Multi-colored cast jewelry

Details Multi-colored cast jewelry Multi-colored cast jewelry

1995-08-08

1999-09-14

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

B32B 1500

Patent

active

059521139

ABSTRACT:
Multi-colored articles of gold jewelry are cast in one piece by introducing into a casting cavity in a mold, via separate gates from separate sprues and at essentially the same time, separate melts of gold differently alloyed to produce hardened golds of different colors. The melts preferably are of the same gold purity and are alloyed so that the melts have essentially the same density. Novel compositions of green and white gold alloying compositions are described. The articles preferably are cast several at a time in a solid investment casting mold.

REFERENCES:
patent: 2205006 (1940-06-01), Eccles
patent: 3461942 (1969-08-01), Hoffman et al.
patent: 3752212 (1973-08-01), Thompson
patent: 3847203 (1974-11-01), Northwood
patent: 3861454 (1975-01-01), Mezey
patent: 4246954 (1981-01-01), Cohen et al.
patent: 4891276 (1990-01-01), Exner
patent: 5000244 (1991-03-01), Osborne
A. D. Merriman, A Dictionary of Metallurgy, MacDonald & Evans, Ltd., pp. 112, 116 and 389, 1958.

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