The fabric passes:
by a small branch, which regulates the height of the fabric in the weft direction;
by a steam humidifier and a heated drum, which evenly humidify the fabric;
through an apparatus made up of a very thick special rubber mat (see figure A, point 2) which runs carried by three tensioning cylinders (fig. A, 3), controlled by the respective tension regulators (fig. A, points 4 and 5) ).
The moistened fabric passes between the carpet and the heated cylinder (fig. A, 1), with an arc of contact that is greater than 180 °.
The desired retraction is proportional to the pressure of the belt and to the speed between the rubber mat and the heated cylinder.