Patent ID: 6837289

Claim:
A multi-layer cable having a unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core (C 0 ) of diameter d 0 surrounded by an intermediate layer (C 1 ) of four or five wires (M=4 or 5) of diameter d 1 wound together in a helix at a pitch p 1 , this layer C 1 itself being surrounded by an outer layer (C 2 ) of N wires of diameter d 2 wound together in a helix at a pitch p 2 , N being less by 1 to 3 than the maximum number N max of wires which can be wound in one layer about the layer C 1 , this cable having the following characteristics (d 0 , d 1 , d 2 , p 1 and p 2 in mm): 0.08 <d 0 <0.28; (i) 0.15 <d 1 <0.28; (ii) 0.12 <d 2 <0.25; (iii) for M= 4:0.40<( d 0 /d 1 )<0.80; (iv) for M= 5:0.70<( d 0 /d 1 )<1.10; 4.8π( d 0 +d 1 )< p 1 <p 2 <5.6π( d 0 +2 d 1 +d 2 ); (v) the wires of layers C 1 and C 2 are wound in the same direction of twist. (vi)