Patent ID: 8246890

Claim:
Method of producing a multilayer article forming an axisymmetric body, said article comprising at least a base of diameter D joined to a side wall of average thickness T and of height H, said method consisting of feeding a coextruded multilayer charge into a cavity of a mould, then in compressing said charge in order to form the article, the charge forming a body axisymmetric about an axis of symmetry, the charge consisting of a radial stack of several layers of which at least one is a functional layer, the outer diameter of said charge being approximately equal to D and having a cylindrical geometry and a top surface and an opposite bottom surface connected to one another along the circumference of the charge, the direction of compression being parallel to the axis of symmetry of said charge, and the compression being carried out on the to surface of the charge, wherein the charge is compressed only on one central portion of the top surface, the central portion being smaller than the entire top surface, and wherein the diameter of the central portion of the charge is approximately equal to D−2T.