Patent ID: 6748989
Filing Date: 2004-06-15
Classification: B60C,D07B,Y10S,Y10T

Abstract:
A multi-layer cable having a unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core of diameter d0 surrounded by an intermediate layer (C1) of six or seven wires (M=6 or 7) of diameter d1 wound together in a helix at a pitch p1, this layer C1 itself being surrounded by an outer layer (C2) of N wires of diameter d2 wound together in a helix at a pitch p2, N being less by 1 to 3 than the maximum number Nmax of wires which can be wound in one layer about the layer C1, this cable having the following characteristics (d0, d1, d2, p1 and p2 in mm):(i) 0.140<0.28; (ii) 0.121<0.25; (iii) 0.122<0.25; (iv) for M=6: 1.100/d1)<1.40; for M=7: 1.400/d1)<1.70; (v) 5&pgr;(d0+d1)12<5&pgr;(d0+2d1+d2); (vi) the wires of layers C1 and C2 are wound in the same twist direction.