Patent ID: 8192663

Claim:
A method for manufacturing a tyre, comprising: making at least one semi-finished elementary product of elastomeric material; and depositing the at least one elementary product; wherein the at least one elementary product is deposited by overlaying the at least one elementary product in adjacent turns on a toroidal support; wherein making the at least one elementary product comprises extruding the elastomeric material through an extruder head, wherein the extruder head comprises a bushing, wherein the bushing defines a tapered extrusion channel, wherein the bushing comprises: an inlet section; and an outlet section; wherein a ratio of an area of the inlet section to an area of the outlet section is greater than 5:1 and less than 100:1, wherein a ratio of a diameter of the inlet section to a length of the bushing is greater than 0.1:1 and less than 1:1, and wherein the bushing comprises at least two parts that can be assembled on a diametrical plane.