Hollow jewelry ring design

Details Hollow jewelry ring design Hollow jewelry ring design

2006-07-25

2006-07-25

Lin, Kuang Y. (Department: 1725)

Metal founding

Process

Shaping a forming surface

C164S045000, C164S516000

Reexamination Certificate

active

07080678

ABSTRACT:
There is provided a method or process for fabricating a hollow jewelry article which is hollowed or bored out. In accordance with this process, a metal ring model is prepared comprising a solid shank and a metal plate supported along the internal perimeter of the shank by means of a series of spokes extending from the shank. A first metal mold is produced from the metal ring model having the external shape of the jewelry article to be manufactured. From this mold, a wax model of the jewelry article is produced which is first filed down and then cast in order to form a metal model of a core insert; the core insert, like the ring model, has a plate disposed along the perimeter of the shank. This core insert is used to produce a second metal mold. This second mold may then be used repeatedly in order to form a soluble wax core insert model which is then inserted into the cavity of the first mold in order to define the hollow region of the article. A non-soluble wax is then introduced into the first mold for completely surrounding the soluble wax core insert. The non-soluble wax then hardens and the entire unit is removed from the first mold, including the soluble wax core. The core is then removed by a suitable water soluble or chemical mechanism. The remaining wax model contains a hollow core running along a substantial portion of the arcuate length of the shank; the shank has a finger facing surface formed with a plurality of openings which lead to said core. The wax model is then cast in order to form the inventive ring design.

REFERENCES:
patent: 5718278 (1998-02-01), Baum
patent: 6453699 (2002-09-01), Hashimian et al.
patent: 6467526 (2002-10-01), Cope
patent: 6554052 (2003-04-01), Hashimian et al.

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