2730783

Information

• Patent Grant
• 2730783

• References
• Source

• Patent Number

  2,730,783

• Date Filed

  Not available

• Date Issued

  Tuesday, January 17, 1956
  69 years ago

• CPC

  • B28B21/60 - prestressed reinforcements
  • B28B21/00 - Methods or machines specially adapted for the production of tubular articles
  • B28B21/18 - using expansible or retractable mould or core elements
  • B28B21/205 - having a rigid frame inside the inflatable part of the core
  • B28B21/62 - circumferential laterally tensioned
  • B28B21/78 - with heating or cooling means
  • B28B21/82 - built-up from several parts Multiple moulds Moulds with adjustable parts

• US Classifications

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