Building a closed torus tire
US3989564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1975 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Aug 4, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D2030/1678
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for use in building a closed torus tire. An expandable sleeve having an inflatable portion expands to wrap a sheet of tire building material partially about a disintegratable generally toroidal core. A bladder beneath the sleeve is then inflated to roll the sleeve toward the core causing the edges of the sheet to flip or snap from the sleeve surface to the core surface. The apparatus includes a drum expandable to either of two fully supported and different building diameters enabling stable support first of the core with at least one sheet of material engaged with the internal circumference of the core, and then the core with added thickness of tire components engaged with the internal diameter of the core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.