Flexible annular core used for the production of hollow toroidal rubber shells
US3932088A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jul 31, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D2030/0655
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A flexible annular core for the production of hollow toroidal rubber shells, particularly pneumatic tires, composed of a pair of bead portions, each of which is composed of beads, a reinforcing layer folded back so as to enclose the beads, and elastomer layers covering the reinforcing layer, and a flexible shell portion composed of the reinforcing layer covered with the elastomer layers and extending across the bead portions. The bead portion of said flexible annular core is composed of the reinforcing layer and the elastomer layer adhered with each other. The flexible shell portion of said core is composed of the reinforcing layer and the elastomer layer not adhered with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.