • the surface condition of the bracelet can be very precisely the one desired insofar as it reproduces exactly that of the mold by which it is obtained. Thanks to this process of manufacturing, it is possible to make it appear in relief different indications on the bracelet, such as the manufacturer's brand, product origin, or even reasons decorative.

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  • Adornments (AREA)
EP01810289A 2001-03-21 2001-03-21 Uhrarmband Withdrawn EP1243193A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01810289A EP1243193A1 (de) 2001-03-21 2001-03-21 Uhrarmband
PCT/IB2002/000824 WO2002074123A1 (fr) 2001-03-21 2002-03-19 Bracelet pour montre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01810289A EP1243193A1 (de) 2001-03-21 2001-03-21 Uhrarmband

Publications (1)

Publication Number Publication Date
EP1243193A1 true EP1243193A1 (de) 2002-09-25

Family

ID=8183806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01810289A Withdrawn EP1243193A1 (de) 2001-03-21 2001-03-21 Uhrarmband

Country Status (2)

Country Link
EP (1) EP1243193A1 (de)
WO (1) WO2002074123A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103799622A (zh) * 2014-02-21 2014-05-21 英华达（上海）科技有限公司 双层腕带及其制作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968643A (en) * 1974-03-28 1976-07-13 Marcel Curtil Wristwatch case and wristlet assembly
US4060185A (en) * 1974-10-25 1977-11-29 Citizen Watch Co., Ltd. Band for wrist-watch
US4229936A (en) * 1977-04-19 1980-10-28 Fairchild Camera And Instrument Corporation Low-cost watch case and band
US5054299A (en) * 1990-02-28 1991-10-08 Maveety Susan C Jewelry, without fasteners, formed by the wearer by bending from a planar configuration into circular and/or other configurations to be worn as a necklace, bracelet, belt, etc, and reformed many times to serve as the same or other jewelry

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968643A (en) * 1974-03-28 1976-07-13 Marcel Curtil Wristwatch case and wristlet assembly
US4060185A (en) * 1974-10-25 1977-11-29 Citizen Watch Co., Ltd. Band for wrist-watch
US4229936A (en) * 1977-04-19 1980-10-28 Fairchild Camera And Instrument Corporation Low-cost watch case and band
US5054299A (en) * 1990-02-28 1991-10-08 Maveety Susan C Jewelry, without fasteners, formed by the wearer by bending from a planar configuration into circular and/or other configurations to be worn as a necklace, bracelet, belt, etc, and reformed many times to serve as the same or other jewelry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103799622A (zh) * 2014-02-21 2014-05-21 英华达（上海）科技有限公司 双层腕带及其制作方法
CN103799622B (zh) * 2014-02-21 2015-04-29 英华达（上海）科技有限公司 双层腕带及其制作方法

Also Published As

Publication number Publication date
WO2002074123A1 (fr) 2002-09-26

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