Apparent twist yarn system and apparatus and method for producing same
AssigneePrisma Fibers, Inc.
InventorsArnold L. Belcher, Jr., Lawrence E. Rasnick, Jr.
Life of this patent
Estimating the term…
Abstract
A process for combining singles yarns, of different colors or dyeabilities, to form an apparent twist yarn. The process includes the sequential steps of individually and simultaneously drawing and texturing a plurality of singles yarns; converging the drawn and textured singles yarns through an air jet entangler that simultaneously entangles and tensions the yarn bundle; twisting the singles yarns in the yarn bundle about each other in alternate, or otherwise patterned, S and Z directions.
Claims29
A process for the manufacture of apparent twist yarn comprising the steps of:
- a) separately and simultaneously drawing a plurality of polymeric continuous filament singles yarns, at least one of which is of a different color or different dyeability to the others,
- b) crimping each of said plurality of drawn singles yarns,
- c) separately and simultaneously air-jet entangling said plurality of drawn and crimped singles yarns,
- d) converging said plurality of drawn, crimped and entangled singles yarns and conveying the thus formed unmixed yarn bundle through an air-jet entangler so constructed and arranged to, and so controlled to, intermittently entangle the singles yarns of the yarn bundle and simultaneously impart a retarding force on the yarn bundle tending to increase the tension on the yarn bundle,
- e) passing said yarn bundle through a twist jet assembly having first and second twisting air jets whose directions of air flow are each set to impinge tangentially on said yarn bundle in such a manner as to twist the component singles yarns of said yarn bundle about each other in alternate, or otherwise patterned, S and Z directions;
- and
- f) conveying the thus produced apparent twist yarn to a wind-up device.
An apparent twist yarn manufactured by a process comprising the steps of:
- a) separately and simultaneously drawing a plurality of polymeric continuous filament singles yarns, at least one of which is of a different color or different dyeability to the others,
- b) crimping each of said plurality of drawn singles yarns,
- c) separately and simultaneously air-jet entangling said plurality of drawn and crimped singles yarns,
- d) converging said plurality of drawn, crimped and entangled singles yarns and conveying the thus formed unmixed yarn bundle through an air-jet entangler so constructed and arranged to, and so controlled to, intermittently entangle the singles yarns of the yarn bundle and simultaneously impart a retarding force on the yarn bundle tending to increase the tension on the yarn bundle in its traverse path,
- e) passing said yarn bundle through a twist jet assembly having first and second twisting air jets whose directions of air flow are each set to impinge tangentially on said yarn bundle in such a manner as to twist the component singles yarns of said yarn bundle about each other in alternate, or otherwise patterned, S and Z directions to thereby produce an apparent twist yarn comprising alternate, or otherwise patterned, sections of S and Z twisted yarn interspersed with sections of non-twisted entangled filaments;
- and
- f) conveying the thus produced apparent twist yarn to a wind-up device.
Apparatus for making apparent twist yarn from a plurality of polymeric continuous filament singles yarns, at least one of which is of a different color or different dyeability to the others, comprising, in a single production line separate from a yarn spinning apparatus,
- a drawing device for drawing a plurality of yarns at a predetermined draw ratio;
- a texturing device for individually and simultaneously texturing the plurality of yarns to obtain a plurality of textured yarns;
- a first set of entanglers for individually and simultaneously entangling the plurality of textured yarns;
- a second stage entangler for entangling the plurality of textured yarns to produce a yarn bundle and simultaneously imparting a retarding force on the said yarn bundle tending to increase the tension on the yarn bundle;
- a twist jet assembly having first and second twisting air jets whose directions of air flow are each set to impinge tangentially on said yarn bundle in such a manner as to twist the component singles yarns of said yarn bundle about each other in alternate, or otherwise patterned, S and Z directions;
- a programmable controller operably connected to said twist jet assembly and being so constructed and arranged to individually control the timing and degree of air flow to said first and second twisting air jets;
- and
- a wind-up device.
Dependencies are inferred from the claim text.