A bead portion of a tire includes a bead core, a first bead filler arranged at a radially outer side of the bead core, a first carcass extending around the bead core and the first bead filler, a second carcass extending radially inward and adjacent the first carcass, a second bead filler disposed axially adjacent the second carcass, a first chafer disposed at an axially outer side of the second bead filler, a second chafer extended about a radially inner end of the first carcass, and a flipper extending radially inward from a position axially adjacent an axially outer side of the first bead filler. The flipper further extends axially inward adjacent a radially inner side of the bead core. The flipper further extends radially outward to position axially adjacent a first part of the first carcass, a second part of the first carcass, the second carcass, and a radially outermost end of the first bead filler.

A device for manufacturing a multiple layer rubber strip including a first rubber strip and a second rubber strip, the device includes a first rubber extruder for extruding the first rubber strip, a second rubber extruder for extruding the second rubber strip, a first conveyor for conveying the first rubber strip extruded from the first extruder to a downstream side in a convey direction, and a second conveyor for conveying the second rubber strip extruded from the second extruder to a downstream side in the convey direction. The second conveyor is located upwardly of the first conveyor and has a downstream conveyor end which positions above a conveying surface of the first conveyor such that the second rubber strip delivered from the downstream conveyor end meets and overlaps the first rubber strip on the first conveyor at a joining location to form the single multiple layer rubber strip.

Disclosed is an assembly and method for processing bead-apexes. The assembly includes a weighing device for measuring the weight of one of the bead-apexes and at least one station for supplying or receiving the bead-apexes to or from the weighing device in a supply direction or a discharge direction, respectively. The assembly further includes a frame for supporting the at least one station, wherein the weighing device has a weighing member for receiving and supporting one of the bead-apexes and a base member connected to and forming a base for the weighing member. The weighing device is arranged for measuring the weight of the one bead-apex on the weighing member, while the weighing member is arranged for keeping the one bead-apex stationary during the weighing, while the frame of the assembly and the base member of the weighing device are supported independently.

A manufacturing method of a bead core of the present disclosure comprises an annular body forming step of winding a strip member formed by coating one or more bead wires with a coating resin to form an annular body, and a resin coating step of coating the annular body formed in the annular body forming step with a resin.

A bead member for a tire, including: a bead wire; a first bead filler that is in contact with the bead wire directly or via another layer and is arranged in a region including at least a region at an outer side of the bead wire in a tire radial direction; and a second bead filler that is in contact with the first bead filler directly or via another layer and is arranged in a region including at least a region at an outer side of the first bead filler in the tire radial direction, the first bead filler including a resin A, the second bead filler including a resin B, and the resin A having a melting point higher than that of the resin B.

A method for forming a composite apex, the method comprising the steps of: forming a coextruded strip of a first compound and a second compound, wherein the second compound is a compound different than the first compound, wherein the apex is formed from winding the coextruded strip while varying the ratio of the first compound to the second compound.

A process for producing tyres including building a green tyre having two bead structures. Each bead structure includes a bead filler. The bead filler or another rigid component of the green tyre includes a final elastomeric compound produced by the following: feeding elastomeric polymer and reinforcement filler to a first batch mixing device; mixing and dispersing the reinforcement filler in the elastomeric polymer and unloading the obtained elastomeric compound; feeding the obtained elastomeric compound, along with at least 5 phr of reinforcement resin, to a continuous mixing device of intermeshing and co-rotating twin-screw or multi-screw type or of planetary type; mixing the reinforcement resin in the elastomeric compound and unloading the obtained elastomeric compound; and feeding the obtained elastomeric compound along with the components capable of facilitating the cross-linking to a second batch mixing device and mixing to obtain the final elastomeric compound. The first and second batch mixing device have two counterrotating rotors.

Provided is a stretching device for stretching an apex filler strip prior to application to a bead for a tire. The stretching device includes a stretching roller and a plurality of guide rollers for guiding the apex filler strip in a loop around the stretching roller. The plurality of guide rollers is arranged for receiving the apex filler strip in an entry orientation and for discharging the apex filler strip in an exit orientation. The plurality of guide rollers is arranged for guiding the one side of the apex filler strip in the entry orientation and the exit orientation under angles different from the support angle (H) with respect to rotation axis (R) of the stretching roller such that the apex filler strip is twisted over a twisting angle of at least forty-five degrees.

To suppress occurrence of curl at an edge part of a bead filler at the time of producing a pneumatic tire. A method of producing a pneumatic tire includes the steps of fabricating a bead member by integrating a bead filler formed by extrusion molding with a bead core in a state where a temperature difference between an edge part and a root part of the bead filler is 25 C. or less as well as a temperature at the edge part is 39 C. or more, cooling the bead member by being placed on a support surface supporting a side surface of the bead filler and forming a green tire using the cooled bead member.

A tire includes a number of ring-shaped tire structures which constitute the tire, and a ring-shaped rubber sheet which is integrated with an electronic component, in which the ring-shaped rubber sheet that is integrated with the electronic component is arranged between the number of ring-shaped tire structures.