Patent US3616478A successfully refreshed from Google Patents.
US3616478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning magnetic recording tape
Assignee: Computer Link Corp
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Filing: 1970-07-17
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Granted: 1971-11-02
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Expires: 1990-07-17
Abstract
Abstract IN THE TAPE CLEANING APPARATUS DISCLOSED HEREIN, MAGNETIC TAPE IS DRAWN ACROSS A CUTTING EDGE ON A CERAMIC BLADE SO AS TO SLICE ANY ADHERING FOREIGN PARTICLES FROM THE COATED FACE OF THE TAPE. THE BLADE IS CONSTRUCTED IN ELONGATED FROM AND HAS A GENERALLY HOURGLASS-SHAPED CROSS SECTION PROVIDING FOUR PARALLEL CUTTING EDGES, EACH EDGE HAVING AN INCLUDED ANGLE OF ABOUT SIXTY DEGREES. FURTHER, THE PATH OF THE TAPE IS ARRANGED SO THAT IT APPROACHES THE CUTTING EDGE AT AN ANGLE WHICH PRODUCED A CUTTING ACTION RATHER THAN A SCRAPING ACTION.
Inventors
- 👤 William B Martz
- 👤 Leonard L Curado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B23/00; G11B23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |