US Patent:
20080169489, Jul 17, 2008
Inventors:
Robert Raymond Petkovsek - Neillsville WI, US
Louis Hagedorn - Neillsville WI, US
International Classification:
H01L 31/112
H01L 29/80
Abstract:
A method of forming multi-wall tube from a single-wall piece of tube. The multi-wall tube is formed by relative motion between a die shoe and the single-wall tube to deform the material.