3429237

Information

• Patent Grant
• 3429237

• References
• Source

• Patent Number

  3,429,237

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1969
  56 years ago

• CPC

  • 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
  • B65D27/04 - with apertures or windows for viewing contents
  • B31B2219/9045 - involving applying window patches
  • B31B2221/102 - obtained from essentially rectangular sheets
  • Y10S493/919 - having window
  • Y10T156/1309 - and securing separate part over hole or aperture
  • Y10T156/1759 - Sheet form common base

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 156 - Adhesive bonding and miscellaneous chemical manufacture