GB896448A - Pneumatic tire with crimped wire inserts, and method of embedding such inserts - Google Patents

Abstract

896,448. Tyre tread inserts. SCHUHKNECHT, E. March 24, 1960 [March 28, 1959], No. 10440/60. Class 144 (2). In a tyre tread comprising U-shaped steel wire inserts embedded therein, the inserts comprise non-linear, generally S-shaped bases such as 11a, Figs. 1, or 41a, Fig. 5, defining a plane extending at right-angles to, and on both sides of, that containing the arms 11c, 11b or 41b, 41c of the inserts. The inserts may be first embedded in a dove-tailed section ring 27 of rubber, Figs. 10 and 12, which is subsequently fitted in a groove 28a of corresponding section in the tyre tread. The inserts may be individual as in Fig. 1, or may be initially connected by loops 45 to form a row of inserts as in Fig. 5, the loops subsequently being worn away in use of the tyre. In an alternative row arrangement, Fig. 8, the inserts 21 with the S-shaped bases 21a may alternate with inserts 22 having linear bases 22a. The rings 27 may be cemented or vulcanized into the grooves 28a each with their wider dimension towards the tyre axis, and may be utilized in a tyre tread where some parts of the tread have the inserts directly embedded therein such as shown in Fig. 13.