Apparatus for lifting tape edges above path of rotating head
Abstract
Abstract DISCLOSED HEREIN IS A MANDREL 10A AND 10B ON WHICH TAPE 22 IS HELICALLY WRAPPED 360* ABOUT THE MANDREL. A ROTOR 11 IN THE LONGITUDINAL CENTER OF THE MANDREL CARRIES A MAGNETIC HEAD 12 TO TRANSVERSELY SCAN THE HELICALLY WRAPPED TAPE 32. ENTRY AND EXIT RAMPS 16 AND 22 ON THE MANDREL ARE PROVIDED WHERE THE TAPE ENTERS AND EXITS THE MANDREL. THE FUNCTION OF THESE RAMPS IS TO LIFT THE EDGE OF THE TAPE ADJACENT THE PATH OF THE ROTATING HEAD 12 AS THE HEAD CROSSES THE EDGES OF THE TAPE 32. THIS LIFTING BY THE RAMPS PREVENTS THE HEAD FROM STRIKING THE EDGES OF THE TAPE AND THUS DAMAGING THE HEAD AND THE TAPE. BOTH THE RAMPS AND THE MANDREL ARE MADE FROM POROUS MATERIAL SO AS TO BE AIR BEARING.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |