Collapsible mandrel
United States Patent 2633978
US Patent References:
/0961128.html
- - 0961128
Circular-seam-welding apparatus
- - 1696455
Collapsible draw mandrel
- - 1713962
Method of making a tubular article
- - 2132565
Process and apparatus for expanding tubes
- - 2234863
/0961128.html
- - 0961128
Circular-seam-welding apparatus
- - 1696455
Collapsible draw mandrel
- - 1713962
Method of making a tubular article
- - 2132565
Process and apparatus for expanding tubes
- - 2234863
Inventors:
George, Brown Russell
Publication Date:
04/07/1953
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Export Citation:
Assignee:
ALUMINUM CO OF AMERICA
Primary Class:
Other Classes:
72/466.900, 72/284
International Classes:
B21C3/16; B21C3/00