Cable bead and method of manufacture
AssigneeThe Goodyear Tire & Rubber Company
InventorsRichard Nicholas Hrycyk, Donald Chester Kubinski, Warren Paul Ripple
Life of this patent
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Abstract
The present invention relates to a cable bead, the method of constructing the cable bead and a tire constructed by a process incorporating the cable bead wherein the cable bead is formed with a bead core wound from a single filament of bead core wire having a rubber or elastomeric coating, first annular wrap of bead wrapping wire helically wound around the bead core, and a coating of lubricant or fatty acid disposed about the bead core.
Claims19
An uncured cable bead, comprising:
- a bead core formed from a single filament of bead core wire having a coating of rubber or elastomeric material, the bead core wire being continuously wound into successive windings in a side by side relation and in successive superimposed rows of predetermined widths to form a bead core of predetermined cross-sectional shape;
- a coating of lubricant surrounding the bead core;
- and
- a first annular wrap of a single filament of bead wrapping wire helically wound around the coating surrounding the bead core.
A method of constructing a cable bead by the steps of:
- winding a single filament of bead core wire having a coating of rubber or elastomeric material into successive windings in a side by side relation and in successive superimposed rows of predetermined widths to form a bead core of predetermined cross-sectional shape;
- coating the bead core with a lubricant;
- and
- helically winding a first annular wrap of a single filament of bead wrapping wire in a first direction around the coating surrounding the bead core.
A vulcanized tire constructed by the process of:
- constructing a cable bead by winding a single filament of bead core wire having a coating of rubber or elastomeric material into successive windings in a side by side relation and in successive superimposed rows of predetermined widths to form a bead core of predetermined cross-sectional shape;
- coating the bead core with a lubricant;
- and helically winding a first annular wrap of a single filament of bead wrapping wire in a first direction around the coating surrounding the bead core;
- setting the cable bead onto a tire ply disposed a building drum with free ends extending outward from the beads;
- expanding the building drum so that the cable bead locks the ply in place and turning up the free ends of the ply around the bead so that the coating between the bead core and the annular wrap of bead wrapping wire allows the annular wrap and the ply to slip or rotate with respect to the bead core of the cable bead and return to a desired location once the turnup is completed;
- blowing up the carcass into a toroidal shape with the coating about the bead core operating as a lubricant to allow for some movement between the bead core and the annular wrap;
- and
- curing the tire in a tire mold so that the lubricant dissolves into the coating of rubber or elastomeric material about the bead core.
Dependencies are inferred from the claim text.