Apparatus for associating a bead filler with a bead core of a vehicle tire

An automatic device for the continuous application of an elastomeric filler on a bead core of a pneumatic tire, each filler comprising a base and an upper part of pre-estabilished shape, said filler having a length equal to the outermost peripheral layout of the core, said device comprising a fixed frame to which are associated two discs in mutual contact along their periphery in order to rotate simultaneously, the first disc comprising a first annular groove to encase the core, the second disc comprising a second annular groove into which the upper part of the filler slides in tangential direction, said second annular groove being adapted to apply the base of the filler on the bead core rotating with the first disc as long as the filler base covers the outermost peripheral layout of the bead core and the two facing ends of the upper part of the filler are opened in the form of a "V" said device being characterized in that it comprises two pairs of two pressure elements, each pair of pressure elements comprising two arms arranged symmetrical to each other with respect to the center plane of the first annular groove of the first disc and rotating around the axis of rotation at one end by means of at least one associated piston of a fluid-dynamic cylinder forming part of a mechanism for imparting thrusts opposite to one another in a pair of two arms, said fluid-dynamic cylinder being externally connected to butt splicing means for the facing ends of the filler whereby when the fluid dynamic cylinder applies the said opposite thrusts the said arms lock the filler to the butt-splicing means, said butt-splicing means applying thrust opposite to one another on the two pair of arms, adjusting and centering means for orienting the first disc comprising the filler in respect of the position of the central symmetrical plane of the two pair of pressure elements, said means comprising a body of geometrical form having at least two lateral faces forming a "V", said body being actuated by a suitable control unit which moves said body between the two facing ends of the filler, and localized compression means, acting on the sides of the filler passing through the second annular groove of the second disc in a direction tangential to the core associated with the first disc, said localized compression means comprising inside the second groove of the second disc, two opposite annular edges whose mutual distance, measured parallel to the axis of the second disc is smaller than the transverse direction of the filler passing through them.