Patent US3921691A successfully refreshed from Google Patents.
US3921691A
Expired / Lapsed
US
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Macrofilamentary yarns and rubber structures reinforced therewith
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-06-13
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Granted: 1975-11-25
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Expires: 1993-06-13
Abstract
Abstract Rubber structures are described which comprise elastomeric material reinforced with synthetic filamentary cord material embedded therein. The cord material comprises a plurality of continuous filaments wherein each of the filaments has a denier of at least 100 and is individually longitudinally twisted prior to plying the individual filaments together into a cord. Such filaments are referred to as macrofilaments and are preferably utilized in rubber structures such as tires.
Inventors
- 👤 Derek Kenyon
- 👤 Donald James Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:13
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/48; B; B60; B60C; B60C9/00; B60C9/0042; B60C9/18; B60C9/1821; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10513; Y10T152/10765; Y10T152/10792; Y10T152/1081
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A rubber structure comprising elastomeric material reinforced with a synthetic filamentary cord embedded therein, said cord comprising a plurality of continuous filaments, each of said filaments having a denier of at least 100 and being individually longitudinally twisted, said individually twisted filaments being further twisted about the other filaments to form a coherent cord of said plurality of filaments.
Claim 2
Dependent Claim
59 words
A rubber structure comprising elastomeric material reinforced with a synthetic filamentary cord embedded therein, said cord comprising a plurality of continuous filaments, each of said filaments having a denier of at least 100 and being individually longitudinally twisted, said individually twisted filaments being further twisted about the other filaments to form a coherent cord of said plurality of filaments.
Claim 3
Dependent Claim
99 words
The rubber structure of claim 1 in the form of a radial-ply pneumatic tire comprising a carcass consisting of radial plies of textile reinforcing material and a tread layer, a breaker structure disposed between the carcass and the tread layer, the breaker structure being formed of at least two plies or layers of parallel macrofilament cords embedded in rubber, each cord comprising a plurality of continuous filaments wherein each of said filaments has a denier of at least 100 and is individually longitudinally twisted, said individually twisted filaments being further twisted about the other filaments to form said cord.
Claim 4
Dependent Claim
13 words
The tire of claim 2 wherein the cords are formed from poly(ethylene terephthalate).
Claim 5
Dependent Claim
13 words
The tire of claim 2 wherein the cords are formed from poly(hexamethylene adipamide).
Claim 6
Dependent Claim
17 words
The tire of claim 2 wherein the total denier of each cord is between 2,000 and 5,000.
Claim 7
Dependent Claim
18 words
The tire of claim 2 wherein staple fibers are dispersed in the rubber between the plies of cord.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |