US4218277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire retreading method including adding reinforcing belt
Assignee: Individual
•
Filing: 1978-10-23
•
Granted: 1980-08-19
•
Expires: 1998-10-23
Abstract
Abstract A pneumatic tire having a radial carcass and at least two plies of steel cord belts as constituents of the reusable tire body has recap components that include an unvulcanized reinforcement belt having rubberized textile cord elements oriented parallel with respect to the equatorial plane of the tire. The textile cord reinforcement belt is wound around the tire under tension and an unvulcanized tread strip is applied thereover. Subsequent vulcanization assures a firm bond between the recap components and the used tire body.
Inventors
- 👤 Sjirk van der Burg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:45
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/54; B60; B60C; B60C9/00; B60C9/18; B60C9/20; B60C9/2003; B60C9/2009
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
A method of recapping a pneumatic tire having a radial carcass and a first circumferential reinforcement belt formed with steel cords at angles between 10 and 30 degrees comprising, stripping the unusable tread from the tire to form a circumferential recapping surface at a predetermined depth that maintains the first reinforcement belt intact, winding an unvulcanized second reinforcement belt of heat shrinkable rubberized textile cord material in spiral arrangement around said recapping surface for at least one full winding under a predetermined tension to stretch the textile cord material by 1 to 5 percent from its rest state and to provide overlapping end portions that overlap a predetermined amount with the textile cord elements being oriented parallel to the equatorial plane of the tire, subdividing a predetermined portion of said second reinforcement belt into spaced marginal strips arranged to overlap the marginal edges of said first reinforcement belt, applying an unvulcanized tread strip around said recapping surface over the second reinforcement belt and vulcanizing the recapped tire components on the recapping surface to provide a firm bond between the recapping surface and the tread strip, between the recapping surface and the second reinforcement belt and between the tread strip and the second reinforcement belt.
Claim 2
Independent Claim
204 words
A method of recapping a pneumatic tire having a radial carcass and a first circumferential reinforcement belt formed with steel cords at angles between 10 and 30 degrees comprising, stripping the unusable tread from the tire to form a circumferential recapping surface at a predetermined depth that maintains the first reinforcement belt intact, winding an unvulcanized second reinforcement belt of heat shrinkable rubberized textile cord material in spiral arrangement around said recapping surface for at least one full winding under a predetermined tension to stretch the textile cord material by 1 to 5 percent from its rest state and to provide overlapping end portions that overlap a predetermined amount with the textile cord elements being oriented parallel to the equatorial plane of the tire, subdividing a predetermined portion of said second reinforcement belt into spaced marginal strips arranged to overlap the marginal edges of said first reinforcement belt, applying an unvulcanized tread strip around said recapping surface over the second reinforcement belt and vulcanizing the recapped tire components on the recapping surface to provide a firm bond between the recapping surface and the tread strip, between the recapping surface and the second reinforcement belt and between the tread strip and the second reinforcement belt.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the entirety of said second reinforcement belt is subdivided into said spaced marginal strips.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the second reinforcement is wound symmetrical with respect to the equatorial axis of the tire.
References Cited (Backward Citations)
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US4040464A
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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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |