Tread application device

Tread application device for applying a tread on a building drum for a tyre, comprising:

• a tread conveying device for conveying the tread to the building drum, from a feed side of the tread conveying device to a discharge side of the tread conveying device in a conveyance direction, comprising a main conveyor belt extending from the feed side to the discharge side in the conveyance direction, and auxiliary conveyor belts on both sides of the main conveyor belt and which each comprise a feed conveyor belt and a discharge conveyor belt, a slit-shaped opening between the feed conveyor belt and the discharge conveyor belt, positioned for on both sides of the main conveyor belt forming a slit, and a recorder, preferably an image recorder, such as a camera or line scan camera, above or below the slit, and
• a positioning device for positioning the tread on the building drum, wherein the positioning device comprises measuring means at the feed side for determining the position of a segment of the tread and generating a position value, displacement means for displacing the segment of the tread with a displacement directional component parallel to the axis of rotation of the building drum, and control means, connected to the measuring means and the displacement means, for on the basis of the position value controlling the displacement device during the application of the segment of the tread on the building drum.