The beam dyeing machine operates with the same
principle as that of package dyeing machine. It can be effectively used
to dye yarn or fabric. The process works like this, fabric or yarn in
open width is rolled on to a perforated beam. The beam then subsequently
slid into a vessel that is closed and pressurized. The colour
impregnates the fabric as the dye liquor is allowed to go on circulating
through the perforations in the beam. Usually the beam machines are
designed in such a manner so as to hold a single beam or multiple beams
in a batch.