Abstract: The present invention relates to fluid jet interlace apparatus and related methods for interlacing filaments into a yarn with the filaments intermingled with adjacent ones of the filaments and groups of the filaments to maintain unity of the yarn by frictional constraint between the filaments at periodic nodes along the yarn. The invention also relates to methods of making fluid jet interlace apparatus.

Abstract: The present invention is directed to: a non-interlacing expirating yarn bulker comprising a body having an enclosed yarn passage extending therethrough. The yarn passage includes an inlet region, a throat region and an expanding region. A single pressurized fluid channel extends through the body and intersects with the yarn passage in the throat region. Cross sectional areas at certain defined locations in the yarn passage exhibit predetermined relationships. In addition, the inlet region and the pressurized fluid channel both are symmetrical about a common reference plane of symmetry;a replaceable wear member insertable into a body of a jet having a yarn passage with an inlet region and a throat region. The wear member has an upstream face, a downstream face, and a channel extending therebetween. The intersection of the channel and the downstream face of the member defines a wear edge.

Abstract: A jet for treating a yarn with a fluid has a flow control plate having a first and a second flow control opening. The flow control openings are located in the plate such that when the plate is mounted between the jet body and the manifold body, at least one, but preferably both, of the flow control openings in the plate at least partially overlap the inlet end of one (or both) of the fluid supply channels, thereby to modify the fluid flow area presented to the manifold by the fluid supply channel(s).

Abstract: A self-stringing jet device for fluid texturing of yarn has a yarn needle mounted in the jet body through which yarn passes to the outlet end of the jet. There is a high efficiency venturi located in the passage of the yarn needle to facilitate stringup.