Method for curing of pneumatic tires
Abstract
Abstract PNEUMATIC TIRES UTILIZING NYLON CORDS TO REINFORCE THE TIRE CARCASS ARE PLACED IN A CONVENTIONAL TIRE CURING MOLD AND ARE CURED AT ELEVATED TEMPERATURES AND PRESSURES FOLLOWED BY COOLING IN THE MOLD WITH WATER AT AMBIENT TEMPERATURE WHILE MAINTAINED AT SUBSTANTIALLY THE SAME PRESSURE. BY PARTIALLY COOLING THE TIRE IN THE MOLD, THE TENSIL STRENGTH OF THE NYLON CORDS IS PRESERVED AND THE TREAD LIFE IS PROLONGED. DURING COOLING THE WATER IS ADDED CONCOMITANTLY WITH THE STEAM AND T A FIXED VOLUME RATIO THEREWITH, TO MAINTAIN SUFFICIENT PRESSURE WITHIN THE MOLD THEREBY PREVENTING RETRACTION OF THE TIRE FROM THE MOLD. THE PROCESS WHICH PROVIDES MORE UNIFORM COOLING IS ALSO APPLICABLE TO TIRES CONTAINING CORDS MADE FROM TEXTILES OTHER THAN NYLON.
Inventors
- 👤 David L Miller
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |