3721394

Information

• Patent Grant
• 3721394

• References
• Source

• Patent Number

  3,721,394

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  51 years ago

• CPC

  • B21C47/34 - Feeding or guiding devices not specially adapted to a particular type of apparatus
  • B21C47/345 - for monitoring the tension or advance of the material
  • B21C47/3483 - Magnetic field
  • B65H59/046 - varying proportionally to the weight only
  • H02K49/046 - with an axial airgap
  • B65H2555/13 - magnetic
  • B65H2555/23 - magnetic
  • H02K2213/09 - Machines characterised by the presence of elements which are subject to variation

• US Classifications

  • 242 - Winding, tensioning, or guiding