Patent ID: 7931767

Claim:
A process for manufacturing elastomeric components of a tyre for a vehicle wheel, the process comprising: feeding a continuous elongated element from a delivery member by exerting a feeding pressure on an elastomeric material inside the delivery member, the delivery member comprising a pear pump rotating in a first direction during feeding; rotating a building support around a geometrical rotation axis of the building support; carrying out controlled relative displacements between the delivery member and the building support to form a tyre component; stopping the feeding of the elongated element when formation of the tyre component is complete by bringing the gear pump to a standstill; after bringing the pear pump to a standstill, maintaining the pear pump at a standstill for a first predetermined period of time; and after maintaining the gear pump at a standstill for the first predetermined period of time, exerting a counter-pressure inside the delivery member by rotating the pear pump in a second direction, opposite the first direction, for a second predetermined period of time such that the pressure inside the delivery member drops to between about 10 bars and about 50 bars, wherein the first predetermined period of time, the counter-pressure and the second predetermined period of time are predetermined to result in the elastomeric material inside the delivery member reaching a sufficient pressure to ensure reproducibility of the elongated element; wherein feeding the elongated element assists application of the elongated element onto the building support, wherein rotating the building support assists circumferential distribution of the elongated element on the building support, wherein carrying out controlled relative displacements assists transverse distribution of the elongated element on the building support, and wherein the tyre component is defined by a plurality of coils laid in a preestablished deposition pattern depending on a predetermined cross-section outline to be given to the tyre component.