2570047

Information

• Patent Grant
• 2570047

• References
• Source

• Patent Number

  2,570,047

• Date Filed

  Not available

• Date Issued

  Tuesday, October 2, 1951
  73 years ago

• CPC

  • B31D5/0034 - for making valve inserts for bags
  • B31B29/84 - Forming valves or applying valve inserts
  • B31B2219/28 - Opening or distending bags
  • B31B2219/9054 - Applying rigid valves, spouts, or filling tubes
  • B31B2221/20 - the bags having structural provision at the base for thickness of content
  • B31B2221/405 - the bags having their openings facing transversally to the direction of movement
  • Y10S493/936 - Square bottom

• US Classifications

  • 493 - Manufacturing container or tube from paper