| 摘要 |
1,033,547. Hose pipes. GEORGE ANGUS & CO. Ltd. May 10, 1965 [May 20, 1964], No. 20822/64. Heading F2P. A hose pipe includes an even number of helically wound strips, each strip consisting of two layers of thermoplastic polymeric material on either side of parallel reinforcing filaments which extend in the longitudinal direction only of the strips half of which are wound lefthanded and half right-handed and are bonded together. The strips may be wound on to an inner tube of plastic material and have an outer cover of the same. The hose may have a reinforcing helix of steel wire on to which the strips are wound or which is embedded in the hose. The strips are fabricated by feeding rubber into the nip of a pair of calender rollers to extrude a strip on to which filaments of wire or textile are fed and pressed on to by other rollers and finally extruding another rubber strip and pressing it on to the filaments to form a sandwich with the first strip (Figs. 1 and 2 not shown). Only part of a width of strip may be reinforced with longitudinal filaments and the resulting strip wound overlapping as in Fig. 9B where is shown an inner tube on to which strip is wound without overlapping to form a tube 38 followed by further strip 31 wound overlapping. |
