Patent US3236468A successfully refreshed from Google Patents.
US3236468A
Expired / Lapsed
US
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Tape cartridge
Assignee: Midwestern Instruments Inc
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Filing: 1963-03-11
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Granted: 1966-02-22
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Pierre G Foret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:10
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
IN COMBINATION WITH A MAGNETIC TAPE RECORDER HAVING A PAIR OF ROTATABLE SPINDLES EACH PROVIDED WITH A SUCTION DUCT AND A FACEPLATE: A PANEL HAVING A FASTENER FOR SECURING THE PANEL TO THE RECORDER; A PAIR OF TAPE EACH PROVIDED WITH A FRUSTO-CONICAL BORE AND A PLUG IN THE BORE THEREOF HAVING A CONFIGURATION COMPLEMENTAL TO THE BORE; MEANS ATTACHING THE PLUGS TO THE PANELS; AND RESILIENT MEANS FOR EACH REEL RESPECTIVELY YIELDABLY HOLDING THE SAME IN ENGAGEMENT WITH ITS PLUG, SAID REELS ENGAGING CORRESPONDING FACEPLATES WITH THE REELS HELD OUT OF ENGAGEMENT WITH THEIR PLUGS AGAINST THE ACTION OF SAID RESILIENT MEANS WHEN THE PANEL IS SECURED TO THE RECORDER, THERE BEING A CAVITY BETWEEN EACH REEL AND ITS FACEPLATE COMMUNICATING WITH THE CORRESPONDING DUCT FOR HOLDING A PARTIAL VACUUM THEREIN TO MAINTAIN THE REELS ON THE FACEPLATES FOR ROTATION THEREWITH WHEN THERE IS A NEGATIVE PRESSURE IN THE DUCTS.
References Cited (Backward Citations)
US2998206A
Cited
US2941739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |