Method for making a reinforcing structure for a vehicle tyre and a tyre made by the method

A method for making a reinforcing structure for a vehicle tyre, comprising:

• laying down at least one continuous thread element onto a support element;
• wherein laying down the at least one thread element generates several layers of the at least one thread element,
• wherein a path of the at least one thread element is substantially concentric with a rotation axis of the tyre,
• wherein the at least one thread element is laid down according to an undulated trajectory,
• wherein the undulated trajectory comprises a plurality of waves succeeding each other along a first line circumferentially extended around the rotation axis of the tyre,
• wherein each layer is generated by laying down the thread element according to the undulated trajectory circumferentially developed along the first line common to all of the several layers, and
• wherein the method is carried out on a toroidal support by alternately shifting an application point of the at least one thread element along a movement direction radial to a rotation axis of the toroidal support, while the toroidal support is driven in rotation around the rotation axis of the toroidal support.

A tyre for a vehicle wheel, comprising:

• a carcass structure;
• a pair of circumferentially inextensible annular anchoring structures;
• reinforcing structures disposed at axially opposite side portions of at least one carcass ply of the carcass structure at axially external positions relative to the at least one carcass ply;
• a belt structure applied to a crown portion of the at least one carcass ply at a radially external position relative to the at least one carcass ply;
• a pair of sidewalls applied to the reinforcing structures at axially external positions relative to respective reinforcing structures;
• and
• a tread band applied to the belt structure at a radially external position of the belt structure;
• wherein ends of the carcass structure are engaged with respective annular anchoring structures,
• wherein the side portions of the at least one carcass ply are separated from each other by the crown portion of the at least one carcass ply,
• wherein each side portion extends radially away from one of the annular anchoring structures toward the crown portion,
• wherein each reinforcing structure comprises several layers of at least one continuous thread element extending according to an undulated trajectory,
• wherein the at least one thread element in each layer is distributed according to the undulated trajectory circumferentially developed along a line common to all of the several layers, and
• wherein the undulated trajectory comprises a plurality of waves succeeding each other along the line circumferentially extended around a rotation axis of the tyre.

A tyre for a vehicle wheel, comprising:

• a carcass structure;
• a pair of circumferentially inextensible annular anchoring structures;
• reinforcing structures disposed at axially opposite side portions of at least one carcass ply of the carcass structure at axially external positions relative to the at least one carcass ply;
• a belt structure applied to a crown portion of the at least one carcass ply at a radially external position relative to the at least one carcass ply;
• a pair of sidewalls applied to the reinforcing structures at axially external positions relative to respective reinforcing structures;
• and
• a tread band applied to the belt structure at a radially external position of the belt structure;
• wherein ends of the carcass structure are engaged with respective annular anchoring structures,
• wherein the side portions of the at least one carcass ply are separated from each other by the crown portion of the at least one carcass ply,
• wherein each side portion extends radially away from one of the annular anchoring structures toward the crown portion,
• wherein each reinforcing structure comprises two or more layers of at least one continuous thread element extending according to an undulated trajectory,
• wherein the undulated trajectory comprises a plurality of waves succeeding each other along a first line circumferentially extended around a rotation axis of the lyre, and
• wherein the undulated trajectory comprises a plurality of waves succeeding each other along a second line circumferentially extended around a rotation axis of the tyre in at least two of the layers.