Spinning machine with condensing suction rotor for a drafting frame

A spinning machine comprising:

• a drafting frame for receiving rovings and formed with a plurality of roller pairs successively engaging respective rovings for drafting same to produce drafted rovings, said roller pairs including a pair of output rollers having a nip through which a respective roving passes and a plane tangent to said output rollers at said nip;
• a respective spinning station receiving each of said rovings from said drafting frame and including a spindle rotatable to twist the respective roving and wind the respective roving into a yarn body;
• a condensing suction rotor at each of said stations for compacting the roving received from a respective output roller pair and supplying the compacted roving to the respective spinning station, said suction rotor having a circumferential row of perforations lying in a plane and being mounted for rotation about an axis such that said perforations lie substantially in said plane tangent to said output rollers at the respective nip, said suction rotor being connected to a suction source for generating suction over a limited portion of the circumference of said rotor along a compaction zone;
• and
• a respective pressing roller having an axis parallel to the axis of said suction rotor and bearing upon said circumference of said suction roller at a downstream end of said compaction zone, the roving passing between said pressing roller and said suction rotor.