Method and apparatus for forming a wire
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United States of America Patent
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Jan 21, 2003
Grant Date -
Apr 11, 2002
app pub date -
Nov 16, 2001
filing date -
Oct 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A solid wire of precious metal, such as gold, is drawn through a die which has a groove forming element disposed in a drawing channel located between the inlet and outlet of the die. The hollow wire exiting the die has an eccentric longitudinal open groove extending axially along the wire and embraced by a pair of tapered arms or cusps. The solid portion of the hollow wire is provided with a thick wall portion that is particularly adapted for forming diamond cut facets.
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