GB111712A - Improvements in the Manufacture of Rings or Endless Bands of Fibrous Materials. - Google Patents

Abstract

111,712. Frood, H. Dec. 7, 1916 Energy-absorbing elements.-Rings or endless bands for road-vehicle wheel tyres, linings for brake drums, friction cones and like friction surfaces, driving-bands for projectiles, &c. are made from yarns, threads, cords, &c. c, c<1>, c<2> of fibrous material, such as cotton, flax, rhea, jute, hemp, wool, hair, asbestos, or mixtures thereof, the yarns being wound in a number of layers on a rotary mandrel or drum a. The winding is in the form of coarse spirals, the yarn passing from side to side not more than once during a revolution, and this is effected by traversing the yarns by split drums d<1> as in " cheese " winding, or by reciprocating the drum axially, or by other means. The yarns may be coated with rubber by passage through a trough e containing rubber solution; or they may be coated or impregnated before or after winding. The rings or bands may then be consolidated by pressure and have rubber coverings applied to them, and be moulded to shape and vulcanized on the drum or after removal therefrom, the moulds coacting with the drum being made in sections. In some cases, the coating or impregnating material may be the enamel described in Specification 4627/09, or other material such as non-vitreous varnish, japan, lacquer, &c., for fireproofing &c. ; or metallic oxides may be used. Stoving or baking may be effected on the drum. The yarns may be wound under tension, and wire may be incorporated with them.