| 摘要 |
1,067,991. Pneumatic tyres. PNEUMATIQUES, CAOUTCHOUC MANUFACTURE ET PLASTIQUES KLEBER COLOMBES. Oct. 31, 1963 [Oct. 31, 1962], No. 43043/63. Heading B7C. A pneumatic tyre for a vehicle operating at high speeds comprises a carcass 10 constituted by one or more layers of parallel cords, cables, tapes or the like arranged in radial planes of the tyre, a tread 13 reinforced by means of one or more fabric layers embedded therein, and a circumferentially inextensible breaker 12 located between the tread and the carcass. This breaker 12 has a circumferential length such that it prevents radial expansion of the carcass. The elasticity of the tread may be varied in a radial direction by varying! the spacing between the reinforcing layers or by varying the angles made with the midcircumferential plane by parallel cords constituting these layers. In one embodiment, Fig. 5 (not shown), the radially outermost reinforcing layer (19) extends into circumferential ribs provided on the tread surface. In other embodiments the reinforcing layers extend radially inwards around the edges of the breaker 12 towards the carcass or continue through the tyre sidewalls to the bead regions. Alternatively, the reinforcing layers may be formed by folding back the edges of two or more of the layers constituting the breaker 12. The reinforcing layers are formed with nylon, rayon, polyester or glass fibres or steel, aluminium or other metallic cords. |
