The calendering unit is composed of a large rough cylinder (see figure A, point 1) and a hollow and mobile tray (fig. A, 2), covered with a stainless steel or brass sheet. The fabric flows between the smooth plate of the basin and the cylinder which, by rotating, drags the piece. The fabric is pressed
to the cylinder from the bowl with adjustable pressure. Steam circulates inside the cylinder and basin,
which can reach and maintain a uniform temperature of 120-130 ° C, with relative discharge of
condensation. The piece passes in succession through: a tension piece (fig. A, 3), which regulates the incoming tension;
a metal detector (fig. A, 8), which stops the machine if it detects a ferrous body in the fabric (darning needle, needle, etc.), to avoid damage to the calendering unit;
two rotating brushes, one on the right side (fig. A, 4) and the other on the reverse side (fig. A, 5), which eliminate residual dirt from the fabric that a suction system then conveys into suitable containers;
a stainless steel plate or cylinder with a herringbone surface, which holds the stretched fabric;

a steaming tank (fig. A, 6), which allows a slight retraction in height and gives stability
to ironing;
a boost cylinder (fig. A, 7), which, if used as such, allows to contain
to the minimum the tension of the fabric in the sense of the warp, decreasing its elongation;
the calendering unit and then in
a cooling and conditioning area (fig. A, 9) or more simply a cylinder
swivel perforated with forced air suction, cools the fabric;
a folding machine (fig. A, 10) or a roller.
In the passage of the fabric between the cylinder and the basin, the right side of the fabric is in contact with the cylinder.
When you want to get a shiny right, especially on pile fabrics, the right comes
placed in contact with the basin because in this way a greater shine is obtained.
For tubular knitted fabric, before entering the machine, it is necessary to make it widen
the piece by means of a device consisting of two expanding units (see figure B, point 1) e
by a series of two felt-covered wheels (fig. B, 2) for each expanding unit they serve
for advancing the fabric. A manual device to set the height of the mesh
(fig. B, 3) by moving the blocks, it allows the fabric to be introduced into the calender well
lying down.