Patent ID: 9409360
Filing Date: 2016-08-09
CPC Classification: B29D

Claim Text:
1. A process for manufacturing a tyre for a vehicle wheel, comprising building on a forming support a carcass structure comprising a carcass ply, and, at an end edge of said carcass ply, an annular anchoring structure comprising a substantially circumferential annular insert and a filling insert associated with said substantially circumferential annular insert, wherein budding said carcass structure comprises: positioning said annular anchoring structure on said carcass ply by a positioning member which moves along a pressing direction to bring said substantially circumferential annular insert into contact with said end edge of said carcass ply; pressing said filling insert onto said end edge of said carcass ply; and turning up, with a turning-up member, said end edge onto itself so as to form a turned up end portion of said carcass ply comprising said annular anchoring structure, wherein at the end of said turning up the end edge, the turning-up member is in contact with a free end portion of said end edge; wherein pressing said filling insert onto said end edge of said carcass ply is carried out while said substantially circumferential annular insert is retained in a contact position with said end edge of said carcass ply by said positioning member; wherein pressing said filling insert comprises pushing said filling insert by exerting thrust on a radially inner portion of a side surface of said filling insert by a plurality of rollers arranged side by side in a circumferential direction; wherein each of said rollers is elastically coupled to a thrust member through a respective spring which exerts its elastic action in a direction coincident with its axis only in a respective radial plane of the forming support during pressing the filling insert, said elastic action exertion direction being different from said pressing direction; wherein the turning-up member is separately operative from the thrust member; wherein pushing said filling insert comprises axially moving said thrust member for exerting said thrust on a different portion of said side surface of said filling insert starting from said radially inner portion to continue on a radially outer portion of the side surface of said filling insert with respect to said radially inner portion; wherein each of said rollers is rotatably attached to a respective arm at a roller attachment position, an end of each respective spring is pivotally attached to its respective arm at a fixed position on its respective arm, and an opposite end of each respective spring is attached to the thrust member at a respective spring attachment position; and wherein, during the step of pressing said filling insert, said thrust member slides against said positioning member and prior to the sliding of the thrust member against the positioning member, each arm is oriented such that its roller attachment position is nearer than its spring's fixed attachment position to an axis of rotation of the support in a radial direction of the support.