| 摘要 |
An apparatus for bulking and/or crimping multifilament yarns by driving the yarn in a stream of gaseous fluid through a passage containing a constriction is cleaned by introducing periodically upstream from the constriction a quantity of non-gaseous material in the form of discrete particles into the fluid stream. Apparatus for performing the cleaning action includes means arranged to introduce the non-gaseous material into the fluid stream in the form of discrete particles. The non-gaseous material may be a solid material or a liquid material. |
