3421182

Information

• Patent Grant
• 3421182

• References
• Source

• Patent Number

  3,421,182

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1969
  57 years ago

• CPC

  • B29C47/847 - characterised by differential heating or cooling
  • B29C47/38 - using screws surrounded by a cooperating barrel
  • B29C47/402 - the screws having intermeshing parts
  • B29C47/84 - Heating or cooling the screws
  • B29C47/845 - cooling
  • B30B11/243 - using two or more screws working in the same chamber
  • B30B11/246 - Screw constructions
  • B29C47/0009 - characterised by the shape of the articles

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus