| 摘要 |
905,471. Pneumatic tyres. PIRELLI S.p.A. June 14, 1960 [Oct. 15, 1959], No. 20857/60. Class 144 (2). A pneumatic tyre includes a circumferentially extending inextensible cincture 5 composed of at least one pair of superimposed layers of metal cords extending in a continuous zig-zag course of uniform pitch circumferentially of the tyre, each diagonal cord portion of the cincture extending from one edge to the other of the cincture, and a further reinforcement 6 disposed radially outwardly with respect to the cincture 5 such that the tread of the tyre is shielded by such reinforcement 6 from any transverse vibrations normally imparted thereto by the cincture 5 when the tyre is rotating under load. In the arrangement shown in Fig. 2, the further reinforcement comprises two layers 6<SP>1</SP>, 6<SP>11</SP> of textile cords in which the cords of each layer are parallel to one another and are inclined at an angle of 15-45 degrees with respect to the mid-circumferential plane of the tyre, the cords in one layer being of opposite inclination to those of the other layer. In the modification, Fig. 3 (not shown), the further reinforcement 6 consists of a single layer of cords following a sinuous course. The further reinforcement may be constituted by textile cords of natural, artificial or synthetic textile material disposed in one or more layers. Specifications 780,765, 787,705, 815,053 and 905,469 are referred to. |
