Circular knitting machines

摘要

A circular knitting machine includes a pneumatic tensioning duct which receives the article being knitted on the rotating needle cylinder of the machine. In order to prevent the article from twisting in the duct during knitting of the article, the article is retained in a rotating portion of the duct by a very flexible tubular grid structure which is located in the rotating portion and which has a constriction to prevent passage of the article. At the end of knitting, the constriction in tubular grid structure is temporarily removed to permit passage of the article.