1972789

Information

• Patent Grant
• 1972789

• References
• Source

• Patent Number

  1,972,789

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1934
  90 years ago

• CPC

  • B26F1/40 - using a press
  • B28D1/325 - for making holes in easily splittable working materials
  • B29C51/087 - with at least one of the mould parts comprising independently movable sections
  • B29C51/14 - using multilayered preforms or sheets
  • B26F2001/4427 - combining cutting and forming operations
  • Y10T29/49011 - Commutator or slip ring assembly
  • Y10T156/1044 - of parallel stacked sheets only
  • Y10T156/107 - Punching and bonding pressure application by punch
  • Y10T156/1326 - Severing means or member secured thereto also bonds

• US Classifications

  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 029 - Metal working
  • 156 - Adhesive bonding and miscellaneous chemical manufacture
  • 425 - Plastic article or earthenware shaping or treating: apparatus