Patent ID: 7055348

Claim:
A high speed color altering head for single-face circular knitting machines installed on a circular knitting machine and controlled by a return cam, a needle selection device and a upper cam and a lower cam of the circular knitting machine to perform colored yarn feeding operation and achieve colored and jacquard knitting effect, comprising: two outer plates located on two outer sides of the color altering head; a plurality of yarn feeding mechanisms located between the two outer plates to provide the colored yarn feeding operation; a plurality of yarn clipping mechanisms located between the two outer plates among the yarn feeding mechanisms in an alternate fashion to clip and sever colored yarns; a plurality of spacers located between the outer plates, the yarn feeding mechanisms and the yarn clipping mechanisms; and a plurality of color selection pressing plates located between the two outer plates, each color selection pressing plate corresponding to one yarn feeding mechanism and one yarn clipping mechanism; wherein the color selection pressing plates are driven by the needle selection device to release the corresponding yarn feeding mechanisms and yarn clipping mechanisms so that the upper and lower cams control the yarn feeding operation of the yarn feeding mechanisms and yarn severing operation of the yarn clipping mechanisms at high speed without dropping the yarns.