3237534

Information

• Patent Grant
• 3237534

• References
• Source

• Patent Number

  3,237,534

• Date Filed

  Not available

• Date Issued

  Tuesday, March 1, 1966
  59 years ago

• CPC

  • B65D31/14 - Valve bags
  • B29C65/02 - by heating, with or without pressure
  • B29C66/43121 - Closing the ends of tubular or hollow single articles
  • B31B29/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness or contents
  • B31B29/84 - Forming valves or applying valve inserts
  • B65D31/08 - with block bottoms
  • B31B2219/9054 - Applying rigid valves, spouts, or filling tubes
  • B31B2221/20 - the bags having structural provision at the base for thickness of content

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 383 - Flexible bags