US 12,234,580 B2
Yarn, method and apparatus for producing yarn and products formed therefrom
Andrew George Wynne, Levin (NZ)
Assigned to TMC LIMITED, Auckland (NZ)
Filed by TMC Limited, Auckland (NZ)
Filed on Dec. 26, 2023, as Appl. No. 18/396,304.
Application 18/396,304 is a division of application No. 17/425,795, granted, now 11,898,277, previously published as PCT/NZ2020/050003, filed on Jan. 30, 2020.
Claims priority of application No. 750303 (NZ), filed on Jan. 30, 2019; and application No. 756477 (NZ), filed on Aug. 27, 2019.
Prior Publication US 2024/0125012 A1, Apr. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. D02G 3/36 (2006.01); D02G 3/04 (2006.01); D02G 3/28 (2006.01)
CPC D02G 3/36 (2013.01) [D02G 3/04 (2013.01); D02G 3/286 (2013.01); D10B 2211/02 (2013.01); D10B 2331/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of producing a worsted or semi-worsted yarn of linear density less than 80 tex, including:
forming two or more twisted strands, each strand being formed by passing an outer material and a continuous core through a reciprocating twisting stage such that each strand has areas of twist separated by areas of non-twist, wherein the outer material includes coarse wool fibers having an average fiber diameter greater than 26 microns; and
bringing the strands together to form the yarn by self-twisting of the strands with each other.