3686744

Information

• Patent Grant
• 3686744

• References
• Source

• Patent Number

  3,686,744

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1972
  52 years ago

• CPC

  • B29C53/78 - using profiled sheets or strips
  • B21C37/123 - of coated strip material; Making multi-wall tubes
  • B29C63/341 - pressed against the wall by mechanical means
  • B29C69/008 - of tubular articles
  • F16L11/16 - wound from profiled strips or bands
  • Y10T29/49881 - of separate helix [e.g., screw thread]
  • Y10T29/53652 - Tube and coextensive core

• US Classifications

  • 029 - Metal working
  • 493 - Manufacturing container or tube from paper