Metal founding – Process – Shaping a forming surface
Reexamination Certificate
2006-04-11
2006-04-11
Lavinder, Jack W. (Department: 3677)
Metal founding
Process
Shaping a forming surface
C164S516000, C029S010000, C029S896400
Reexamination Certificate
active
07025110
ABSTRACT:
A piece of jewelry such a pendant is first cast in wax to provide a wax replica thereof. A gemstone is heated above the melting temperature of the wax replica and is pressed therein. Alternatively, the gemstone is positioned on the surface of the wax replica and pressure is applied to the gemstone to partially embed the gemstone in the wax replica surface at room temperature. The wax replica is then used to from the plaster of Paris mold wherein liquid metal is then poured within the plaster of Paris mold to replace the plaster to form the finished product.
REFERENCES:
patent: 531731 (1895-01-01), Marquart
patent: 2790220 (1957-04-01), Fox
patent: 3876511 (1975-04-01), Feller
patent: 5190024 (1993-03-01), Senanayake
patent: 5426836 (1995-06-01), Lynch
patent: 5758517 (1998-06-01), Freilich
patent: 6493912 (2002-12-01), Ho
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