3688650

Information

• Patent Grant
• 3688650

• References
• Source

• Patent Number

  3,688,650

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  52 years ago

• CPC

  • B65D31/142 - the filling port being formed by folding a flap connected to a side
  • B29C65/18 - using heated tools
  • B29C65/223 - comprising several heated wires
  • B29C66/4312 - for making flat seams in tubular or hollow articles
  • B29C66/8324 - Joining or pressing tools pivoting around one axis
  • 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
  • B31B2219/9058 - Forming valves integral with the bags
  • B31B2221/20 - the bags having structural provision at the base for thickness of content
  • Y10S493/929 - with valve

• US Classifications

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