Yarn bulking jet

Claim 1

APPARATUS FOR FLUID TREATMENT OF CONTINUOUS FILAMENTARY MATERIAL FROM A YARN OF CONTINUOUS SUBSTANTIALLY STRAIGHT FILAMENTS INCLUDING A BODY MEMBER HAVING AN ESSENTIALLY FLAT SURFACE AND COVER LYING AGAINST THE SAID SURFACE TOGEHTER COOPERATING TO FORM AN ENCLOSED CHANNEL HAVING A YARN INLET AND EXIT OPENING, RETAINING MEANS FOR POSITIVELY RETAINING SAID BODY MEMBER AND SAID COVER IN CONTACT WITH EACH OTHER AT ONE SIDE OF THE ENCLOSED CHANNEL, SAID COVER AND SAID RETAINING MEANS TOGETHER DEFINING A PAIR OF ELEMENTS, AT LEAST ONE OF SAID PAIR OF ELEMENTS BEING OF RELATIVELY FLEXIBLE CONSTRUCTION IN A REGION SITUATED ON ONE SIDE OF SAID ENCLOSED CHANNEL, SAID FLEXIBLE CONSTRUCTION THEREBY PERMITTING SEPARATION OF SAID BODY MEMBER AND SAID COVER FOR LACING OF SAID YARN WITHIN AND THROUGH SAID CHANNEL WHEN A SEPARATING FORCE IS APPLIED, LIP MEANS ON THE SAID BODY MEMBER AND THE SAID COVER AT THEIR EDGES ON THE SIDE OF THE CHANNEL AWAY FROM SAID REGION, AND MEANS OPERATIVELY CONNECTED WITH THE SAID ECLOSED CHANNEL BETWEEN SAID INLET AND EXIT OPENINGS FOR INTRODUCING FLUID ALONG THE LENGTH OF THE FILAMENTS.