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US 2002/0153078 A1Published application
Multi-Layer steel cable for tire carcass
OwnerFrancois-Jacques Cordonnier, Alain Domingoinventors
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OwnerFrancois-Jacques Cordonnier, Alain Domingoinventors
Estimating the term…
A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core (C0) 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 being characterised in that it has the following characteristics (d0, d1, d2, p1 and p2 in mm): (i) 0.14<d0<0.28; (ii) 0.12<d1<0.25; (iii) 0.12<d2<0.25; (iv) for M=6: 1.10<(d0/d1)<1.40; for M=7: 1.40<(d0/d1)<1.70; (v) 5π(d0+d1)<p1<p2<5π(d0+2d1+d2); (vi) the wires of layers C1 and C2 are wound in the same twist direction. The invention furthermore relates to the articles or semi-finished products made of plastics material and/or rubber which are reinforced by such a multi-layer cable, in particular to tires intended for industrial vehicles, more particularly truck tires and their carcass reinforcement plies.
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):
A truck tire having a carcass reinforcement comprising a multi-layer cable having a unsaturated outer layer, 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, said multi-layer cable having the following characteristics (d0, d1, d2, p1 and p2 in mm):
A composite fabric usable as a carcass reinforcement ply for a truck tire, comprising a matrix of rubber composition reinforced by a multi-layer cable having a unsaturated outer layer, 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 pi, 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, said multi-layer cable having the following characteristics (d0, d1, d2, p1 and p2 in mm):
Dependencies are inferred from the claim text.