Sedepro

Michelin Recherche Et Technique S.a.

Compagnie Générale Des Etablissements Michelin-Michelin & Cie

Compagnie Generale Des Establissements Michelin - Michelin & Cie

Michelin & Cie

Ispat-unimetal

Compagnie Generale Des Etab. Michelin Michelin & Cie

Jean-Claude Arnaud

Pedro Costa Pereira

Eric Depraetere

Raoul Serre

Marc Francois

Christian Lamoureux

Bernard P Prudence

Patrick Corsi

The anchoring of the carcass reinforcing elements is assured by circumferential cables , with the interposition of a connecting rubber composition . The circumferential cable is arranged in several turns forming one or more helices. These circumferential cables have an operational elongation rate A &equals;A &plus;A of more than 4%. This operational elongation rate does not include the specific elongation A of the &ldquo;cable&rdquo; effect. The maximum stress R of the cable is preferably more than 2000 MPa. The cables have undergone a heat treatment which has, in combination, the features of being a recovery annealing treatment and which is carried out directly on cable comprising wires previously separately covered by an adherent coating.

Cable for anchoring a tire carcass

The anchoring of the carcass reinforcing elements is assured by circumferential cables with the interposition of a connecting rubber composition The circumferential cable is arranged in several turns forming one or more helices. These circumferential cables have an operational elongation rate A &equals;A &plus;A of more than 4%. This operational elongation rate does not include the specific elongation A of the &ldquo;cable&rdquo; effect. The maximum stress R of the cable is preferably more than 2000 MPa. The cables have undergone a heat treatment which has, in combination, the features of being a recovery annealing treatment and which is carried out directly on cable comprising wires previously separately covered by an adherent coating.

Tire having circumferential cables for anchoring the carcass and process of preparing such cables

The present invention provides a stainless steel wire for a carcass of a tire and a process for making such a wire. The wire comprises at least 0.02% and at most 0.2% carbon, at least 3% and at most 20% nickel, at least 12% and at most 28% chromium, the sum of the nickel and chromium being at least equal to 20% and at most 35% (% in weight). The structure of the steel comprises at least 20% in volume of martensite and it is devoid of austenite or it comprises less than 80% of it in volume.

Tire having a stainless steel carcass reinforcement

Wire stock suitable for reinforcement

Ready-to-use metal wire and method for producing same

The anchoring of the carcass reinforcing elements 1 is assured by circumferential cables 2, with the interposition of a connecting rubber composition 3. The circumferential cable 2 is arranged in several turns forming one or more helices. These circumferential cables have an operational elongation rate A.sub.f =A.sub.e +A.sub.p of more than 4%. This operational elongation rate does not include the specific elongation A.sub.s of the 'cable' effect. The maximum stress R.sub.m of the cable 2 is preferably more than 2000 MPa. The cables have undergone a heat treatment which has, in combination, the features of being a recovery annealing treatment and which is carried out directly on cable comprising wires previously separately covered by an adherent coating.

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Durtol, France

Jean-Claude Arnaud