Patent ID: 7878443

Claim:
A yarn-changing method in a warping machine having yarn-changing units, comprising steps of: (a) stopping rotation of a rotary creel having a plurality of working yarn packages and preparing a yarn package from the rotary creel for proceeding; (b) sucking a yarn of the original yarn package and delivering the yarn for proceeding, including determining and detecting by using a sensor if the yarn of the original yarn package is ready for proceeding; (c) clipping the yarn of the original yarn package and delivering the yarn to a connecting unit; (d) taking a new color-changing yarn package for proceeding and then delivering a yarn of the new color-changing yarn package to the connecting unit; (e) connecting the yarn of step (c) and the yarn from the new color-changing yarn package of step (d) by the connecting unit; and (f) starting rotation of the rotary creel to change the color of one yarn package in the warping machine, wherein the new color-changing yarn package in step (d) is taken from a storing creel having a plurality of new color-changing yarn packages by a swing arm for changing color.