Yarn-piecing apparatus and method with yarn collation by vacuum

Abstract

Abstract A yarn-collating vacuum means and method are disclosed for use in association with a yarn-piecing apparatus having a freely rotatable roller as the yarn-proffering element thereof, to assure the consistent and strong joining of diverse yarn-ends despite offset of their threadlines prior to the piecing operation. The vacuum means has a mouth opening positioned below and close to the roller so as to be in line with the yarn-end entrained on the roller and depending therefrom. In operation, as the roller bearing the entrained end approaches another yarn-end to be pieced therewith, the vacuum means, in a yarn-collating action, draws in air currents and with them draws the other end into engagement with the entrained end. The entrained end at this time is clamped and twisted to hold it in a spaced away relation to the vacuum means mouth and to impart to it an overtwist. It is then released to untwist and in so doing intertwines with the other end collated therewith. The roller then is rotated to unentrain the first end. The mouth of the vacuum means, in preferred embodiments, is bevelled and/or has grooves in line with the threadline of the entrained end to permit close, yet spaced away relation thereto for better yarn collation.

Inventors

• 👤 Albert D Harmon

Bibliographic Details