Patent ID: 11946180
Assignee: ANDRITZ ASSELIN-THIBEAU
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 0:
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.