This paper proves spinning process and principle of over feed effect yarn, and analyses construction characteristic of the over feed effect yarn in the theory and actuality.

The over feed and feeding method in air-texturing, the differential shrinkage rate and average shrinkage in differential shrinking can affect the CV value of air-jet textured yarn remarkably.

Blatt stitch - Schiffli term meaning to feed the yarn, therefore producing a long zig-zag stitch with threads laying close together.