3707170

Information

• Patent Grant
• 3707170

• References
• Source

• Patent Number

  3,707,170

• Date Filed

  Not available

• Date Issued

  Tuesday, December 26, 1972
  52 years ago

• CPC

  • B65H81/08 - by feeding material obliquely to the axis of the core
  • B21C37/121 - with non-welded and non-soldered seams
  • B21C37/124 - the tubes having a special shape
  • B29C63/343 - the tubular sheathing having a deformed non-circular cross-section prior to introduction
  • B29C69/008 - of tubular articles
  • F16L11/16 - wound from profiled strips or bands

• US Classifications

  • 138 - Pipes and tubular conduits
  • 052 - Static structures
  • 072 - Metal deforming