THE FORMATION AND STRUCTURE OF FANCY YARNS PRODUCED BY A PRESSURIZED-AIR METHOD

By injecting pressurized air into the fibre-transport channel of a rot or spinner, the normal steady-state conditions are deliberately change d, and thus a fancy yarn is achieved. In order to try to understand ho w the effects in the yarn are built up, the fibre flow through the spi nning process is looked at theoretically and to some extent practicall y, Since the twist normally varies along a fancy yarn, this theme is d ealt with theoretically and by studying enlargements of the fancy yarn , Production limitations in the form of a somewhat reduced breaking st rength are considered.