Drawing apparatus and method for air spinning machines with multiple feeds

Drawing method for air spinning machines with multiple feeds, comprising the steps of:

• preparing at least two slivers of textile fibers (N1, N2), to be fed by at least a respective first introducer element (8) and a second introducer element (12), upstream of an air spinning device (16),
• drawing said slivers (N1, N2), separate from each other, with a plurality of pairs of drawing rollers (20), comprising one drive roller (32) and one idle roller (36) per pair, said drawing rollers (28) being suitable to perform a progressive drawing of each sliver (N1, N2) simultaneously intercepted by them,
• wherein at least one drive roller (32) of a pair of said drawing rollers (28), is mechanically split into a first drive roller (40), which intercepts a first sliver (N1) and a second drive roller (44), which intercepts the second sliver (N2),
• said first and second drive rollers (40,44) being operatively connected to separate drive means so that they may be operated at different speeds of rotation, to perform different degrees of drawing of the two slivers (N1, N2) intercepted by said first and second. drive roller (40,44),
• wherein said first drive roller (40) is associated with a first idle roller (52) and said second drive roller (44) is associated with a second idle roller (56), said idle rollers (52,56) being mechanically separate from each other,
• the method comprising the step of feeding said slivers (N1, N2) drawn and separate from each other into a spinning chamber (20) of the air spinning device (4) to obtain a desired blended yarn.