Forming drum for building a tire
AssigneeBridgestone Corporation
InventorChiaki Ozawa
Life of this patent
Estimating the term…
Abstract
A forming drum to be used in tire building for forming a strip-like belt member having a steel cord buried therein into an annular shape. The forming drum includes a plurality of segments divided in the circumferential direction and made of non-magnetic material, which form substantially cylindrical shapes having different outer diameters as moved in the radial direction, and permanent magnet are buried in the circular arc-shaped surfaces of the segments. Between adjacent segments are mounted cover plates made of non-magnetic material, and a cylindrical outer circumferential surface is formed by these cover plates. Each cover plate is fixedly secured to the circular arc-shaped surface of one of the adjacent segments.
Claims7
A forming drum for building a tire to form a strip-like belt member comprising a rubber-coated steel cord into an annular belt, said drum comprising;
- a plurality of segments divided in the circumferential direction and adapted to form substantially cylindrical shapes having different outer diameters as moved in the radial direction;
- said plurality of segments formed of non-magnetic material, permanent magnets buried in arc-shaped outer surfaces of said segments;
- cover plates made of non-magnetic material respectively mounted between adjacent ones of the segments to form a cylindrical outer circumferential surface, and each of said cover plates fixedly secured to the arc-shaped outer surface of the corresponding one of the segments to form a continuous covering over said permanent magnets buried in said segments irrespective of any radial movement of said segments.
Dependencies are inferred from the claim text.