2 50 12 2 8 15 80 2 4 4 51 12 1 9 15 80 3 3 8 45 10 810 15 180 2 4 7 49 13 111 80 280 2 4 7 41 13 1 12 15 80 2 4 69 6 3__________________________________________________________________________ comparative test a spinning test was carried out by means of an apparatus shown in fig1 with polyethyleneterephthalate chips having an intrinsic viscosity u03b7 0 63 the fixed spinning conditions were as follows the other conditions were the same as in example 1 and the resultant yarn was taken up at a speed of 4000 m min as a drawn yarn comprising 34 filaments having 34 denier in total a comparative test was conducted by means of modifications of the spinning apparatus shown in fig1 in which either or both of the liquid bath and the hot chamber were eliminated the characteristics of the resultant yarns obtained by the respective runs are listed in table 3 as apparent from a comparison of run nos 13 through 17 according to the present invention with run nos 18 through 20 according to comparative test the yarns obtained from the present invention were superior to those from the latter in mechanical properties it should be noted that when the depth of the liquid bath was 80 mm the elongation of the resultant yarn was lower than that of the yarn obtained at a 40 mm depth therefore the depth of the liquid bath is preferably 40 mm table 3__________________________________________________________________________liquid bath hot chamber yarn characteristicstemp depth steam pressure strength elongation shrinkage in b w run no u00b0 c mm kg cm sup 2 g g d __________________________________________________________________________13 80 40 1 4 2.