2720246

Information

• Patent Grant
• 2720246

• References
• Source

• Patent Number

  2,720,246

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1955
  69 years ago

• CPC

  • B29C65/18 - using heated tools
  • B29C65/305 - involving the use of cartridge heaters
  • B29C66/4312 - for making flat seams in tubular or hollow articles
  • B29C66/8161 - said pressing elements being supported or backed-up by springs or by resilient material
  • B29C66/8181 - characterised by the cooling constructional aspects
  • B29C66/83533 - Cooperating jaws mounted on cooperating chains and moving in a closed path
  • B31B19/64 - by applying heat or pressure
  • 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
  • B65B51/30 - Devices
  • B29C66/71 - characterised by the composition of the plastics material of the parts to be joined
  • B29K2023/06 - PE
  • B29L2031/7128 - Bags, sacks, sachets
  • 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

• US Classifications

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