Coded ink recording and reading
Abstract
Abstract A TYPEWRITER OR SIMILAR MACHINE IS PROVIDED WITH A RIBBON HAVING HORIZONTAL ZONES EACH ZONE HAVING AN INK CONTAINING A SINGLE PHOTOLUMINESCENT OR OTHER COLOR SELECTIVE COMPONENT OF A CODE WHICH IS DIFFERENT FROM THAT OF EVERY OTHER HORIZONTAL ZONE IN THE RIBBON. CODE HAMMERS, EITHER ARRANGED ON A TYPE BAR OR A SINGLE HEAD WITH CONTROLLABLE HAMMERS, STRIKE THROUGH GH THE PARTICULAR RIBBON ZONES CORRESPONDING TO THE CODE FOR THE LETTER OR OTHER SYMBOL ON THE TYPEWRITER KEYBOARD. THIS RESULTS IN PRINTING A SERIES OF SMALL, VERTICALLY SPACED MARKS CORRESPONDING TO THE CODE. IF DESIRED AN ADDITIONAL OF THE RIBBON MAY HAVE ORDINARY INK AND A TYPE BAR MAY ALSO HAVE A SHAPED SYMBOL THAT STRIKES THIS ZONE. READOUT IS BY SIMULTANEOUS ILLUMINATION OF ALL OF THE CODE MARKS BY ULTRAVIOLET LIGHT OR IF THERE ARE SOME CODE MARKS WHICH ARE VISIBLE COLORS BY SUCCESSIVE ILLUMINATION WITH ULTRAVIOLET LIGHT AND THEN WITH VISIBLE LIGHT. AS THE WHOLE OF THE CODE MARKING AREA IS ILLUMINATED AT THE SAME TIME THE PROBLEM OF MISALIGNMENT IN READOUT IS ELIMINATED.
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Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |