3172321

Information

• Patent Grant
• 3172321

• References
• Source

• Patent Number

  3,172,321

• Date Filed

  Not available

• Date Issued

  Tuesday, March 9, 1965
  59 years ago

• CPC

  • B31B1/24 - Making window openings
  • 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
  • B31B2201/908 - involving cutting window openings
  • B31B2219/9048 - involving cutting windows
  • B31B2221/105 - obtained from rhombus shaped sheets
  • Y10S83/911 - Envelope blank forming
  • Y10T83/207 - By suction means
  • Y10T83/2185 - Suction gripper
  • Y10T83/4838 - With anvil backup
  • Y10T83/9312 - Rotatable type

• US Classifications

  • 083 - Cutting
  • 226 - Advancing material of indeterminate length