mechanical backup pressure in the compression chamber 3 the thread 1 is three dimensionally bent and or kinked crimped in a geometrically irregular manner the forming of the thread 1 can be assisted by hot air or steam flow into the compression chamber 3 for this purpose the device has a corresponding inlet 7 the thread sheet crimped in the compression chamber 3 also called a stuffer box forms a thread plug against the force loaded retaining flap 4 which plug as soon as the plug pressure exceeds the counter force of the retaining flap 4 leaves the compression chamber 3 again the level of the retaining force resistance determines here the intensity of the three dimensional forming formed in the plug i e the intensity of the frieze character the frieze character is influenced by means of changing the retaining flap force by means of an adjusting device e g a wheel with a scale to activate a torsional spring the axis of the retaining flap 4 can be acted upon to loads the retaining flap 4 in the opposite direction the depositing tube 5 ensures the controlled depositing on a conveyor belt 6 in other words from the compression chamber 3 the thread 1 runs through a depositing tube 5 the outlet opening of which is fixed and points in the direction of the conveyor belt 6 the frieze yarn formed slides down under its.