Patent ID: 7690225

Claim:
Flexible protective corrugated tube comprising at least two different yarns and a plurality of larger diameter zones and smaller diameter zones which are alternated along the length of the tube, characterized in that some first yarns form a weave of weft courses combined with stitch courses, wherein the structure of the fabric comprises a weave of chain stitches from a first row of pins and a weave of weave-weft courses from a combination of one or more subsequent rows of pins to give the tube a peak and trough profile, the tube thereby forming a structure characterized by trough areas and peak areas, the length or width of each trough determined by a repetition of at least one weave area, whereby a variation in the weave structure of the yarns has an effect on tube flexibility and bendability apart from that produced by the different types of yarn used and the density of the stitches.