1839163

Information

• Patent Grant
• 1839163

• References
• Source

• Patent Number

  1,839,163

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1931
  93 years ago

• CPC

  • B31B1/00 - Box, carton, envelope or bag making machinery characterised by performing specific operations
  • B31B2219/2645 - by reciprocating or oscillating members
  • B31B2219/9058 - Forming valves integral with the bags
  • 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