3420924

Information

• Patent Grant
• 3420924

• References
• Source

• Patent Number

  3,420,924

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • B29C47/20 - with annular opening
  • B29C47/0054 - Extrusion moulding combined with blow-moulding or thermoforming
  • B29C47/28 - Cross-head annular extrusion nozzles
  • B29C49/0073 - characterised by the parison configuration
  • B29C49/0078 - Parisons having internal or external ribs
  • B29B2911/1434 - Ribs or protrusions
  • B29B2911/1438 - Elliptic or oval cross-section shape
  • B29C47/0023 - Hollow rigid articles having only one tubular passage
  • B29C47/003 - Articles having cross-sectional irregularities

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes