| 摘要 |
1,265,462. Pneumatic tyres. GOODYEAR TIRE & RUBBER CO. 5 Jan., 1970 [7 Feb., 1969], No. 421/70. Heading B7C. A pneumatic tyre 10 comprises a bias cut parallel cord carcass 12, beads 16, a tread 13, a belt 18 of bias cut parallel cord plies 20, 22 and, located: between the belt and the tread, a. quantity of randomly oriented filaments embedded in a low hysteresis rubber 24 and superposed at least over the edges 26, 28 of the belt. The tyre cord fabric is preferably polyester but may be nylon, rayon, fibreglass or metal and the cords make angles of preferably 30 to 40 degrees but up to 55 degrees to the mid-circumferential plane, while the belt cords are preferably continuous filament fibreglass but may be polyester, rayon or metal and make an angle from 22 to 30 degrees to the plane. The filaments are randomly distributed throughout a layer of low hysteresis rubber and are preferably brass plated steel wire, diameter 0À006 inch and length from # to # inch, while filaments of nylon, rayon, polyester, textile materials or fibreglass can be used. The rubber layer embedded with filaments is from 0À60 to 0À15 inch thick and contains from 1 to 40% filaments by weight, preferably 12% wire. The undertread (i.e. that part of the tread disposed radially inwards from the profiled tread) may be wholly or partly of the filamentary reinforced low hysteresis rubber. |
