Patent ID: 6899154

Claim:
A carcass structure for a tyre, comprising: at least one carcass ply; and a pair of annular reinforcing structures; wherein the at least one carcass ply comprises: a first series of strip segments; and a second series of strip segments; wherein the first and second series of strip segments are circumferentially distributed about a rotation axis of the carcass structure, wherein each strip segment comprises at least two filiform elements positioned longitudinally and parallel to each other, wherein the at least two filiform elements are at least partially coated by one or more layers of a first elastomeric material, wherein each strip segment extends according to a substantially U-shaped conformation around a cross-section profile of the carcass structure to define two lateral portions, mutually distanced in an axial direction of the carcass structure, and an annulus portion extending in a radially-outer position between the lateral portions, and wherein each annular reinforcing structure is adjacent to a respective inner circumferential edge of the at least one carcass ply, wherein each annular reinforcing structure comprises: at least one primary portion, comprising an axially-inner side oriented toward terminal edges of the first series of strip segments, and an axially-outer side oriented toward terminal edges of the second series of strip segments; and at least one additional portion adjacent to the terminal edges of the second series of strip segments on an opposite side relative to the at least one primary portion; wherein the at least one primary portion comprises: a first circumferentially-inextensible annular insert; and a filling body; wherein the first annular insert is substantially annulus-shaped, wherein the first annular insert is adjacent to an inner edge of the at least one carcass ply, wherein the first annular insert comprises one or more elongated elements extending in substantially-concentric turns, wherein the filling body comprises the first elastomeric material or a second elastomeric material, and wherein at least one side of the filling body is adjacent to the first annular insert, wherein the at least one additional portion comprises: at least one second circumferentially-inextensible annular insert; wherein the at least one second annular insert is substantially annulus-shaped, wherein the at least one second annular insert comprises one or more elongated elements extending in substantially-concentric turns, wherein the at least one second annular insert is adjacent to the terminal edges of the second series of strip segments, and wherein a radial extension of the at least one second annular insert is less than a radial extension of the first annular insert.