3454441

Information

• Patent Grant
• 3454441

• References
• Source

• Patent Number

  3,454,441

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1969
  55 years ago

• CPC

  • B31B37/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness of contents from webs
  • B31B19/68 - by stitching, stapling or riveting
  • B31B19/82 - Attaching windows
  • B31B19/86 - Forming integral handles or mounting separate handles
  • 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
  • B65D33/02 - Local reinforcements or stiffening inserts
  • B65D33/08 - Hand holes
  • B31B2219/6084 - by stitching, stapling, or riveting
  • B31B2219/9038 - Forming or attaching windows
  • B31B2219/9096 - involving application of reinforcement strips or patches involving reinforcements obtained by folding
  • B31B2237/05 - the bags having multilayered walls
  • B31B2237/10 - the bags having no structural provision at the base for thickness of content
  • B31B2237/60 - starting from tubular webs
  • Y10T156/1056 - Perforating lamina
  • Y10T156/108 - Flash, trim or excess removal

• US Classifications

  • 156 - Adhesive bonding and miscellaneous chemical manufacture
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 383 - Flexible bags