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    Tyre for wheels of heavy transport vehicles
    1.
    发明授权
    Tyre for wheels of heavy transport vehicles 有权

    公开(公告)号：US10807415B2

    公开(公告)日：2020-10-20

    申请号：US15648963

    申请日：2017-07-13

    Applicant: Pirelli Tyre S.p.A.

    Inventor： Alessandro Ascanelli ,  Alexandre Bregantim ,  Giuseppe Cereda ,  Guido Luigi Daghini

    IPC: B60C9/18 ,  B60C9/22 ,  B60C9/00 ,  B60C9/20

    Abstract: A tyre includes a carcass structure including at least one carcass ply, a belt structure applied in a radially outer position with respect to the carcass structure, and a tread band applied in a radially outer position with respect to the belt structure. The belt structure includes two main belt layers and first and second reinforcing strips incorporating a plurality of reinforcing elements arranged substantially in the circumferential direction. The reinforcing elements include at least one high-elongation metal cord including a plurality of intertwined strands, and each strand includes a plurality of filaments. Each filament has a diameter not greater than 0.175 mm.

    Process for manufacturing a type and tyre bead structure
    2.
    发明授权
    Process for manufacturing a type and tyre bead structure 有权

    公开(公告)号：US10766218B2

    公开(公告)日：2020-09-08

    申请号：US14020282

    申请日：2013-09-06

    Applicant: PIRELLI TYRE S.p.A.

    Inventor： Giuseppe Cereda ,  Luca Merlo

    IPC: B29D30/48 ,  B60C15/04

    Abstract: Process for manufacturing a tyre, includes the following steps: (a) winding at least one metal wire so as to form a plurality of coils, the coils being radially superimposed and axially arranged side-by-side with respect to one another, so as to obtain a bead core; (b) applying at least one layer of a crosslinkable elastomeric material to the bead core obtained in step (a), so as to obtain a coated bead core; (c) partially crosslinking the at least one layer of crosslinkable elastomeric material, so as to obtain an amount of free sulfur of 30% by weight to 70% by weight, preferably of 40% by weight to 65% by weight, more preferably of 50% by weight to 60% by weight, with respect to the total weight of the sulfur present in the crosslinkable elastomeric material; and (d) applying a bead filler to the radial outer surface of the bead core obtained in step (c), so as to obtain a bead structure for a green tyre.

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