The Italian company Caperdoni build a unique type of warp knitting machine termed a Waltex machine . Instead of needles, two sets of guide tubes threaded with warp yarn alternate in wrapping a loop around each other. The overlaps on one bar of guide tubes thus intermesh towards the face at their knitting cycle (course). At the next knitting cycle, the overlaps on the second bar of guide tubes intermesh towards the back. A type of 1 x 1 purl warp knitted fabric is thus produced.
The spacing between the guide tubes on the bar corresponds to the gauge, 3 mm being the finest and 14 mm being the coarsest.
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