Patent US4091168A successfully refreshed from Google Patents.
US4091168A
Expired / Lapsed
US
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Leader for magnetic recording tape having coextensive flexible layers with metal laminated therebetween
Assignee: Sony Corp
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Filing: 1976-04-12
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Granted: 1978-05-23
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Expires: 1996-04-12
Abstract
Abstract A tape leader, for example, for magnetic recording tape, is comprised of an electrically conductive metal film of aluminum, copper or the like, which is bonded or laminated between two flexible synthetic resin films, for example, of polyester resin, so as to be protected from damage or corrosion by the flexible resin films. Such tape leader may be detected by a resonance sensor or the like.
Inventors
- 👤 Katsuyoshi Kawamata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/20; G11B23/26; G11B15/00; G11B15/02; G11B15/05; G11B15/06; G11B15/60; G11B15/66; G11B15/665; G11B15/6653; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/19; Y10T428/24; Y10T428/24777; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31529; Y10T428/31678; Y10T428/31681; Y10T428/31721; Y10T428/31725; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A tape leader secured at one end to an end of a recording tape, the tape leader comprising: two coextensive flexible layers of synthetic resin having substantially the same thickness, flexibility, resistance to moisture, resistance to crumpling, and properties of stretch, and a layer of metal material laminated therebetween.
Claim 2
Dependent Claim
49 words
A tape leader secured at one end to an end of a recording tape, the tape leader comprising: two coextensive flexible layers of synthetic resin having substantially the same thickness, flexibility, resistance to moisture, resistance to crumpling, and properties of stretch, and a layer of metal material laminated therebetween.
Claim 3
Dependent Claim
15 words
A tape leader according to claim 1 in which said metal layer is electrically conductive.
Claim 4
Dependent Claim
33 words
A tape leader according to claim 1 in which each of said flexible synthetic resin layers is formed of a material selected from the group consisting of polyester, polyamide, polyimide and acetate resins.
Claim 5
Dependent Claim
31 words
A tape leader according to claim 1 in which each of said flexible synthetic resin layers is bonded to the adjacent surface of said metal layer by a thermosetting epoxy resin.
Claim 6
Dependent Claim
24 words
A tape leader according to claim 1, wherein said metal layer is detectable electronically to distinguish between said recording tape and said tape leader.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |