US 11,946,180 B2
Needling machine or needling line with multi-needle boards
Frédéric Demange, Elbeuf (FR); and Pierre-Emmanuel Labaume, Elbeuf (FR)
Assigned to Andritz Asselin-Thibeau, Elbeauf (FR)
Appl. No. 17/602,094
Filed by ANDRITZ ASSELIN-THIBEAU, Elbeuf (FR)
PCT Filed Mar. 26, 2020, PCT No. PCT/EP2020/058599
§ 371(c)(1), (2) Date Oct. 7, 2021,
PCT Pub. No. WO2020/212113, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 19 04119 (FR), filed on Apr. 17, 2019.
Prior Publication US 2022/0145504 A1, May 12, 2022
Int. Cl. D04H 18/02 (2012.01)
CPC D04H 18/02 (2013.01) 7 Claims
OG exemplary drawing
 
1. Needling machine intended to consolidate a web of fibres, comprising a series of needle-field boards, each needle-field board having a least one respective needle field projecting from a needle face of the needle-field board, the web of fibres being movable in front of the at least one respective needle of the series of needle-field boards, and needles of the at least one respective needle field being movable back and forth in a direction transverse to the movement of the web, so that the needles traverse the web of fibres in one direction, then in the other, wherein the series of needle-field boards comprise a first board including a first needle field and a second board including a second needle field, the first needle field being arranged on the needle face of the first board according to a first needle face pattern and the second needle field being arranged on the needle face of the second board according to a second needle face pattern, characterised in that the first needle face pattern is such that it cannot be superimposed on its image by a rotation of 180° with respect to an axis parallel to the direction of the needles and/or the movement of the needles, and the second needle face pattern is identical to the first needle fact face pattern rotated by 180° with respect to an axis parallel to the direction of the needles and/or the movement of the needles.