An object is to improve durability without increasing the tire mass. An aircraft pneumatic tire (10) includes: a carcass ply (12) that straddles between a pair of bead portions (24); an inside belt layer (14) that is provided at a tire radial direction outer side of a crown portion of the carcass ply (12); an outside belt layer (16) that is provided at the tire radial direction outer side of the inside belt layer (14) and that is configured by a cord of cord configuration elements that have been twisted together; a belt protection layer (18) that is provided at the tire radial direction outer side of the outside belt layer (16) and that is configured by a cord of cord configuration elements that have been twisted together; and a low elasticity portion that is provided at at least one of the cord of the belt protection layer (18) or the cord of the outside belt layer (16), and that has a lower elasticity than other length direction portions of the cord (32).

A tyre building plant includes a forming drum and a supply device for supplying an elongated element toward the forming drum. The supply device includes at least one conveyor belt which extends in a supply direction between a loading region, in which the elongated element is loaded on the conveyor belt and an unloading region, a control unit for controlling the loading of the elongated element on the conveyor belt, at least a first detection element which is fixed with a first portion of the conveyor belt, a sensor which is fixed and independent with respect to the conveyor belt and which detects the position of the first portion with respect to the supply device. The loading of the elongated element on the conveyor belt is performed when the first portion is at a predefined reference distance from the loading region.

A tyre building plant includes a forming drum and a supply device for supplying an elongated element toward the forming drum. The supply device includes at least one conveyor belt which extends in a supply direction between a loading region, in which the elongated element is loaded on the conveyor belt and an unloading region, a control unit for controlling the loading of the elongated element on the conveyor belt, at least a first detection element which is fixed with a first portion of the conveyor belt, a sensor which is fixed and independent with respect to the conveyor belt and which detects the position of the first portion with respect to the supply device. The loading of the elongated element on the conveyor belt is performed when the first portion is at a predefined reference distance from the loading region.

Disclosed is a conveying apparatus and method for conveying a tire layer, wherein the conveying apparatus includes a swivel conveyor with at least one endless belt or wire, a first pulley, a second pulley and a third pulley that define a minimal loop (L) for guiding the endless belt or wire along a conveying run and a return run, wherein the third pulley is arranged between the conveying run and the return run, and is swivable about a swivel axis (X) between a first swivel position and a second swivel position. The pivot position is chosen such that the length of the minimal loop when the third pulley is in the first swivel position is the same within a tolerance of less than 1 percent with respect to the length of the minimal loop when the third pulley is in the second swivel position.

The invention relates to a method and centering assembly (1) for centering a tire component (9), wherein the method comprises the steps of placing the tire component on and conveying it from a first conveyor (2) towards a second conveyor (3), determining the position of a first longitudinal edge (91), transversely moving the first conveyor (2) and thereby aligning the first longitudinal edge (91) along a first reference on the second conveyor (3), conveying the tire component from the first conveyor (2) onto the second conveyor (3) while determining the position of a second longitudinal edge (92), wherein the tire component has a center between the first longitudinal edge (91) and the second longitudinal edge (92), conveying the tire component from the second conveyor (3) towards a drum (4), laterally moving the drum (4) to align the center of the tire component with a center of a desired application position of the tire component on the drum, and conveying the tire component from the second conveyor (3) onto the drum (4).

The invention relates to a method and centering assembly (1) for centering a tire component (9), wherein the method comprises the steps of placing the tire component on and conveying it from a first conveyor (2) towards a second conveyor (3), determining the position of a first longitudinal edge (91), transversely moving the first conveyor (2) and thereby aligning the first longitudinal edge (91) along a first reference on the second conveyor (3), conveying the tire component from the first conveyor (2) onto the second conveyor (3) while determining the position of a second longitudinal edge (92), wherein the tire component has a center between the first longitudinal edge (91) and the second longitudinal edge (92), conveying the tire component from the second conveyor (3) towards a drum (4), laterally moving the drum (4) to align the center of the tire component with a center of a desired application position of the tire component on the drum, and conveying the tire component from the second conveyor (3) onto the drum (4).

An apparatus for depositing a piece of band-like elastomeric element on a forming support in a process for building a tyre for vehicle wheels. The apparatus operates by feeding a piece of band-like elastomeric element having a predetermined nominal length towards the forming support along a predetermined feeding direction and measuring the actual length of the piece along the feeding direction. If the actual length is lower than or equal to a circumferential length of a deposition surface defined on the forming support, the piece is deposited on the deposition surface while the forming support rotates about a rotation axis thereof. During such deposition the piece is pressed on the deposition surface with a pressing force selected as a function of the actual length.

An apparatus for depositing a piece of band-like elastomeric element on a forming support in a process for building a tyre for vehicle wheels. The apparatus operates by feeding a piece of band-like elastomeric element having a predetermined nominal length towards the forming support along a predetermined feeding direction and measuring the actual length of the piece along the feeding direction. If the actual length is lower than or equal to a circumferential length of a deposition surface defined on the forming support, the piece is deposited on the deposition surface while the forming support rotates about a rotation axis thereof. During such deposition the piece is pressed on the deposition surface with a pressing force selected as a function of the actual length.

Method for controlling the feed of semifinished products in a tyre building process, said method comprising: feeding a semifinished product (10) into a building station (30) adapted to build, through said semifinished product (10), a structural component of a tyre; performing, in an acquisition zone (AZ), a verification to verify the presence of at least one defect of said semifinished product (10); generating a notification signal (NS) as a function of said verification; activating, as a function of said notification signal (NS), a discard device (60), configured for discarding at least one portion of said semifinished product (10) comprising said at least one defect.

A tread extension device (10) is provided that has first (12) and second (14) tread extensions for holding a tread during brushing operations. A first connecting device (28) connects the first tread extension (12) to a first longitudinal end (18) of the tread, and engages both the first tread extension (12) and the first longitudinal end (18) of the tread. A second connecting device (30) is included that connects the second tread extension (14) to the second longitudinal end of the tread. The second connecting device (30) engages both the second tread extension and the second longitudinal end of the tread. The tread is able to be brushed in both a first direction and a second direction along its underside.