3915077

Information

• Patent Grant
• 3915077

• References
• Source

• Patent Number

  3,915,077

• Date Filed

  Not available

• Date Issued

  Tuesday, October 28, 1975
  49 years ago

• CPC

  • B31B47/04 - for making envelopes or bags with preshaped bottoms
  • B29C65/18 - using heated tools
  • B29C65/745 - using a single unit having both a severing tool and a welding tool
  • B29C66/004 - Preventing sticking together
  • B29C66/0044 - using a separating sheet
  • B29C66/1122 - Single lap to lap joints
  • B29C66/43121 - Closing the ends of tubular or hollow single articles
  • B29C66/43129 - said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles
  • B29C66/8122 - characterised by the composition of the material constituting the pressing elements
  • B29C66/8226 - Cam mechanisms; Wedges; Eccentric mechanisms
  • B29C66/8227 - using springs
  • B29C66/8324 - Joining or pressing tools pivoting around one axis
  • B29C66/8511 - Bag making machines
  • B31B37/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness of contents from webs
  • B29L2031/7128 - Bags, sacks, sachets
  • B31B2237/20 - the bags having structural provision at the base for thickness of content
  • B31B2237/60 - starting from tubular webs
  • B31B2247/00 - Manual operations or hand tools for making bags or boxes
  • Y10T156/12 - Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

• US Classifications

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