Abstract: A cam-based classifier for the treatment of heterogeneous masses of materials comprising a series of rotating elements (15) phase driven around a rotation axis (16) for identifying calibrated passage clearances (17) of a screening plane (14), wherein each of the rotating elements (15) comprises a series of cam elements (20), i.e.

Abstract: A chamber dryer with uniform treatment parameters comprises a drying chamber (20), a feeding (21) of a mass of damp material to be treated (11), an inlet (25) for a mixture of hot gases, an outlet (26) for a portion of heavy dried material (12) and an outlet (27) for conveyor air, wherein the drying chamber (20) is a fixed chamber comprising at least one conveyor bed (23) of the damp material to be treated consisting of a series of adjacent rotating elements (24) having an adjustable interaxis, in which two adjacent rotating elements define a gaugable passage opening (40).

Abstract: A machine for the classification, sieving and separation of non-homogeneous masses of materials comprises a feed (12) for such non-homogeneous masses (11) and a discharge (13) for a coarse portion of material (11A), respectively arranged at opposite ends of a selection bed (14) of the non-homogeneous masses (11) comprising a plurality of rotary elements (15) arranged adjacent to each other and suitable for determining the movement of the material, in which the rotary elements (15) can be spaced apart by a predefinable amount to define passage ports (16) for a portion of material (11B) of predetermined shape and size of the non-homogeneous masses and in which the rotary elements (15) have a cross section with cam profile (17, 18) or variable radius, in other words having a different cross section to the cylindrical section, the cam profile (17, 18) being suitable for developing a sinusoidal peripheral speed of the rotary elements (15).