The machines are completely faired and provided with some safety devices according to the CE regulations in force. The dryers model 250 P are pass-through machines with automatic loading through a trolley tilter. All the models are provided with some digital electronic instruments for the control of the times and of the temperatures of the cycle. The dryers mod. 250 P can be realized either with steam or with gas heating. The gas models are provided with a burner with an adjustable flame built according to the CE regulations in force. All pss-through dryers can be loaded either by means of a fixed trolley tilter or through a SHUTTLE conveyor. The unloading can be carried out either in the trolleys or on a belt conveyor.