spun from spinneret 1 into a chimney 2 the upper portion of which may be equipped with a blowing system 34 a 34 after drawing stretching solidification and adequate cooling the freshly spun monofilament 3 is taken up by a draw off unit here a winding unit 4 which in its base position i is located vertically below spinneret 1 thereby monofilament 3 except for minor deviations due to blowing 34 a 34 travels from spinneret 1 vertically down towards winding unit 4 to visualize the 34 phenomenon of natural yarn deflection 34 to be utilized according to the invention winding unit 4 is shifted laterally from base position i fig1 to position ii cf fig2 monofilament 3 is displaced not as might have been expected in a parabolic or similar curve suspended freely from spinneret 1 to winding unit 4 but initially moves as if the winding unit were in base position i vertically downward then one observes a zone 3a in which the monofilament is deflected laterally at first away from winding unit 4 and subsequently describing an arc follows a path leading practically straight to winding unit 4 this monofilament segment is identified as 3b whereby adjunct ii is related to position.