Idle (upper - lower) cylinders with equal pressure for Foulard made from steel tube with bearing shaft in 39NiCrMo3 steel on oscillating roller bearings and locking heads with tubular steel flanged externally and in AISI. Equal pressure (control) cylinders with anti-rotation toothed joint in steel for Foulard made from steel tube with bearing shaft in 39NiCrMo3 steel on oscillating roller bearings and locking heads with external flanged steel tube in AISI.