3659981

Information

• Patent Grant
• 3659981

• References
• Source

• Patent Number

  3,659,981

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1972
  52 years ago

• CPC

  • B29C44/30 - Expanding the moulding material between endless belts or rollers
  • B29C44/306 - Longitudinally shaping
  • B29C44/324 - the preformed parts being tubular or folded to a tubular shape

• US Classifications

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