Abstract: A blending equipment mounted on the ceiling of a blending bin has a conveyor airduct for introducing materials or raw cotton from the exterior of the blending bin into the interior thereof. The conveyor airduct has a lower end with which one end of a spreader outlet is communicated, the other end of the spreader outlet being opened laterally within the blending bin. The opening of the spreader outlet turns round a vertical axis. A lower member of the spreader outlet defining the opening is moved up and down. Rotation of the spreader outlet and oscillation of the lower member of the spreader outlet are effected simultaneously. Thus, the materials fed into the blending bin through the conveyor airduct are evenly scattered from the opening of the spreader outlet not only at a position below the blending equipment but also set positions more remote therefrom.