US3563483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cartridge
Assignee: Sony Corp
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Filing: 1969-02-28
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Granted: 1971-02-16
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Expires: 1989-02-28
Abstract
Abstract In an endless tape cartridge, an endless magnetic tape and an endless slippery tape are coiled on a rotatable spool with their convolutions arranged alternately, and loops of the magnetic and slippery tapes extending between their innermost and outermost convolutions are guided so that at least a portion of the magnetic tape loop is spaced from the slippery tape loop for engagement individually by a tape drive and also, if desired by one or more magnetic transducers.
Inventors
- 👤 Masaaki Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:11
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
In an endless tape cartridge, the combination of a rotatable spool, an endless magnetic tape, an endless tape having a slippery surface, said magnetic tape and said slippery tape being coiled on said spool with their convolutions arranged alternately and with a loop of said magnetic tape extending between the innermost and outermost convolutions thereof and a loop of said slippery tape extending between the innermost and outermost convolutions of said slippery tape, and means guiding said loops of the magnetic and slippery tapes, respectively, so that at least a portion of said loop of magnetic tape is spaced from said loop of slippery tape, and thereby is adapted for engagement individually by a tape drive.
Claim 2
Dependent Claim
116 words
In an endless tape cartridge, the combination of a rotatable spool, an endless magnetic tape, an endless tape having a slippery surface, said magnetic tape and said slippery tape being coiled on said spool with their convolutions arranged alternately and with a loop of said magnetic tape extending between the innermost and outermost convolutions thereof and a loop of said slippery tape extending between the innermost and outermost convolutions of said slippery tape, and means guiding said loops of the magnetic and slippery tapes, respectively, so that at least a portion of said loop of magnetic tape is spaced from said loop of slippery tape, and thereby is adapted for engagement individually by a tape drive.
Claim 3
Dependent Claim
36 words
An endless tape cartridge according to claim 1, in which said magnetic tape consists of a base of nonmagnetic film and a layer of magnetizable material on at least one of the surfaces of said base.
Claim 4
Dependent Claim
23 words
An endless tape cartridge according to claim 2, in which said nonmagnetic base has layers of said magnetizable material on its opposite surfaces.
Claim 5
Dependent Claim
36 words
An endless tape cartridge according to claim 1, in which said slippery tape consists of a base of nonmagnetic film and a layer of low-friction material on at least one of the surfaces of said base.
Claim 6
Dependent Claim
20 words
An endless tape cartridge according to claim 1, in which said slippery tape consists of a film of low-friction material.
Claim 7
Dependent Claim
59 words
An endless tape cartridge according to claim 1, in which said means guiding said loops includes spaced-apart guide members engaged successively by said loop of magnetic tape to establish a run of the latter therebetween for engagement by the tape drive and by magnetic transducer means, and a separate guide member engageable with said loop of the slippery tape.
Claim 8
Dependent Claim
43 words
An endless tape cartridge according to claim 1, further having a drive hub rotatable for fast forwarding of the magnetic tape, and a pinch roller selectively displaceable toward said drive hub for engaging said loop of the magnetic tape with said drive hub.
Claim 9
Dependent Claim
49 words
An endless tape cartridge according to claim 1, in which said loop of the slippery tape is smaller than, and disposed within said loop of the magnetic tape, and said innermost convolution of the slippery tape iS interposed between said innermost convolution of the magnetic tape and said spool.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |