Title:
Erasure tape mechanism for typewriters
United States Patent 3397767
US Patent References:
Method and means for selectively changing the effective printing surface of type
- - 2694481
Ribbon take-up device for composition machines
- - 3152678
Ribbon shift for error-obliterating typewriters
- - 3154183
Typewriter ribbon control arrangement
- - 3154185
Error-correcting typewriter
- - 3204745
Method and means for selectively changing the effective printing surface of type
- - 2694481
Ribbon take-up device for composition machines
- - 3152678
Ribbon shift for error-obliterating typewriters
- - 3154183
Typewriter ribbon control arrangement
- - 3154185
Error-correcting typewriter
- - 3204745
Inventors:
Hobbs, Robert B.
Publication Date:
08/20/1968
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Primary Class:
Other Classes:
400/236.100, 400/240.100
International Classes:
B41J29/36; B41J35/23; B41J29/26; B41J35/22
US Patent References: