3630337

Information

• Patent Grant
• 3630337

• References
• Source

• Patent Number

  3,630,337

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1971
  53 years ago

• CPC

  • B41J33/48 - comprising two pawls and ratchets, one for each spool
  • B41J33/18 - by ratchet mechanism
  • B41J33/516 - using a reversing-feeler responsive to the tension of the ribbon

• US Classifications

  • 400 - Typewriting machines