3574891

Information

• Patent Grant
• 3574891

• References
• Source

• Patent Number

  3,574,891

• Date Filed

  Not available

• Date Issued

  Tuesday, April 13, 1971
  54 years ago

• CPC

  • B29C47/761 - the vented material being in liquid form
  • B29C47/38 - using screws surrounded by a cooperating barrel
  • B29C47/66 - Barrels or cylinders
  • B30B9/12 - using pressing worms or screws co-operating with a permeable casing
  • B29C47/0009 - characterised by the shape of the articles
  • B29C47/0021 - Flat flexible articles

• US Classifications

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