3380646

Information

• Patent Grant
• 3380646

• References
• Source

• Patent Number

  3,380,646

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1968
  56 years ago

• CPC

  • B65D75/008 - Standing pouches
  • B29C65/04 - Dielectric heating, e.g. high-frequency welding
  • B29C66/431 - Joining the articles to themselves
  • B29C66/4312 - for making flat seams in tubular or hollow articles
  • B29C66/4322 - by joining a single sheet to itself
  • B29C66/8322 - Joining or pressing tools reciprocating along one axis
  • B31B37/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness of contents from webs
  • B65D31/005 - by folding a single blank to U-shape to form the base of the bag and opposite sides of the body-portion, the remaining sides being formed by extensions of one or more of these opposite sides
  • B65D33/02 - Local reinforcements or stiffening inserts
  • B29C66/43129 - said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles
  • B29C66/7392 - characterised by the material of at least one of the parts being a thermoplastic
  • B31B2237/20 - the bags having structural provision at the base for thickness of content
  • B31B2237/50 - involving joining superimposed webs

• US Classifications

  • 383 - Flexible bags
  • 426 - Food or edible material: processes, compositions, and products
  • 493 - Manufacturing container or tube from paper