US 12,392,056 B2
Counter-flow washing
Johann Pillichshammer, Frankenmarkt (AT); Christoph Schrempf, Bad Schallerbach (AT); Andreas Gressenbauer, Schörfling am Attersee (AT); Ernst Reiter, Schörfling (AT); and Martin Neunteufel, Lantau Island (CN)
Assigned to Lenzing Aktiengesellschaft, Lenzing (AT)
Appl. No. 17/779,916
Filed by LENZING AKTIENGESELLSCHAFT, Lenzing (AT)
PCT Filed Nov. 26, 2020, PCT No. PCT/EP2020/083490
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/105275, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 19211398 (EP), filed on Nov. 26, 2019.
Prior Publication US 2023/0010634 A1, Jan. 12, 2023
Int. Cl. D01D 10/06 (2006.01); D01F 2/00 (2006.01); D06B 1/04 (2006.01); D06B 1/14 (2006.01); D06B 9/06 (2006.01); D06B 15/00 (2006.01); D06B 15/08 (2006.01); D06B 15/10 (2006.01); D06B 21/00 (2006.01)
CPC D01D 10/06 (2013.01) [D01F 2/00 (2013.01); D06B 1/04 (2013.01); D06B 1/14 (2013.01); D06B 9/06 (2013.01); D06B 21/00 (2013.01); D06B 15/005 (2013.01); D06B 15/08 (2013.01); D06B 15/10 (2013.01); D06B 2700/36 (2013.01); D10B 2201/22 (2013.01)] 14 Claims
OG exemplary drawing
 
9. A system for washing a filament, the system comprising at least two washing stages, and in each washing stage the filament is brought into contact with a fresh washing liquid by a washing element in such a way that only an amount of a washing liquid is transferred to the filament, which adheres to the filament itself, and, in each washing stage, the washing liquid is then separated from the filament again and a separated washing liquid is collected in such a way that it is not mixed with the separated washing liquid from other washing stages of the system but is used as the fresh washing liquid in the washing element of a preceding washing stage, wherein the washing element is selected from elements for providing a falling film of washing liquid, rollers or rolls, preparation yarn guides, and a combination of ram jet washers and yarn guides, the washing element transferring only an amount of the washing liquid to the filament that adheres to the filament.