FILATOIO CON UNO STIRATOIO CONDENSATORE A PIU' STADI

摘要

A spinning machine (17) has a drafting unit (13) has a speed control unit (32d) linked to the drafting roller (29) drive (50). The speed of rotation of the individual rollers is not proportional to each other over an extended period of time. The yarn (22) draft varies with time. A ring-spinning machine has a multi-stage drafting section (13) fed by one or two yarn bobbins (12). The assembly has a number of pairs of rollers (29). The first pair of rollers (25, 26) closely co-located with a perforated suction inlet roller (25) extending over a yarn feed section (15). This operates as a gathering stage in which a group of fibres are brought to a width of 1 mm or less. The suction unit consists essentially of a concave perforated pad with converging channels.