Multi-strand cord in which the basic strands are dual layer cords, rubberized in situ

A multistrand metal cord of K×(L+M) construction, which can notably be used for reinforcing tire belts for industrial vehicles, consisting of K elementary strands assembled in a helix, with a helix pitch PK, each elementary strand:

• comprising a cord having two layers of L+M construction, rubberized in situ, comprising an inner layer comprised of L wires of diameter d1, L varying from 1 to 4, and an outer layer of M wires, M being equal to or greater than 5, of diameter d2, which are assembled in a helix with a pitch p2 around the inner layer;
• and
• having the following characteristics (d1, d2 and p2 being expressed in mm):
• 0.10<d1<0.50;
• 0.10<d2<0.50;
• 3<p2<10;
• wherein said inner layer of the elementary strand is sheathed with a rubber composition called a “filling rubber”;
• over any length of the elementary strand equal to K times PK, the filling rubber is present in each of the capillaries delimited by the L wires of the inner layer and the M wires of the outer layer, and also, when L is equal to 3 or 4, in the central channel delimited by the L wires of the inner layer;
• and
• the amount of filling rubber in said elementary strand is between 5 and 40 mg per g of elementary strand.