2787022

Information

• Patent Grant
• 2787022

• References
• Source

• Patent Number

  2,787,022

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1957
  67 years ago

• CPC

  • B21C23/01 - starting from material of particular form or shape
  • B21C23/21 - Presses specially adapted for extruding metal
  • B22F3/20 - by extruding
  • B29B7/425 - with screw surrounded by a casing provided with grooves or cavities
  • B29C47/0009 - characterised by the shape of the articles
  • B29C47/38 - using screws surrounded by a cooperating barrel
  • B29C47/6043 - having grooves or cavities
  • B29C47/66 - Barrels or cylinders
  • B29C47/666 - having grooves or cavities
  • B29C47/786 - heating
  • B29C47/825 - cooling
  • B29C47/84 - Heating or cooling the screws
  • B29C47/845 - cooling
  • B29C47/847 - characterised by differential heating or cooling
  • B30B11/24 - using screws or worms

• US Classifications

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