US3154183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon shift for error-obliterating typewriters
Assignee: Individual
•
Filing: 1962-03-16
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Granted: 1964-10-27
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Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
- 👤 William H Wolowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:28
CPC Classifications
B; B41; B41J; B41J35/00; B41J35/04; B41J35/10; B41J35/12; B41J35/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A TYPEWRITER FOR USE WITH RIBBONS PROVIDING A PRINTING FIELD AND A PRINT-OBLITERATING FIELD, SAID TYPEWRITER INCLUDING CHARACTER-PRINTING MECHANISM, A PAPER SUPPORT MECHANISM, AND SPACING MEANS FOR STEPWISE MOVING SAID MECHANISMS RELATIVE TO ONE ANOTHER IN A FORWARD DIRECTION TO ACCOMPLISH PRINTING OF A LINE OF CHARACTERS, A RIBBON VIBRATOR ACTUATED BY THE PRINTING CONTROL KEYS TO BRING A RIBBON FIELD MOMENTARILY INTO OPERATIVE POSITION UPON ACTUATION OF EACH OF SAID PRINTING CONTROL KEYS, A RIBBON FIELD-SELECTING LEVER OPERABLE BETWEEN TWO DETENTED POSITIONS FOR CONTROLLING THE EXTENT OF MOTION OF THE VIBRATOR TO SELECT THE PARTICULAR RIBBON FIELD THAT IS THUS BROUGHT INTO OPERATIVE POSITION, AND KEY-CONTROLLED BACKSPACE DRIVE MEANS FOR STEPWISE MOVING SAID MECHANISMS RELATIVE TO ONE ANOTHER IN THE BACKWARD DIRECTION IN LETTER-WIDTH IN-
Claim 2
Dependent Claim
126 words
A TYPEWRITER FOR USE WITH RIBBONS PROVIDING A PRINTING FIELD AND A PRINT-OBLITERATING FIELD, SAID TYPEWRITER INCLUDING CHARACTER-PRINTING MECHANISM, A PAPER SUPPORT MECHANISM, AND SPACING MEANS FOR STEPWISE MOVING SAID MECHANISMS RELATIVE TO ONE ANOTHER IN A FORWARD DIRECTION TO ACCOMPLISH PRINTING OF A LINE OF CHARACTERS, A RIBBON VIBRATOR ACTUATED BY THE PRINTING CONTROL KEYS TO BRING A RIBBON FIELD MOMENTARILY INTO OPERATIVE POSITION UPON ACTUATION OF EACH OF SAID PRINTING CONTROL KEYS, A RIBBON FIELD-SELECTING LEVER OPERABLE BETWEEN TWO DETENTED POSITIONS FOR CONTROLLING THE EXTENT OF MOTION OF THE VIBRATOR TO SELECT THE PARTICULAR RIBBON FIELD THAT IS THUS BROUGHT INTO OPERATIVE POSITION, AND KEY-CONTROLLED BACKSPACE DRIVE MEANS FOR STEPWISE MOVING SAID MECHANISMS RELATIVE TO ONE ANOTHER IN THE BACKWARD DIRECTION IN LETTER-WIDTH IN-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |