3924521

Information

• Patent Grant
• 3924521

• References
• Source

• Patent Number

  3,924,521

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1975
  49 years ago

• CPC

  • B31B29/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness or contents
  • B31B1/94 - singly or in succession
  • B31B37/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness of contents from webs
  • B31B2201/922 - singly or in succession
  • B31B2221/20 - the bags having structural provision at the base for thickness of content
  • B31B2221/407 - starting from already formed bags
  • B31B2237/20 - the bags having structural provision at the base for thickness of content
  • B31B2237/60 - starting from tubular webs

• US Classifications

  • 493 - Manufacturing container or tube from paper