3509799

Information

• Patent Grant
• 3509799

• References
• Source

• Patent Number

  3,509,799

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1970
  54 years ago

• CPC

  • B31B19/18 - Slitting webs longitudinally
  • B29C53/10 - of blown tubular films
  • B29C65/02 - by heating, with or without pressure
  • B29C65/18 - using heated tools
  • B29C65/305 - involving the use of cartridge heaters
  • B29C65/7435 - the tool being a roller
  • B29C66/3472 - in the plane of the joint
  • B29C66/348 - Avoiding melting or weakening of the zone directly next to the joint area
  • B29C66/4312 - for making flat seams in tubular or hollow articles
  • B29C66/63 - Internally supporting the article during joining
  • B29C66/632 - using a fluid
  • B29C66/80 - General aspects of machine operations or constructions and parts thereof
  • B29C66/81422 - being convex
  • B29C66/81463 - comprising a plurality of single pressing elements
  • B29C66/81811 - of the welding jaws
  • B29C66/81871 - of the welding jaws
  • B29C66/83433 - the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
  • B29C66/83435 - said rollers, cylinders or drums being hollow
  • B29C66/83511 - jaws mounted on rollers, cylinders or drums
  • B29C66/8432 - Machines for making separate joints at the same time mounted in parallel or in series
  • B29C66/91212 - involving measurement means being part of the welding jaws
  • B29C66/91231 - of the joining tool
  • B29C66/91421 - of the joining tools
  • B29C66/91431 - the temperature being kept constant over time
  • B29C66/91641 - the heat or the thermal flux being non-constant over time
  • B29C66/91645 - by steps
  • 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
  • B29C53/385 - using several sheets to form the circumference
  • B29C66/003 - Protecting areas of the parts to be joined from overheating
  • B29C66/1122 - Single lap to lap joints
  • B29C66/137 - Beaded-edge joints or bead seals
  • B29C66/232 - said joint lines being multiple and parallel
  • B29C66/4322 - by joining a single sheet to itself
  • B29C66/71 - characterised by the composition of the plastics material of the parts to be joined
  • B29C66/8167 - Quick change joining tools or surfaces
  • B29C66/8226 - Cam mechanisms; Wedges; Eccentric mechanisms
  • B29C66/83421 - band or belt types
  • B29C66/961 - involving a feedback loop mechanism
  • B29C2793/00 - Shaping techniques involving a cutting or machining operation
  • B29C2793/0045 - Perforating
  • B29L2031/7128 - Bags, sacks, sachets
  • B31B2219/028 - the holders rotating
  • B31B2219/146 - slitting webs longitudinally
  • B31B2219/924 - the bags being interconnected
  • B31B2221/50 - involving joining superimposed sheets
  • B31B2237/10 - the bags having no structural provision at the base for thickness of content

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 053 - Package making