Patent ID: 6461460
Filing Date: 2002-10-08
Classification: B29D,B60C

Abstract:
A process for the manufacture of a tire with radial carcass reinforcement extending from one bead to the other and with edges folded over to form carcass reinforcement upturns, each bead being without a bead wire and reinforced by a complex C of axially adjacent layers of reinforcement elements which form an angle &bgr; with the circumferential direction such that 0Â°a) laying at least one ply of reinforcement elements oriented at an angle &agr;, such that &agr;&gE;10Â°, on a laying drum of radius R, b) extending said ply by increasing the drum radius to a value R1 greater than R, c) forming a cylindrical sleeve of two layers of elements crossed from one layer to the next, with an angle &agr;&gE;10Â°, d) increasing for a second time the radius of the laying drum to a radius R2 such that the final angle &bgr; of the reinforcement elements is obtained by pantograph effect, e) finishing the building of the complex of adjacent layers, f) removing the finished complex from its laying drum and laying it at the desired location on the building drum for the cylindrical carcass reinforcement blank.