WO2003022091A1 - Procede relatif a l'elaboration d'elements metalliques allonges - Google Patents

Procede relatif a l'elaboration d'elements metalliques allonges Download PDF

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Publication number
WO2003022091A1
WO2003022091A1 PCT/IT2002/000564 IT0200564W WO03022091A1 WO 2003022091 A1 WO2003022091 A1 WO 2003022091A1 IT 0200564 W IT0200564 W IT 0200564W WO 03022091 A1 WO03022091 A1 WO 03022091A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubular cover
composite structure
elongated
cover structure
support material
Prior art date
Application number
PCT/IT2002/000564
Other languages
English (en)
Inventor
Pietro Rancan
Original Assignee
Rancangelo De Rancan Dario E Pietro S.N.C.
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 Rancangelo De Rancan Dario E Pietro S.N.C. filed Critical Rancangelo De Rancan Dario E Pietro S.N.C.
Publication of WO2003022091A1 publication Critical patent/WO2003022091A1/fr

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Classifications

    • 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
    • A44C27/006—Metallic coatings
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C15/00—Other forms of jewellery
    • A44C15/0025—Reversible or double face jewellery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Definitions

  • the present invention refers to a method for making elongated metal elements for jewels, and especially precious metal elements.
  • jewel making there is often the problem of making metal-coated, and especially precious metal-coated elements of elongate shape, like, e.g. necklace chokers, bracelets, earring pendants, etc.
  • said coating it is often required that said coating be carried out using metals of different type.
  • the known methods for making elongated elements of the abovedescribed type entail several drawbacks.
  • the technical problem underlying the present invention is to provide a method for making elongated metal elements for jewels overcoming the drawbacks hereto mentioned with reference to the known art.
  • the present invention refers to elongated elements made of any metal, precious or non-precious, suitable for jewel making, like e.g. gold, silver, platinum, steel, titanium, etc.
  • the present invention entails several relevant advantages.
  • the main advantage lies in that the adoption of a hollow core reduces the total weight of the resulting jewel, entailing a greater wearing-on ease thereof and, above all, an economizing, hi fact, geometry, dimensions and aesthetic and mechanic properties of the elongated element being equal, a smaller quantity of metal is required for its making.
  • the reduced weight enables to make a greater variety of jewels, as fewer limits are imposed on their dimensions, cost and wearability.
  • necklaces especially of the so-called "omega" type, having a width remarkably greater with respect to that of the known necklaces.
  • Figures 1 to 9 refer each to a step of a first embodiment of the method of the invention, showing perspective views of the elongated element at the different making steps thereof;
  • Figure 9A is a cross-sectional view of an elongated element made with the method of the invention;
  • Figure 10 is a perspective view of a necklace made with the method of the invention.
  • Figures 11A to 11L refer each to a respective alternative configuration of the cross section of the resulting elongated element
  • Figure 12 refers to a variant embodiment of the invention, showing a perspective view of the elongated element during the making thereof;
  • Figure 13 refers to another variant embodiment of a step of the method of the invention, showing a perspective view of the elongated element during the making thereof.
  • These two foils are of different type, and in particular the one made of yellow gold and the other one of white gold.
  • foils made of a different type of material and/or having different machinings there are meant foils made of a different type of material and/or having different machinings.
  • alternative embodiments could provide the employ of other types of foils, e.g. made the one of glazed metal an the other one of bright metal.
  • these foils 51 and 52 are joined at respective longitudinal edges thereof, to make a tubular cover structure 40 having a substantially circular cross section.
  • This step can be carried out with a known forming machine.
  • the tubular cover structure can be made of a single material and with techniques different from the hereto-illustrated one.
  • the tubular structure 40 in a third step of drawing the tubular structure 40 is deformed by known drawing means so as to assume a desired cross section, hi the present embodiment, it is provided that the tubular structure 40 assume a squashed section, in particular a substantially eye-shaped section.
  • the drawn tubular structure 40 is then sectioned into a plurality of annular elements, each indicated by 43, by a known sectioning machine.
  • a simplified variant of the method provides that the tubular cover structure be not sectioned into rings, remaining a single body.
  • the tubular cover structure may be directly provided in form of rings.
  • a support material 60 like e.g. brass, Copper, tombac alloy, Aluminium, mild steel or a polymeric material.
  • An elongated shape component in the present embodiment a thin precious metal foil, also called strip and indicated by 53, is substantially helically wound about said material 60.
  • this elongated foil 53 has a thickness comprised in a range of about 0.05 - 1 mm, and even more preferably equal to about 0.08 mm.
  • support material 60 has been shown schematically, and merely by way of example, as a single elongated structure.
  • the composite structure made of the elongated foil 53 helically wound about the support material 60 is subjected to forming, in order to provide the composite structure itself with a desired cross section of a shape analogous to that of the tubular cover structure 40 and with dimensions slightly smaller than those of the latter.
  • Variant embodiments may provide different shapes for the cover structure and the composite structure.
  • the use of the support material 60 provides, during the forming, a structural support to the elongated foil 53, preventing a breaking or an undesirable deforming of the latter.
  • the annular elements 43 are then continually inserted onto the entire composite structure abovementioned, so as to be the one adjacent to the other one and to entirely coat the latter.
  • this step could be carried out by an automated process. It will be understood that the composite structure keeps the annular elements 43 inserted thereon perfectly aligned thereamong.
  • the method also provides a step of pressing the annular elements 43 onto the composite structure, which step can be carried out by a suitable mold. This pressing is required in order to reciprocally block the annular elements 43, thereby providing mechanic stability to the end manufact.
  • a solvent material 70 upon ending the insertion of the annular elements 43 onto the composite structure elongated foil 53 - support material 60, the latter is eliminated by a solvent material 70.
  • the type of solvent material depends on the specific support material used.
  • the support material is selected from a group comprising brass, Copper and tombac alloy
  • the solvent material will comprise nitric acid.
  • the support material comprises Aluminium
  • the solvent material will comprise caustic soda.
  • the solvent material will comprise hydrochloric acid.
  • the former is a polymeric material, the latter will be a solution fluid.
  • FIG. 53 forms a hollow core of the end elongated element.
  • this hollow structure be employed as coating of a core 6 made of precious metal , in particular of gold, thereby obtaining an end elongated element indicated by 40' and shown in Figure 9A.
  • the core 6 is inserted into the tubular structure and secured at the longitudinal ends thereof.
  • This core 6 provides a certain flexibility and a satisfactory resistance to tensioning to the entire elongated element 40'.
  • the entity of the elastic deformability of the element is set, according to conventional modes, so as to obtain an easy wear on of the resulting jewel and a certain adaptability thereof to the user's physiognomy.
  • the elongated element 40' can be used to make any one jewel, like e.g. a bracelet, a necklace, an earring pendant, etc.
  • a conventional-type fastening device applied at the two longitudinal ends of elongated element 40' will suffice.
  • the metal elements like e.g. the foils 51, 52 and 53 separately, or the tubular cover structure 40 as a whole, can advantageously be subjected to an annealing treatment in order to malleablize the metal structures enhancing the machinability thereof in the subsequent operative steps.
  • a specific application of the method of the invention lies in the making of double-face jewels, as it will be illustrated hereinafter with reference to the specific case of a necklace, and in particular of a necklace of the so-called omega type.
  • the squashed configuration of the elongated elements 41 and 42 enables the entire choker portion 2 to stably abut onto a user's torso, so as to have each foil 51,
  • the necklace 1 has two display faces, i.e. two faces apt to be placed in sight, of substantially different appearance, and in particular the one made of yellow gold and the other one of white gold.
  • the necklace 1 further comprises a decorative element 3, interposed between the elongated elements 41 and 42 and connected thereto by respective connecting flanges, 61 and 62, respectively.
  • necklaces and in general elongated elements for jewels, of a width ranging from 3 to 100 mm and of a reasonable weight.
  • the method of the invention is susceptible of several variant embodiments alternative to the abovedisclosed ones, some of which will be briefly illustrated hereinafter with reference to the sole aspects differentiating them from the abovedescribed ones.
  • the method prior to the step of forming the tubular cover structure the method can provide a step of surface machining of the outside wall thereof, e.g. in order to obtain decorative engravings thereon.
  • the method may also be effectively applied to the case of tubular cover structures made by joining more than two foils.
  • the step of forming the tubular cover structure and/or the composite structure may provide the cross section of these structures to assume any configuration whatsoever, e.g. substantially oval, circular, rectangular, quadrangular, etc., and to have parallel or slanting sides, as it is illustrated in said Figures 11 A-l 1L.
  • the inner core of the final elongated element may be made of a non-precious metal, and consist of one or more thread-shaped elements reciprocally side by side or plaited, of a strip of wire mesh, of metal fabric or of chain, etc.
  • the elongated component that is helically wound about the support material 60 and forms the hollow core of the final product may consist, rather than of a solid-structure foil or strip, of a perforated foil, indicated by 53' in said Figure.
  • said elongated foil, or strip forming the hollow core of the final elongated element may be replaced by a wire of any section whatsoever, e.g. generally round, half-round, oval or curved, or even by a spiral-wound mesh strip, or even by wires or strips plaited about the support material.
  • a wire of any section whatsoever e.g. generally round, half-round, oval or curved, or even by a spiral-wound mesh strip, or even by wires or strips plaited about the support material.
  • the diameter of the optional wires fomring the hollow core preferably ranges from almost 0.05 to about 1 mm, even more preferably being equal to 0.08 mm.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Adornments (AREA)

Abstract

L'invention concerne un procédé relatif à l'élaboration d'éléments allongés (40'), utilisables en bijouterie, qui comprend les étapes suivantes: utilisation d'au moins deux feuilles (51, 52) de métal précieux de type différent, assemblage de ces feuilles, en leurs bords longitudinaux respectifs, pour réaliser une structure tubulaire (40) de section transversale déterminée, puis utilisation d'une troisième feuille de forme allongée (53) et enroulement sensiblement hélicoïdal de cette troisième feuille autour d'un matériau support (60), pour réaliser une structure composite dont la section transversale est plus petite que la section transversale de la structure tubulaire, de manière à pouvoir insérer la structure composite dans la structure tubulaire, et enfin élimination du matériau support au moyen d'un matériau solvant (70).
PCT/IT2002/000564 2001-09-11 2002-09-04 Procede relatif a l'elaboration d'elements metalliques allonges WO2003022091A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001RM000548A ITRM20010548A1 (it) 2001-09-11 2001-09-11 Metodo per produrre elementi elongati di metallo prezioso.
ITRM2001A000548 2001-09-11

Publications (1)

Publication Number Publication Date
WO2003022091A1 true WO2003022091A1 (fr) 2003-03-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2002/000564 WO2003022091A1 (fr) 2001-09-11 2002-09-04 Procede relatif a l'elaboration d'elements metalliques allonges

Country Status (2)

Country Link
IT (1) ITRM20010548A1 (fr)
WO (1) WO2003022091A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131901A1 (fr) * 2005-06-10 2006-12-14 Rancangelo Di Rancan Dario E Pietro S.N.C. Procede pour la production d'elements de forme allongee pour la fabrication de bijou a quatre faces
WO2007148351A1 (fr) * 2006-06-20 2007-12-27 Rancangelo Di Rancan Dario E Pietro S.N.C. Bijou portable selon deux différentes configurations stables et procédé de fabrication de celui-ci
ITAR20130021A1 (it) * 2013-05-31 2014-12-01 Luca Chimenti Maglia per articoli di gioielleria, oreficeria, argenteria e bigiotteria e suo procedimento realizzativo.
ITPD20130238A1 (it) * 2013-08-30 2015-03-01 C A Oro S N C Di Caoduro Andrea & Carlo Processo per la produzione di monili di oreficeria, gioielleria e/o similari

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611144A (en) * 1996-05-31 1997-03-18 Aurafin Corporation Method of manufacturing unique jewelry and article formed therefrom
EP1016356A1 (fr) * 1998-12-29 2000-07-05 Target S.r.l. Element ornemental et sa méthode de production

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611144A (en) * 1996-05-31 1997-03-18 Aurafin Corporation Method of manufacturing unique jewelry and article formed therefrom
EP1016356A1 (fr) * 1998-12-29 2000-07-05 Target S.r.l. Element ornemental et sa méthode de production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131901A1 (fr) * 2005-06-10 2006-12-14 Rancangelo Di Rancan Dario E Pietro S.N.C. Procede pour la production d'elements de forme allongee pour la fabrication de bijou a quatre faces
WO2007148351A1 (fr) * 2006-06-20 2007-12-27 Rancangelo Di Rancan Dario E Pietro S.N.C. Bijou portable selon deux différentes configurations stables et procédé de fabrication de celui-ci
ITAR20130021A1 (it) * 2013-05-31 2014-12-01 Luca Chimenti Maglia per articoli di gioielleria, oreficeria, argenteria e bigiotteria e suo procedimento realizzativo.
ITPD20130238A1 (it) * 2013-08-30 2015-03-01 C A Oro S N C Di Caoduro Andrea & Carlo Processo per la produzione di monili di oreficeria, gioielleria e/o similari

Also Published As

Publication number Publication date
ITRM20010548A1 (it) 2003-03-11
ITRM20010548A0 (it) 2001-09-11

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