A pneumatic vehicle tire at least having: a tread including an outer tread cap with a profiled tread and an inner tread base, a carcass, a bead region with a bead core, an inner layer and sidewalls is provided. The material thickness (d(2)) of the tread base is configured to decrease from the center of the tread toward each of the side walls. Furthermore, a method for retreading a pneumatic vehicle tire is provided.

A pneumatic vehicle tire at least having: a tread including an outer tread cap with a profiled tread and an inner tread base, a carcass, a bead region with a bead core, an inner layer and sidewalls is provided. The material thickness (d(2)) of the tread base is configured to decrease from the center of the tread toward each of the side walls. Furthermore, a method for retreading a pneumatic vehicle tire is provided.

The invention includes methods for forming a retreaded tire and treads there for. Particular embodiments of such methods include providing a tire carcass configured to receive a tire tread along an annular tread-receiving area and a pre-formed tread comprising a tread body and a submerged void arranged along a bottom side of the tread and extending into the tread thickness to a top end located below the top side of the tread, the submerged void having a length and an opening arranged along the bottom side when the tread is in an uninstalled configuration, where the opening of the submerged void extends in a direction of the submerged groove length along an alternating, non-linear path. Further steps include assembling a retreaded tire by arranging the tire tread atop a bonding layer arranged between the tire tread and the tire carcass and comprising uncured bonding material.

A retreading method for a tire comprising an electronic assembly (1) provided with an electronic module, a rubber patch fastened to an inner wall of the tyre, said patch including a seat designed to house an active portion of the electronic module, comprises the following steps: removing the electronic module from the patch used for fastening, placing a protective cover (40) that is resistant to vulcanization on the patch so as to cover the patch, placing a new tread on the tire, vulcanizing the tyre with the new tread, removing the protective cover (40) from the patch, and re-inserting the electronic module into the rubber patch.

A retreading method for a tire comprising an electronic assembly (1) provided with an electronic module, a rubber patch fastened to an inner wall of the tyre, said patch including a seat designed to house an active portion of the electronic module, comprises the following steps: removing the electronic module from the patch used for fastening, placing a protective cover (40) that is resistant to vulcanization on the patch so as to cover the patch, placing a new tread on the tire, vulcanizing the tyre with the new tread, removing the protective cover (40) from the patch, and re-inserting the electronic module into the rubber patch.

A method of retreading a tire casing includes the step of disposing a cured rubber tread on a carcass with a layer of hot-melt material interposed between the tread and the carcass. The method continues with the step of rollering the tread by means of at least one roller with a width (r) that is less than a width (b) of the tread.

A method of retreading a tire casing includes the step of disposing a cured rubber tread on a carcass with a layer of hot-melt material interposed between the tread and the carcass. The method continues with the step of rollering the tread by means of at least one roller with a width (r) that is less than a width (b) of the tread.

Mould for moulding a tread of a tire, this tread having a thickness of material to be worn away and a tread surface intended to come into contact with the road surface when the tire is running, this mould having a moulding surface intended to mould the tread surface of the tread, and having a moulding element formed of a blade and a bar, the blade being attached to the moulding surface to mould a sipe in the tread, the bar, borne by the blade to form an enlarged part of maximum width D, being intended to mould a channel in the tread, this channel itself being intended to form a new groove when the tread becomes part worn. Each blade is delimited by two lateral faces forming between them a mean angle of between 6° degrees and 18°. The blade width decreasing from the mould surface when new, as far as the connection with the bar, the blade width meets the bar being at least equal to between 0.2 and 0.4 times the maximum width D.

Mould for moulding a tread of a tire, this tread having a thickness of material to be worn away and a tread surface intended to come into contact with the road surface when the tire is running, this mould having a moulding surface intended to mould the tread surface of the tread, and having a moulding element formed of a blade and a bar, the blade being attached to the moulding surface to mould a sipe in the tread, the bar, borne by the blade to form an enlarged part of maximum width D, being intended to mould a channel in the tread, this channel itself being intended to form a new groove when the tread becomes part worn. Each blade is delimited by two lateral faces forming between them a mean angle of between 6° degrees and 18°. The blade width decreasing from the mould surface when new, as far as the connection with the bar, the blade width meets the bar being at least equal to between 0.2 and 0.4 times the maximum width D.

This invention provides an envelope configuration for retreading tires using a cold-retreading process. Envelopes formed by two parts are known in the prior art. However, the known sealing means between parts are not satisfactory, either due to sealing problems or due to decreasing the envelope useful life. In order to overcome these limitations, this invention provides an envelope (20) comprised of two parts (22, 24), in which an end region (224a) of a flap (224) of the first part (22) is covered by an end region (244a) of a flap (244) of the second part (24), or vice-versa, in order to form an overlapping joint, in which a free end of the flap (224) of the first part (22) has at least one differentiated cross section (224b) whose thickness is greater than that of the flap (224) of the first part (22), and in which the overlapping joint is covered by an elastic ring (26) that is wide enough to cover said differentiated cross section (224b).