Striping system for a circular knitting machine

The striper (2) of the system is provided with yarnguide rods (64) which are pivotable to a position conducive to delivery of yarn to the needle (6). The rod (64) to be pivoted is selected by a selector (118) which imposes a small movement on a slide member (100) and this small movement causes the slide member (100) to be moved by a first radial cam (34) such that its movement causes pivoting of the rod (64). Independently of said pivoting, a closing lever (136) and an opening lever (140) respectively adapted to retain and cut the yarn or release it are always moved. The movement of said levers (136, 140) is only effective when at least one yarnguide rod (64) has pivoted. There is a striper (2) for each cam section (14) and all of them are controlled by a single selection box (32) containing the selectors (118).