EP4344575A1 - Bijou et son procédé de fabrication - Google Patents

Bijou et son procédé de fabrication Download PDF

Info

Publication number
EP4344575A1
EP4344575A1 EP22198443.8A EP22198443A EP4344575A1 EP 4344575 A1 EP4344575 A1 EP 4344575A1 EP 22198443 A EP22198443 A EP 22198443A EP 4344575 A1 EP4344575 A1 EP 4344575A1
Authority
EP
European Patent Office
Prior art keywords
jewellery
piece
core
inclusive
hardening
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Withdrawn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
EP22198443.8A
Other languages
German (de)
English (en)
Inventor
Gianluigi Chiarini
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.)
General Preziosi Srl
Original Assignee
General Preziosi Srl
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 General Preziosi Srl filed Critical General Preziosi Srl
Priority to EP22198443.8A priority Critical patent/EP4344575A1/fr
Publication of EP4344575A1 publication Critical patent/EP4344575A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A44C27/001—Materials for manufacturing jewellery
    • A44C27/002—Metallic materials
    • A44C27/003—Metallic alloys
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A44C27/001—Materials for manufacturing jewellery
    • A44C27/005—Coating layers for jewellery
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A44C27/001—Materials for manufacturing jewellery
    • A44C27/008—Materials for manufacturing jewellery having shape memory behavior

Definitions

  • This invention relates to a piece of jewellery, particularly for the jewellery, goldsmith and silversmith sector and to its manufacturing process.
  • omega or omega-shaped bracelets from the shape of the last letters of the Greek alphabet: that is to say, a circular curve with an open portion to allow the user to wear the piece of jewellery.
  • This device does not, therefore, have an opening or closing mechanism but is worn simply by widening the omega which, elastically, returns to the initial position once the user stops forcing it.
  • the purpose of the invention is to overcome the above-mentioned drawbacks of prior art types of jewellery, particularly for the jewellery, goldsmith and silversmith sector, which allows a piece of gold or silver jewellery to be manufactured in a substantially wire-like shape.
  • an aim of the invention is to provide a wire-like piece of jewellery which can be used as an omega-shaped bracelet, without opening or closing means, but which is resistant and long-lasting.
  • Another aim of the invention is to allow a piece of jewellery to be manufactured as an alternative to prior art pieces of jewellery.
  • Yet another aim of the invention is to provide a piece of jewellery, particularly for the jewellery, goldsmith and silversmith sector, with means which are readily available on the market and using materials of common use, in such a way that the device is economically competitive.
  • FIG. 1 shows a preferred embodiment of a piece of jewellery, particularly for the jewellery, goldsmith and silversmith sector, according to the invention, which is identified in its entirety with the numeral 1 and which comprises a core 2 made of a metal alloy with a shape memory, for supporting a covering 3 made of precious metal.
  • the core 2 extends along a direction of extension X in such a way as to substantially follow a portion of a spiral curve.
  • the metal alloy is titanium-based.
  • the metal alloy is made of steel, that is to say, made of an iron-carbon alloy.
  • the metal alloy is of the biocompatible type.
  • the metal alloy has a recovered deformation of between 5% and 10%, inclusive, preferably between 7% and 9.5%, inclusive, more preferably between 8% and 9%, inclusive, even more preferably substantially equal to 8.5%.
  • the covering 3 comprises a metal sheet wound around said core 2.
  • the metal sheet is wound around said core 2 in the form of turns 13', 13", 13" having a winding angle A of between 5° and 20°, inclusive, preferably between 7° and 18°, inclusive, more preferably between 10° and 17°, inclusive, even more preferably between 12° and 15°, inclusive.
  • the winding angle A is a portion of plane between the direction of winding of a turn 13', 13", 13′′′ and the normal Z relative to the direction of extension X passing through the centre C of the spiral curve ( Figure 2 ).
  • the turns 13', 13", 13′′′ of the covering 3 are positioned on the core 2 in such a way that each of them has at least one perimeter edge 13a in contact with the next turn: obviously, the end turns 13′′′ will have a single edge 13a in contact with that of the turn next, the other turns 13" both the edges 13a.
  • the locking means 4 comprise an abutment element 4 designed to be connected to each end 11 of the piece of jewellery 1 and which has a relative housing compartment 5 for the corresponding end portion 2a of the core 2 and for the relative end part 3a of the covering 3.
  • the abutment element 4 comprises a cap 4, substantially tubular, closed in its outermost part, that is to say, on the opposite side relative to the compartment 5, by a thickness 14.
  • the abutment element 4 is associated with the covering 3, for example by means of soldering.
  • a second crucial aspect of the invention relates to the process for making the above-mentioned piece of jewellery.
  • the process comprises the following steps:
  • the temperatures and the hardening times are selected according to the masses and volumes of the objects to be hardened; these objects, once hardened, maintain over time the shape received during the hardening steps even if subjected to twisting of more than 360° are also more compact and the titanium alloy core is integral with the covering shell.
  • the metal core is made of titanium alloy, preferably of nitinol, a metal alloy of per se known type which guarantees a shape memory of the object.
  • the core is made of a shape memory alloy (SMA) of any known type.
  • SMA shape memory alloy
  • the insertion of the core inside the shell is very simple, since the whole occurs in a rectilinear manner, that is to say, the metal core is inserted in a substantially rectilinear direction.
  • This production process allows a piece of jewellery to be obtained which, if subjected to twisting or bending, is able to fully recover (100%) the initial form (shape memory).
  • the titanium steel core gives the piece of jewellery the shape memory which allows it to be used without the use of opening or closing means, that is to say, like an omega-shaped bracelet.
  • Another advantage of the invention is due to the fact that the metal core is particularly resistant and long-lasting, guaranteeing a long life to the piece of jewellery and an excellent efficiency of use.
  • Another advantage of such a piece of jewellery is that it represents a valid and welcome alternative in a sector which is very often repetitive, thus providing a good commercial boost.
  • a further advantage of the invention is due to the fact that with the manufacturing process according to the invention, it is possible to use very thin thicknesses of the precious metal, even less than a tenth of a millimetre, thus allowing the low-cost production of a piece of jewellery made of gold alloy or silver.
  • the materials used, as well as the dimensions may be of any type, depending on requirements, provided that they are consistent with their production purposes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Adornments (AREA)
EP22198443.8A 2022-09-28 2022-09-28 Bijou et son procédé de fabrication Withdrawn EP4344575A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22198443.8A EP4344575A1 (fr) 2022-09-28 2022-09-28 Bijou et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22198443.8A EP4344575A1 (fr) 2022-09-28 2022-09-28 Bijou et son procédé de fabrication

Publications (1)

Publication Number Publication Date
EP4344575A1 true EP4344575A1 (fr) 2024-04-03

Family

ID=84332343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22198443.8A Withdrawn EP4344575A1 (fr) 2022-09-28 2022-09-28 Bijou et son procédé de fabrication

Country Status (1)

Country Link
EP (1) EP4344575A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001286313A (ja) * 2000-04-05 2001-10-16 Ando Seisakusho:Kk 装飾具用ワイヤ
JP2004337297A (ja) * 2003-05-14 2004-12-02 Seberu Piko:Kk 複合線状体型装身具
KR200495112Y1 (ko) * 2020-04-04 2022-03-08 이봉승 형상기억합금을 이용한 장신구 제작방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001286313A (ja) * 2000-04-05 2001-10-16 Ando Seisakusho:Kk 装飾具用ワイヤ
JP2004337297A (ja) * 2003-05-14 2004-12-02 Seberu Piko:Kk 複合線状体型装身具
KR200495112Y1 (ko) * 2020-04-04 2022-03-08 이봉승 형상기억합금을 이용한 장신구 제작방법

Similar Documents

Publication Publication Date Title
JP3577280B2 (ja) 腕時計バンド用アジャストピン及びその製造方法ならびに腕時計バンドの連結構造
US2451749A (en) Bracelet or the like and method of making the same
US8245533B2 (en) Ring and method for wearing
US6910273B2 (en) Manufacturing method for jewelry including shape memory alloy elements
WO2003059199A8 (fr) Extenseur et procedes de sa fabrication (et variantes)
CA2017537A1 (fr) Ressort spirale utilise en orthodontie
US9743725B2 (en) Clasps having a release button and jewelry articles employing same
JPWO1999065354A1 (ja) 腕時計バンド用アジャストピン及びその製造方法ならびに時計バンドの連結構造
EP4344575A1 (fr) Bijou et son procédé de fabrication
US6860097B2 (en) Lightweight omega chain and improved method of manufacture
US239361A (en) Loeenz bissingee
US6745554B2 (en) Lightweight omega chain and improved method of manufacture
TW200938737A (en) Lock ring
JP4072567B2 (ja) 装身具用ワイヤの製造方法
US11659902B2 (en) Low profile expandable ring structure
CN106174917B (zh) 装饰部件和装饰品
US20240279776A1 (en) Alloys and semi-finished products and products containing same
EP2682017B1 (fr) Assemblée polyvalente à configuration variable
US4417437A (en) Watchband formed of tubular metal rods and method of manufacturing same
US1139309A (en) Hoop ear-ring.
EP1188388A1 (fr) Structure d'accouplement de montre-bracelet et montre-bracelet equipé avec cette structure
WO2003022091A1 (fr) Procede relatif a l'elaboration d'elements metalliques allonges
US3082595A (en) Method of making lazy tongs linkage, each link being made from one piece of stock
US6146772A (en) Composite wire for the manufacture of jewelry articles
EP3799761B1 (fr) Bracelet élastique pour articles tels que montres-bracelets et/ou bijoux et/ou bijoux de fantaisie

Legal Events

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

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

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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: 20241005