Anchoring of a tire carcass

Abstract

Tire containing a crown, two sidewalls and two beads, a carcass reinforcement with first reinforcing cords placed adjacent, aligned circumferentially in at least one circumferential alignment from at least one of said beads to one of said sidewalls and anchored in said one bead, and a crown reinforcement, said one bead containing an anchoring zone enabling the carcass reinforcement to be maintained and including at least one circumferentially oriented second reinforcing cord cooperating with an adjacent portion of the carcass reinforcement by means of a rubber anchoring compound in contact with the second reinforcing cord and the adjacent sections of the first reinforcing cords, wherein the rubber anchoring compound has a modulus of elasticity at a 10% deformation ranging between 10 and 20 MPa and wherein the rubber anchoring compound comprises at least one synthetic elastomer in the SBR group and of polybutadienes with a total proportion of synthetic elastomer exceeding 50% of the total weight of elastomers.

1 - 4 . (canceled)  
   
   
       5 . A tire containing a crown, two sidewalls and two beads, a carcass reinforcement with first cords placed adjacent, aligned circumferentially in at least one circumferential alignment from at least one of said beads to one of said sidewalls and anchored in said one bead, and a crown reinforcement, said one bead containing an anchoring zone enabling the carcass reinforcement to be maintained and including at least one circumferentially oriented second cord cooperating with an adjacent portion of the carcass reinforcement by means of a rubber anchoring compound in contact with the second cord and the adjacent sections of the first cords, wherein the rubber anchoring compound has a modulus of elasticity at a 10% deformation ranging between 10 and 20 MPa and wherein the rubber anchoring compound supports, without breaking, a static creep stress of 150° C. under a strain of 2.35 of MPa for at least 5 hours.  
   
   
       6 . The tire according to  claim 5 , in which the rubber anchoring compound has a static creep rate at 150° C. under a strain of 2.35 MPa less than 2.10 −3 /min between 3 and 5 hours of stress.  
   
   
       7 . A tire containing a crown, two sidewalls and two beads, a carcass reinforcement with first cords placed adjacent, aligned circumferentially in at least one circumferential alignment from at least one of said beads to one of said sidewalls and anchored in said one bead, and a crown reinforcement, said one bead containing an anchoring zone enabling the carcass reinforcement to be maintained and including at least one circumferentially oriented second cord cooperating with an adjacent portion of the carcass reinforcement by means of a rubber anchoring compound in contact with the second cord and the adjacent sections of the first cords, wherein the rubber anchoring compound has a modulus of elasticity at a 10% deformation ranging between 10 and 20 MPa and wherein the rubber anchoring compound has a reversion rate after 10 min. at 197° C. of less than 10%.  
   
   
       8 . The tire according to  claim 7 , in which the rubber anchoring compound has a reversion rate after 10 min. at 197° C. of less than 5%.  
   
   
       9 . The tire according to  claim 7 , in which the first cords form adjacent forward and return paths with loops in the beads connecting a forward to a return path every time.  
   
   
       10 . The tire according to  claim 5 , in which the first cords form adjacent forward and return paths with loops in the beads connecting a forward to a return path every time.