Abstract: A winding mechanism for a screen which is stretched in the form of a tunnel during use includes a winding tube which is rotatable about an axis of rotation for winding and unwinding said screen. A guide for the screen is disposed beside the winding tube, which guide is curved in such a manner that the distance via the guide and via the surface of the winding tube surface to a line on the surface of the winding tube that extends parallel to the axis of rotation is the same for all points that are located at the same longitudinal position on the screen. In a further embodiment, a rectilinear auxiliary guide can be disposed between said guide and said winding tube, in such a manner that the screen will make contact therewith over its entire width.

Abstract: A winding mechanism for a screen which is stretched in the form of a tunnel during use includes a winding tube which is rotatable about an axis of rotation for winding and unwinding said screen. A guide for the screen is disposed beside the winding tube, which guide is curved in such a manner that the distance via the guide and via the surface of the winding tube surface to a line on the surface of the winding tube that extends parallel to the axis of rotation is the same for all points that are located at the same longitudinal position on the screen. In a further embodiment, a rectilinear auxiliary guide can be disposed between said guide and said winding tube, in such a manner that the screen will make contact therewith over its entire width.