A unit for compacting a bundle of textile fibres drawn in a spinning machine
A fixed tube (11) of circular cross-section, which is common to several spinning stations disposed side by side, is connected to a suction source and has, in each station, a suction slot (15) arranged on the path of a bundle of fibres (1) to be compacted and along its direction of advance. A cylindrical sleeve (16) is freely rotatable on the tube (11) and has a perforated portion (17) which extends around a corresponding slot (15). The sleeve (16) is rotated about the fixed tube (11) by a pressure roller (18) which presses the bundle of fibres (1) against the perforated portion (17) of the sleeve. The sleeve cooperates with an axially stationary retaining element (9a; 25, 26, 28a) which is separate from the tube (11) and is arranged to limit the axial movements of the sleeve along the tube. <IMAGE>