| 摘要 |
892,848. Pneumatic tyres. PNEUMATIQUES & CAOUTCHOUC MANUFACTURE KLEBER-COLOMBES. July 1, 1958 [July 2, 1957; Dec. 3, 1957], No. 21026/58. Class 144(2). A pneumatic tyre has a breaker assembly comprising at least one strip of parallel cord fabric 3 which has its side edges folded upon itself to provide a two-ply structure of full breaker width, and a layer 4 of rubber which is reinforced with natural or synthetic textile fibres, laminated with the two-ply structure. The fibre reinforced layer 4 may be enclosed within the folded strip 3, as shown in Fig. 1, the edges of the strip 3 abutting at 5 on the radially inner layer of the structure either at, or laterally displaced from the mid-circumferential line of the breaker. In alternative constructions the edges of the folded strip may overlap as at 9, Fig. 3, or the abutting edges may be covered by a narrow strip 10 of the fibre reinforced rubber, Fig. 4. Fig. 5 shows the fibre-reinforced layer 11 disposed radially inwardly of the folded strip ply 12 to cover the abutting edges thereof. Two such ply structures 12 may sandwich a fibre reinforced rubber layer 11, or two assemblies 3, 4 such as shown in Fig. 1 may be superimposed to form the breaker. Alternatively two parallel cord fabric strips may be superimposed before folding and then folded around one or more layers of fibrereinforced rubber. In all cases the cords of the fabric strips may extend at a cord angle of 0 to 40 degrees with the circumferential and where two strips are used they may be disposed with their cords in symmetrically-crossed relation. The cords may comprise twisted filaments of metal, or natural or synthetic textile material. The fibres reinforcing the rubber layer may be oriented in a direction generally transversely of the breaker at an angle of 75 to 90 degrees to the circumferential, or may be randomly disposed. |
