Method of manufacturing radial tire
US4824501A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Jun 5, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D30/70
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
To obtain a uniform initial cord tension in an auxiliary layer of a radial tire made up of a toroidal carcass, a belt, the auxiliary layer and a tread rubber, the belt is formed by winding inextensible cords around a drum with a radius of curvature substantially the same as that of a tire tread. Further, when the belt is formed by winding the cords around a flat drum, the auxiliary layer is formed on the belt by winding a heat-shrinkable cord around the belt in spiral fashion in such a way as to apply a higher tension at both the ends of the belt layer than at the center thereof. The radial tire thus manufacture is excellent in high-speed tire durability and tire uniformity, without causing belt separation trouble at high speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.