Patent ID: 8603275

Claim:
A process of manufacturing pneumatic tyres comprising: applying at least one carcass ply around at least one radially external surface of a forming drum, said at least one carcass ply having axially opposite end flaps; coaxially engaging an annular anchoring structure around each of the end flaps; turning up each of the opposite end flaps of said at least one carcass ply around a respective annular anchoring structure, so as to enclose each annular anchoring structure in a respective loop, in order to make a carcass sleeve; in a radial section of the carcass sleeve, each of said loops extending over a predetermined length and comprising a portion having an extension less than or equal to about 30% of said predetermined length; positioning an outer sleeve comprising at least one belt structure to a coaxially centered position around said carcass sleeve; and shaping said carcass sleeve into a toroidal configuration through radial expansion of said at least one carcass ply so as to cause application of said carcass ply against a radially internal surface of said outer sleeve, wherein, after turning-up of each of the end flaps around the respective annular anchoring structure and before radial expansion of said at least one carcass ply, only the portion belonging to each of said loops is submitted to heating under pressure, to make each loop integral with said annular anchoring structure, each said portion being located a distance from said annular anchoring structure and at an extremity of the end flap of said at least one carcass ply in contact with said at least one carcass ply.