These machines for the manufacturing of men's socks have had to face tough competition from simpler single-cylinder machines with needles in the dial; in fact, now only a few machine manufacturers offer double-cylinder machines, despite the indisputable excellent quality of the rib socks they produce.
From a technical point of view, small-diameter/double-cylinder machines feature one series of double latch needles which can work either in the lower or in the upper cylinder. The stitch formation and the needle transfer are carried out the same way as on double-cylinder/large-diameter machines.
Technical development in this field points towards higher throughput speeds with the same number of the feed systems (from 2 to 3). Usually, these machines too incorporate electronic drive and needle-by-needle selection systems.
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