2540000

Information

• Patent Grant
• 2540000

• References
• Source

• Patent Number

  2,540,000

• Date Filed

  Not available

• Date Issued

  Tuesday, January 30, 1951
  74 years ago

• CPC

  • B31C1/02 - Machines therefor having additional mandrels
  • B31B21/00 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from sheets or blanks

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 413 - Sheet metal container making