Patent ID: 8778111

Claim:
A process for manufacturing tyres, the process comprising: building a carcass structure on a primary drum, the carcass structure comprising a liner, at least one carcass ply and a pair of annular anchoring structures associated with each other so as to form a substantially cylindrical carcass sleeve; positioning a crown structure comprising at least one belt structure and a tread band at a radially external position to said carcass structure; and shaping the carcass structure into a toroidal configuration, for associating the crown structure with said carcass structure, wherein during building of the carcass structure, said liner is applied around an outer surface of the primary drum by: circumferentially winding up at least one pair of sheets of elastomeric material around an outer surface of the primary drum, said sheets being axially spaced apart from each other for making respective axially external portions of the liner; and laying at least one continuous elongated element of elastomeric material in the form of a plurality of mutually approached coils around the outer surface of the primary drum so as to form a central portion of the liner having axially external edges that are each associated with an axially internal edge of one of said axially external portions of the liner; wherein abrasion-proof inserts are integrated into the axially external portions of the liner; wherein each of said abrasion-proof inserts is made in a form of a strip coupled to the sheet of elastomeric material comprising the respective axially external portion of the liner; and wherein coupling between said strip and said sheet is carried out before manufacture of the axially external portions of the liner on the primary drum.