US3863683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire cord for pneumatic tires and pneumatic tires containing the same
Assignee: Compagnie Industrielle de Textiles Artificiels et Syntheliques SA
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Filing: 1970-09-10
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Granted: 1975-02-04
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Expires: 1990-09-10
Abstract
Abstract A process for producing cords for pneumatic tires, such cords so produced and pneumatic tires containing same, such process comprising preparing a woven sheet of equidistant cords by weaving such cords as the warp with a composite weft thread composed of a core yarn of low mechanical strength, said cord yarn having a helically wound cover yarn of a length such that during warping, dipping, or drawing of the sheet of cords the cover yarn stretches whereby the increased length of the cover yarn is equal to that which is necessary to maintain the warp cords in a parallel equidistant relationship. The core yarn is of such sufficiently low mechanical strength that it will break during the manipulative steps of tire production.
Inventors
- 👤 Raymond Guyot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:04
CPC Classifications
D; D03; D03D; D03D11/00; B; B60; B60C; B60C9/00; B60C9/0042; D02; D02G; D02G3/00; D02G3/22; D02G3/32; D02G3/36; D03D15/00; D03D15/20; D03D15/208; D03D15/217; D03D15/242; D03D15/267; D03D15/283; D03D15/40; D03D15/41; D03D15/47; D03D15/50; D03D15/56; D03D15/573; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06; D10B2201/00; D10B2201/01; D10B2201/02; D10B2201/20; D10B2201/22; D10B2201/24; D10B2321/00; D10B2321/04; D10B2321/041; D10B2331/00; D10B2331/02; D10B2331/04; D10B2401/00; D10B2401/06; D10B2401/061; D10B2505/00; D10B2505/02; D10B2505/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A method of preparing a woven fabric of parallel, equidistant cords for use in pneumatic tires comprising the steps of weaving said cords as warp yarn with a composite weft yarn including a core yarn of low mechanical strength and a cover yarn helically wound around said core yarn, said cords being positioned in first and second planes after weaving with said composite weft yarn, and said core yarn having a length to maintain said cords in said first and second plane positions in parallel, equidistant relationship; and processing said woven cords to position said cords in a single plane, said core yarn being broken during said processing step due to tensile stress caused by increased length requirement to maintain said cords in said parallel, equidistant relationship exceeding said low mechanical strength of said core yarn and said cover yarn being straightened during said processing step and said cover yarn having a predetermined straightened length exactly equal to the length required to maintain said cords in said single plane in parallel, equidistant relationship.
Claim 2
Independent Claim
173 words
A method of preparing a woven fabric of parallel, equidistant cords for use in pneumatic tires comprising the steps of weaving said cords as warp yarn with a composite weft yarn including a core yarn of low mechanical strength and a cover yarn helically wound around said core yarn, said cords being positioned in first and second planes after weaving with said composite weft yarn, and said core yarn having a length to maintain said cords in said first and second plane positions in parallel, equidistant relationship; and processing said woven cords to position said cords in a single plane, said core yarn being broken during said processing step due to tensile stress caused by increased length requirement to maintain said cords in said parallel, equidistant relationship exceeding said low mechanical strength of said core yarn and said cover yarn being straightened during said processing step and said cover yarn having a predetermined straightened length exactly equal to the length required to maintain said cords in said single plane in parallel, equidistant relationship.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein said weaving step includes composing said core yarn of elastic material compatible with vulcanizing material employed in the production of a pneumatic tire.
Claim 4
Dependent Claim
151 words
A woven fabric of parallel, equidistant cords for pneumatic tires comprising a plurality of said cords arranged in parallel, equidistant relation as warp yarn, each (alternate ones) of said cords being disposed in (a) first and second spaced planes alternately lengthwise and weftwise (plane and the remaining ones of said cords being disposed in a second plane spaced from said first plane), and a weft yarn running transversely through said cords over and under (said alternate) consecutive ones of said cords (and under said remaining ones of said cords), said weft yarn including a core yarn having a length to maintain said cords in parallel, equidistant relation in said first and second planes and a cover yarn helically wound around said core yarn and having a straightened length exactly equal to the length required to maintain said cords in parallel, equidistant relation when said cords are forced into a single plane.
Claim 5
Dependent Claim
151 words
A woven fabric of parallel, equidistant cords for pneumatic tires comprising a plurality of said cords arranged in parallel, equidistant relation as warp yarn, each (alternate ones) of said cords being disposed in (a) first and second spaced planes alternately lengthwise and weftwise (plane and the remaining ones of said cords being disposed in a second plane spaced from said first plane), and a weft yarn running transversely through said cords over and under (said alternate) consecutive ones of said cords (and under said remaining ones of said cords), said weft yarn including a core yarn having a length to maintain said cords in parallel, equidistant relation in said first and second planes and a cover yarn helically wound around said core yarn and having a straightened length exactly equal to the length required to maintain said cords in parallel, equidistant relation when said cords are forced into a single plane.
Claim 6
Dependent Claim
34 words
The woven fabric of cords of claim 3 wherein said core yarn is of a sufficiently low mechanical strength so that said core yarn breaks when said cords are forced into said single plane.
Claim 7
Dependent Claim
29 words
The woven sheet of cords of claim 3 wherein said core yarn is composed of elastic material compatible with vulcanizing material employed in the production of a pneumatic tire.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |