A pneumatic tire has a rubber member constructed by a rubber ribbon winding body formed by spirally winding a rubber ribbon. The rubber ribbon includes a composite rubber ribbon which is formed by a non-conductive rubber, and a conductive rubber partly covering the non-conductive rubber. The composite rubber ribbon has a flat cross sectional shape and is gradually reduced in its thickness toward both ends. The conductive rubber has a cross sectional area which is equal to or less than 3% of a cross sectional area of the composite rubber ribbon, and forms a surface in one side and a surface in the other side in both ends of the composite rubber ribbon. The composite rubber ribbons that are adjacent in the width direction are partly overlapped, and a conductive route is provided by the conductive rubber connected between the composite rubber ribbons.

A pneumatic tire has a rubber member constructed by a rubber ribbon winding body formed by spirally winding a rubber ribbon. The rubber ribbon includes a composite rubber ribbon which is formed by a non-conductive rubber, and a conductive rubber partly covering the non-conductive rubber. The composite rubber ribbon has a flat cross sectional shape and is gradually reduced in its thickness toward both ends. The conductive rubber has a cross sectional area which is equal to or less than 3% of a cross sectional area of the composite rubber ribbon, and forms a surface in one side and a surface in the other side in both ends of the composite rubber ribbon. The composite rubber ribbons that are adjacent in the width direction are partly overlapped, and a conductive route is provided by the conductive rubber connected between the composite rubber ribbons.

A method for controlling the thickness of a continuous elongated element made of elastomeric material, applied according to coils wound on a forming support, includes: advancing a head end of the continuous elongated element toward the forming support; subjecting, during the advancement, the continuous elongated element to a first stretching with a first stretch coefficient before applying on the forming support; and subjecting, during the advancement, the continuous elongated element to a second stretching with a second stretch coefficient during the application on the forming support. During the first stretching, a span of the continuous elongated element adjacent to the head end is stretched with a supplementary stretch coefficient greater than the first stretch coefficient, in a manner so as to confer, also to the span adjacent to the head end, a stretch and a section similar or substantially equivalent to those of the rest of the continuous elongated element.

A tire production device includes a supply unit to supply a ribbon strip molded into a ribbon shape; and a tire molding unit to stick the ribbon strip onto an outer periphery of a drum having an inner peripheral shape of a tire, while rotating the drum, in which the supply unit has a sticking position at which the ribbon strip is stuck onto the outer periphery of the drum. The tire molding unit includes: the drum with a horizontal rotation axis; a turning table that turns the drum around a vertical axis while maintaining a horizontal rotation axis of the drum; and a parallel movement mechanism provided on the turning table to move the drum in parallel along a horizontal surface set to the turning table, and in which the rotation axis extends in a tangential direction centered on the axis line about which the turning table turns.

A tire production device includes a supply unit to supply a ribbon strip molded into a ribbon shape; and a tire molding unit to stick the ribbon strip onto an outer periphery of a drum having an inner peripheral shape of a tire, while rotating the drum, in which the supply unit has a sticking position at which the ribbon strip is stuck onto the outer periphery of the drum. The tire molding unit includes: the drum with a horizontal rotation axis; a turning table that turns the drum around a vertical axis while maintaining a horizontal rotation axis of the drum; and a parallel movement mechanism provided on the turning table to move the drum in parallel along a horizontal surface set to the turning table, and in which the rotation axis extends in a tangential direction centered on the axis line about which the turning table turns.

In a manufacturing method of a tire which manufactures a side-wall rubber as a constituent member of the tire by winding a rubber strip formed of unvulcanized rubber on a carcass ply serving as a rotating body, the method includes the steps of: winding the rubber strip prior to vulcanization in a spiral manner having a partially overlapping region, so that at least part thereof is exposed at an outer surface, and another portion thereof is covered by the rubber strip after being wound; and arranging an electronic component so that the electronic component is positioned in the partially overlapping region of the rubber strip or between the carcass ply, etc. serving as the lower layer member of the rubber strip and the rubber strip, in the winding step or an earlier step thereto.

In a manufacturing method of a tire which manufactures a side-wall rubber as a constituent member of the tire by winding a rubber strip formed of unvulcanized rubber on a carcass ply serving as a rotating body, the method includes the steps of: winding the rubber strip prior to vulcanization in a spiral manner having a partially overlapping region, so that at least part thereof is exposed at an outer surface, and another portion thereof is covered by the rubber strip after being wound; and arranging an electronic component so that the electronic component is positioned in the partially overlapping region of the rubber strip or between the carcass ply, etc. serving as the lower layer member of the rubber strip and the rubber strip, in the winding step or an earlier step thereto.

A tire comprises a tread portion provided with a band composed of at least one band cord wound spirally and circumferentially of the tire and embedded in the tread portion. When a band cord piece is taken out from the above-said at least one band cord embedded in the tread portion and measured for the length, a length Lb is equal to or smaller than a length La at least in a part of the tread portion, where the length Lb is measured at a first point of time after the band cord piece has been taken out, and the length La is measured at a second point of time after the first point of time.

The invention relates to a pneumatic vehicle tire, which has a tread (1), which has a tread segment (6) that is arranged radially outside, said tread segment having a material strip (7) that is arranged helically in windings approximately in the circumferential direction, wherein the material strip (7) in the region of the tread segment (6) has at least two layers (8, 9) in the longitudinal direction of the material strip, wherein the first layer (8) is formed of a first rubber mixture and the second layer (9) is formed of a second rubber mixture and wherein the layers (8, 9) connect the radially outer surface (10) to the radially inner surface (11) of the tread segment (6). The problem addressed by the invention is the creation of a pneumatic vehicle tire that has advantageous snow driving behavior and, at the same time, improved properties on a dry roadway. In addition, the tire should be simple to produce. This problem is solved in that the second rubber mixture has a Shore A hardness that is greater than the Shore A hardness of the first rubber mixture by at least 2 Shore A, preferably by 4 Shore A to 12 Shore A, and in that the first and the second rubber mixtures have approximately the same stress value. The invention further relates to a method for producing such a pneumatic vehicle tire.

The invention relates to a pneumatic vehicle tire, which has a tread (1), which has a tread segment (6) that is arranged radially outside, said tread segment having a material strip (7) that is arranged helically in windings approximately in the circumferential direction, wherein the material strip (7) in the region of the tread segment (6) has at least two layers (8, 9) in the longitudinal direction of the material strip, wherein the first layer (8) is formed of a first rubber mixture and the second layer (9) is formed of a second rubber mixture and wherein the layers (8, 9) connect the radially outer surface (10) to the radially inner surface (11) of the tread segment (6). The problem addressed by the invention is the creation of a pneumatic vehicle tire that has advantageous snow driving behavior and, at the same time, improved properties on a dry roadway. In addition, the tire should be simple to produce. This problem is solved in that the second rubber mixture has a Shore A hardness that is greater than the Shore A hardness of the first rubber mixture by at least 2 Shore A, preferably by 4 Shore A to 12 Shore A, and in that the first and the second rubber mixtures have approximately the same stress value. The invention further relates to a method for producing such a pneumatic vehicle tire.