Patent US2242157A successfully refreshed from Google Patents.
Patent US3948459A successfully refreshed from Google Patents.
US3948459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folded vacuum tanks for high speed magnetic tape recorders
Assignee: Potter Instrument Co Inc
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Filing: 1974-05-01
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Granted: 1976-04-06
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Expires: 1994-05-01
Abstract
Abstract The vacuum buffer tape loop tanks for high speed magnetic recorders formerly made in the form of long, straight channels, are folded into L, U or other more complex shapes whereby much more efficient usee is made of cabinet space for tape handling equipment. Greater acceleration of the tape by the driving capstan is also made possible by the folded tank.
Inventors
- 👤 Robert E. Schoeneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:36
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56; G11B15/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
In a magnetic tape handler, the combination of: a length of magnetic tape; a pair of tape reels. servo means for rotating said reels to wind said tape in a selected direction; vacuum chamber means and tape guiding means for directing said tape along a predetermined path between said reels; a record and/or reproduce head located tangentially to said path between said reels; a tape drive capstan for moving said tape across said head located on one side od said head; wherein said vacuum chamber means is directed around said tape reels and executes at least one turn of the order of 90°; wherein said head is located substantially midway of the tape path between said reels; and wherein said vacuum chamber means is folded symmetrically to substantially surround said reels.
Claim 2
Dependent Claim
131 words
In a magnetic tape handler, the combination of: a length of magnetic tape; a pair of tape reels. servo means for rotating said reels to wind said tape in a selected direction; vacuum chamber means and tape guiding means for directing said tape along a predetermined path between said reels; a record and/or reproduce head located tangentially to said path between said reels; a tape drive capstan for moving said tape across said head located on one side od said head; wherein said vacuum chamber means is directed around said tape reels and executes at least one turn of the order of 90°; wherein said head is located substantially midway of the tape path between said reels; and wherein said vacuum chamber means is folded symmetrically to substantially surround said reels.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |