Method for constructing a bead reinforcement with alternate windings of polymeric material and axially spaced apart windings of a wire
US5100490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/627
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The reinforcement for the bead of e.g. a pneumatic type, a rolling lobe diaphragm or an air spring is constructed by winding onto a mandrel or former superimposed layers alternately of unsheathed wire and flat, uncured rubber strip. Rubber is wound on before wire winding commences and continues after wire winding stops, so that the assembly exposes no cut wire end. After the winding operation the assembly is subjected to heat and pressure with all the wire embedded in and surrounded by an integrated, vulcanized rubber body. The rubber layers may be parallel with and on opposite sides of the layers of spaced wire windings or a given rubber winding may have wire windings on its radially opposite sides. The windings, both of rubber and wire, may be discrete loops or may be made by helically winding a single rubber strip or wire. The shape of the assembly as well as the volume of rubber at any position therein may be controlled by varying the tension under which the rubber strip and/or the wire is wound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.