Abstract: A blade for room fans comprising an elongated body extending longitudinally along a longitudinal direction of development and provided with a first end mounted, in use, on a central body movable in rotation around an axis of rotation orthogonal to the direction of development for the movement of at least one air flow intended for the airing/ventilation of rooms, and a second end opposite said first end, the elongated body rotating arranged on a plane of rotation orthogonal to the axis of rotation; wherein the elongated body is provided with a cross section the inclination of which with respect to the plane of rotation and/or the conformation of which varies along the direction of development.

Abstract: A process for the production of manufactured articles in composite material comprises at least one supply phase of a plurality of layers and at least one coupling phase of the layers. The coupling phase comprises at least one step of arrangement of the layers overlapped onto each other to create at least one stratified body. The coupling phase comprises at least one step of positioning the stratified body inside a mould. The coupling phase comprises at least one firing step of the layers positioned inside the mould. The supply phase comprises at least one supply step of at least one basic layer and at least one supply step of at least one reinforcement layer.