3854031

Information

• Patent Grant
• 3854031

• References
• Source

• Patent Number

  3,854,031

• Date Filed

  Not available

• Date Issued

  Tuesday, December 10, 1974
  50 years ago

• CPC

  • B29C65/18 - using heated tools
  • B29C65/229 - characterised by the means for tensioning said heated wire, resistive ribbon, resistive band or resistive strip
  • B29C66/43 - Joining a relatively small portion of the surface of said articles
  • B29C66/8161 - said pressing elements being supported or backed-up by springs or by resilient material
  • B29C66/83513 - cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
  • B29C66/92431 - the pressure, the force or the mechanical power being kept constant over time
  • B29C66/818 - characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
  • B31B2219/028 - the holders rotating
  • B31B2219/924 - the bags being interconnected
  • B31B2221/50 - involving joining superimposed sheets

• US Classifications

  • 219 - Electric heating
  • 493 - Manufacturing container or tube from paper