Cold recapping method for tires utilizing uncured rubber and sectioned mold
US4767480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1984 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Sep 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S156/909
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for cold retreading or recapping of the running surface of a vehicle tire. A rubber, rope and cloth sectioned mold is produced utilizing a new tire male mold covered with perforated polypropylene film, uncured rubber with nylon rope at its edges and highly stretchable cloth enclosed in an envelope and cured by application of pressure and heat. A male mold is used to make the final female mold directly, or to make an intermediate mold which is used to produce a tread ring that is stretched to form a larger diameter male mold from which a final mold is prepared. The final mold is then sectioned to form one discontinuous section or two or more sections. Conveniently, one section from one size tire may be fitted with a section or sections from other size tires to form a mold to recap a third size tire. Additionally, radial inserts having the radial cross sections of the mold sections may be added to accommodate various tire sizes. The final mold thus produced is then utilized in recapping tires by fitting and fastening its sections and/or inserts around a prepared tire carcass coated with cement, a layer of uncured rubber, and a sheet of perforated polypropylene…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.