Abstract: A circular knitting machine includes a cylinder with knitting instrumentalities and a cam arrangement for operating the instrumentalities, the cylinder and the cam arrangement being relatively rotatable, a striper associated with the cam arrangement and having a yarn cutting mechanism, an aperture in the cylinder for propelling air outwardly of the cylinder past the instrumentalities to carry yarn ends cut off by the yarn cutting mechanism outwardly of the striper and a means for collecting yarn ends carried outwardly by the air.