3473445

Information

• Patent Grant
• 3473445

• References
• Source

• Patent Number

  3,473,445

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1969
  55 years ago

• CPC

  • 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
  • B31D5/0034 - for making valve inserts for bags
  • B65D31/08 - with block bottoms
  • B31B2219/028 - the holders rotating
  • B31B2219/9054 - Applying rigid valves, spouts, or filling tubes
  • B31B2221/20 - the bags having structural provision at the base for thickness of content
  • B31B2221/40 - involving square or cross bottom forming

• US Classifications

  • 493 - Manufacturing container or tube from paper