3551257

Information

• Patent Grant
• 3551257

• References
• Source

• Patent Number

  3,551,257

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1970
  53 years ago

• CPC

  • B31B23/00 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from webs
  • B29C65/02 - by heating, with or without pressure
  • B29C65/18 - using heated tools
  • B29C66/4312 - for making flat seams in tubular or hollow articles
  • B29C66/83531 - jaws mounted on chains
  • B31B19/64 - by applying heat or pressure
  • B29C65/38 - Impulse heating
  • B31B2219/142 - using tools mounted on belts or chains
  • B31B2219/6038 - using sealing jaws or sealing dies
  • B31B2219/6076 - using tools mounted on a drum
  • B31B2237/10 - the bags having no structural provision at the base for thickness of content
  • Y10T156/12 - Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

• US Classifications

  • 156 - Adhesive bonding and miscellaneous chemical manufacture
  • 219 - Electric heating