Patent US4720943A successfully refreshed from Google Patents.
US4720943A
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Cord structure
Assignee: Solutia Inc
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Filing: 1986-11-03
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Granted: 1988-01-26
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Expires: 2006-11-03
Abstract
Abstract Cord useful in the reinforcement of pneumatic tires is provided that is less expensive than conventional cord used for that purpose. A typical cord consists of a core composed of two continuous filament nylon yarns having little or no twist, laid side-by-side and held together by another continuous filament nylon yarn wound helically around the two core yarns.
Inventors
- 👤 Harold D. Arrant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:13
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/26; D02G3/28; D02G3/44; D02G3/48; D02G3/38; D02G3/385; Y; Y10; Y10S; Y10S57/00; Y10S57/902
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
58 words
A tire cord comprising (1) a core consisting of at least one drawn, oriented yarn composed of continuous filaments of a synthetic polymer, wherein said drawn, oriented yarn(s) each contains less than four turns of twist per inch of yarn length and (2) a wrapper yarn wound helically around said core forming spaced-apart helices along the length thereof.
Claim 2
Dependent Claim
58 words
A tire cord comprising (1) a core consisting of at least one drawn, oriented yarn composed of continuous filaments of a synthetic polymer, wherein said drawn, oriented yarn(s) each contains less than four turns of twist per inch of yarn length and (2) a wrapper yarn wound helically around said core forming spaced-apart helices along the length thereof.
Claim 3
Dependent Claim
25 words
The cord of claim 1 wherein each yarn of said core contains from 0 to about 1 turn of twist per inch of yarn length.
Claim 4
Dependent Claim
13 words
The cord of claim 1 wherein each yarn of said core is tangled.
Claim 5
Dependent Claim
11 words
The cord of claim 1 wherein said synthetic polymer is nylon.
Claim 6
Dependent Claim
16 words
The cord of claim 4 wherein said continuous filaments each has a nominal denier of 6.
Claim 7
Dependent Claim
21 words
The cord of claim 4 wherein the total denier of the core is in the range of about 1680 to 7560.
Claim 8
Dependent Claim
20 words
The cord of claim 4 wherein said wrapper yarn forms from 1 to 8 helices per inch of core length.
Claim 9
Dependent Claim
13 words
The cord of claim 7 wherein said wrapper yarn is composed of nylon.
Claim 10
Dependent Claim
28 words
The cord of claim 8 wherein said core consists of a plurality of said drawn, oriented yarns laid side-by-side each having a denier ranging from 500 to 2500.
Claim 11
Dependent Claim
11 words
The cord of claim 9 wherein said nylon is nylon 66.
Claim 12
Dependent Claim
16 words
The cord of claim 10 wherein said wrapper yarn is a continuous filament nylon 66 yarn.
Claim 13
Dependent Claim
26 words
The cord of claim 11 wherein said wrapper yarn has a nominal denier ranging from 20 to 1260 and a nominal denier per filament of 6.
Claim 14
Dependent Claim
13 words
The cord of claim 4 wherein said core consists of a single yarn.
Claim 15
Dependent Claim
22 words
The cord of claim 13 wherein said single yarn contains less than about 1.0 turn of twist per inch of yarn length.
Claim 16
Dependent Claim
11 words
The cord of claim 13 wherein said singles yarn is tangled.
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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) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |