Claims
- 1. An ornamental “Omega” type chain used for the the production of necklaces, bracelets and other products of jewelry, said chain having two faces, characterized by the fact that corresponding to said two faces, said chain has different colors and different workmanship, said chain being worn by making visible one of the two faces.
- 2. The chain according to claim 1 which comprises a plurality of small rings (10) which are inserted on a core (20) made of a fabric, said chain being characterized by the fact that each ring is constituted by two semi-rings (10.1) (10.2) having an arcuate profile and being symmetrical with respect to each other, said rings being integral along the two lateral borders (10.3), said two semi-rings being made of different material and having their external surfaces (10.A) and (10B) worked in a manner to exhibit aesthetic properties different one from the other.
- 3. The chain according to claim 2 characterized by the fact that said semi-rings (10.1) (10.2) are counterposed and are made respectively in white gold and yellow gold.
- 4. The chain according to claim 2 characterized by the fact that rings of different color are used on the same face.
- 5. The chain according to claim 2 characterized by the fact that on the same face some areas are glazed alternating with smooth areas.
- 6. A process for the production of a necklace prepared from the chain according to claim 1 characterized by the fact that it comprises the following phases, in succession:
a) approaching two flat laminae (6A) (6B) one to the other and making them integral by means of an operation of fixed connection, preferably by welding, with or without the supply of material with a laser or other methods presently known, to form a new lamina (7) or a bilamina constituted by two components different one from the other; b) rolling said lamina (7) to transform said bilamina into a tubular element (8), said tubular element having borders, said borders approaching one to the other and becoming integral by means of an operation of fixed connection, preferably by welding, with or without supply of material, with a laser or other methods presently known, said operation of connection causing the formation of a protruding cordon (9) in the interior of said tubular element (8); c) inserting in said tubular element (8) a core (10), which is a necessary operation to achieve the subsequent operations of drawing and calibration; d) passing said tubular element (8) with the core (10) in the interier through a drawing machine (11), whereby said tubular element is transformed into a new tubular element (12) which is in intimate contact with said interior core whereby it is calibrated in its internal diameter and said protruding cordon (9) is eliminated; e) forming a longitudinal line/groove (13) on the external surface of said calibrated tubular element (12) in correspondence of the area of approachment one to the other of the two approached borders, said line/groove being useful in the subsequent operation of drawing/shaping of said tubular element, said line being preferably in the shape of a “V”, said line being obtained by providing the drawing machine with an engraving tooth (14); f) extracting the core (10) from the calibrated cylindrical tubular element (12) by resting it against a plate (15) which has a hole; g) carrying out the drawing/shaping operation which transforms said tubular element (12) which has a circular profile into the tubular element (16) which has an oval profile by inserting said tubular element (12) in a drawing machine (17) and orienting it in such a manner that said line (13) present in the tubular element (12) at the entry is aligned to a reference cut (18) present in the body of the drawing machine (17) to ensure that the two laminae which constitute said tubular element (16) are counterposed at the exit reciprocally symmetrical and the corresponding two borders perfectly approach one to the other; h) subjecting said tubular element (16) to a radial cut to obtain a plurality of small rings (19); i) inserting said rings (19) onto a core (20) whereby a semiworked product of the chain is obtained; and j) pressing said semiworked product whereby each ring (19) which has an oval profile is converted into ring (10) which has an arcuate symmetrical profile whereby the profile of the chain “double face” is obtained.
PENDING APPLICATIONS
[0001] This is a Continuation-in-Part of U.S. Ser. No. 09/536,672 filed Mar. 28, 2000.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09536672 |
Mar 2000 |
US |
Child |
09988904 |
Nov 2001 |
US |