Inventors:
Douglas M Johnson - Dorr MI, US
Robert E. Leedy - Hastings MI, US
John A. Nobel - Shelbyville MI, US
Assignee:
Middleville Tool & Die Co, Inc - Middleville MI
International Classification:
B21D 39/03, B23P 11/00
US Classification:
29428, 29563, 2988961, 298972, 72 38, 72 45, 72349, 228125, 219 61, 219105
Abstract:
A unique tubular work piece is disclosed along with a novel method and apparatus for manufacturing tubular work pieces from sheet metal stock lighter and stronger structures with less waste and less cost than prior methods.