| 摘要 |
1,087,903. Endless conveyers. OWENS CORNING FIBERGLAS CORPORATION. Dec. 24, 1963 [Dec. 26, 1962], No. 50910/63. Heading B8A. [Also in Divisions B5 and F2] In a conveyer or driving belt of elastomeric material, e.g. neoprene, chloroprene, isoprene, butadiene homopolymers, butadiene co-polymers with styrene or acrylonitride, natural rubber, or a mixture of some of these, reinforcing glass fibre cords 40 extend transversely of the belt. In a V-belt, the cords may be uniformly distributed as shown, with those in the outer layers 44 extending longitudinally of the belt, or they may be confined to a zone between the parts of the side faces contacting a sheave (Fig. 6, not shown). The termination of the cords at the belt side faces is stated to improve cooling of the interior. In manufacture, strips of uncured elastomeric material containing longitudinal reinforcing cords are arranged in layers on a cylindrical mandrel so that the cords extend parallel to its longitudinal axis, together with unreinforced layers if required. The resulting composite layer is then slit circumferentially and the resulting belts, incorporating transverse cords, are removed from the mandrel and cured. The requisite uncured strips may be formed by applying a layer (12) of elastomeric material to a mandrel (14) (Figs. 3, 4, not shown) and, while the mandrel rotates at least once, and preferably twice, feeding spaced parallel glass fibre cords (20) from spindles (22) through a guide comb (24) on to the surface of the layer (12), about which they are wound circumferentially, i.e. not helically. The reinforced layer is then cut circumferentially and axially to provide the strips. Alternatively parallel fibres may be fed into the nip of sheeting rollers (66, 68) (Fig. 7, not shown) or milling rollers (74, 76) (Fig. 8, not shown) to be embedded in a mass of uncured elastomeric material, so that they are uniformly embedded in the sheet material produced, which is then cut into strips. The surface of the glass fibres may be treated to improve adhesion of the elastomeric material, e.g. as described in Specification 1,087,902 (see Division D1). |
