US3289906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capstan and pressure shoe
Assignee: Telefunken Patentverwertungs GmbH
•
Filing: 1964-02-13
•
Granted: 1966-12-06
•
Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 Schuller Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:51
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
IN A TAPE RECORDER, A DRIVE ARRANGEMENT FOR A MAGNETIC TAPE HAVING A FRONT WHEREAT THE MAGNETIC LAYER IS PROVIDED AND A BACK, SAID DRIVE ARRANGEMENT COMPRISING A CAPSTAN AND A NON-ROTATABLE SHOE FOR PRESSING THE TAPE AGAINST SAID CAPSTAN, SAID SHOE ENGAGING THE BACK OF THE TAPE AND SAID CAPSTAN ENGAGING THE FRONT OF THE TAPE, SAID SHOE BEING MADE OF A MATERIAL WHICH, WITH REFERENCE TO THE BACK OF THE TAPE, HAS A LOW COEFFICIENT OF FRICTION, THEREBY TO EXERT A LOW DRAG ON THE TAPE, AND SAID CAPSTAN HAVING A PERIPHERAL SURFACE WHICH, WITH REFERENCE TO THE FRONT OF THE TAPE, HAS A HIGH COEFFICIENT OF FRICTION, THEREBY TO ENSURE THAT, WHEN THE TAPE IS PRESSED AGAINST SAID CAPSTAN BY SAID SHOE, THE TAPE IS MOVED AT A SPEED EQUAL TO THE PERIPHERAL SPEED OF SAID CAPSTAN, AND A DRIVING BELT FOR ROTATING SAID CAPSTAN, SAID DRIVING BELT LOOPING ABOUT SAID CAPSTAN AT THE SAME LEVEL AS THAT AT WHICH SAID CAPSTAN IS ENGAGED BY THE TAPE, SAID BELT CONSTITUTING SAID PERIPHERAL SURFACE OF HIGH COEFFICIENT OF FRICTION.
Claim 2
Dependent Claim
181 words
IN A TAPE RECORDER, A DRIVE ARRANGEMENT FOR A MAGNETIC TAPE HAVING A FRONT WHEREAT THE MAGNETIC LAYER IS PROVIDED AND A BACK, SAID DRIVE ARRANGEMENT COMPRISING A CAPSTAN AND A NON-ROTATABLE SHOE FOR PRESSING THE TAPE AGAINST SAID CAPSTAN, SAID SHOE ENGAGING THE BACK OF THE TAPE AND SAID CAPSTAN ENGAGING THE FRONT OF THE TAPE, SAID SHOE BEING MADE OF A MATERIAL WHICH, WITH REFERENCE TO THE BACK OF THE TAPE, HAS A LOW COEFFICIENT OF FRICTION, THEREBY TO EXERT A LOW DRAG ON THE TAPE, AND SAID CAPSTAN HAVING A PERIPHERAL SURFACE WHICH, WITH REFERENCE TO THE FRONT OF THE TAPE, HAS A HIGH COEFFICIENT OF FRICTION, THEREBY TO ENSURE THAT, WHEN THE TAPE IS PRESSED AGAINST SAID CAPSTAN BY SAID SHOE, THE TAPE IS MOVED AT A SPEED EQUAL TO THE PERIPHERAL SPEED OF SAID CAPSTAN, AND A DRIVING BELT FOR ROTATING SAID CAPSTAN, SAID DRIVING BELT LOOPING ABOUT SAID CAPSTAN AT THE SAME LEVEL AS THAT AT WHICH SAID CAPSTAN IS ENGAGED BY THE TAPE, SAID BELT CONSTITUTING SAID PERIPHERAL SURFACE OF HIGH COEFFICIENT OF FRICTION.
References Cited (Backward Citations)
US2096113A
Cited
US2153214A
Cited
US2276494A
Cited
US2272323A
Cited
US2539858A
Cited
US3141593A
Cited
US3042281A
Cited
US2998177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |