Forming mesh

Details Forming mesh Forming mesh

D - Textiles, Paper

21

F

D21F 1/10 (2006.01) D03D 11/00 (2006.01) D03D 13/00 (2006.01) D21F 7/08 (2006.01)

Patent

CA 2741604

This invention relates to a paper machine mesh, in particular forming mesh, with an upper and a lower fabric layer and with tie threads to join the two fabric layers, - whereby the lower fabric layer is formed by the tie threads, lower transverse threads and, woven therewith and extending transverse thereto, lower longitudinal threads, - whereby the lower fabric layer has a weaving pattern which is repeated in lower repeats, - whereby the tie threads are arranged in pairs and the tie threads of each pair are interchangingly woven with upper and with lower longitudinal threads, - whereby each tie thread pair is flanked on both sides respectively by one lower transverse thread and each of the two flanking lower transverse threads is woven in periodic sequence with lower longitudinal threads as follows: i) the flanking lower transverse thread continually crosses several directly consecutive lower longitudinal threads on the outer side of the lower fabric layer, ii) the flanking lower transverse thread continually crosses a lower longitudinal thread between the upper and the lower fabric layer and forms a thread knuckle. The invention is characterized in that within the lower repeat - each tie thread of each pair with lower longitudinal threads forms at least one tie segment and each tie segment is formed in that the respective tie thread of the pair continually crosses two or more directly consecutive lower longitudinal threads on the outer side of the lower fabric layer, and - the tie segments of each tie thread pair are arranged relative to the lower transverse threads flanking said segments such that i) the two flanking lower transverse threads continually cross on the outer side of the lower fabric layer at least the same lower longitudinal threads which together with the tie threads of the pair form the tie segments, ii) the one of the two flanking lower transverse threads forms respectively one knuckle with the lower longitudinal thread which directly precedes the corresponding tie segment, and iii) the other of the two flanking lower transverse threads forms respectively one knuckle with the lower longitudinal thread which directly follows the corresponding tie segment.

L'invention concerne une toile de machine à papier, en particulier une toile de formation, avec des couches de tissu inférieure et supérieure et avec des fils de liage destinés à relier les deux couches de tissu. L'invention est caractérisée en ce que, dans la partie inférieure, chaque fil de liage de chaque paire forme au moins un segment de liage avec les fils longitudinaux inférieurs et chaque segment de liage est ainsi formé, en ce que les différents fils de liage de la paire, sur le côté extérieur de la couche de tissu inférieure, croisent deux fils longitudinaux ou plus se succédant immédiatement, en ce que les segments de liage de chaque paire de fils de liage sont disposés par rapport aux fils transversaux inférieurs qui les bordent de manière que i) les deux fils transversaux inférieurs qui les bordent, sur la face extérieure de la couche de tissu inférieure, croisent au moins les mêmes fils longitudinaux inférieurs qui forment les segments de liage avec les fils de liage de la paire et ii) un des deux fils transversaux inférieurs qui les bordent forme avec le fil longitudinal inférieur un coude qui précède directement le segment de liage et iii) lautre des deux fils transversaux inférieurs qui les bordent forme avec le fil longitudinal inférieur un coude qui suit directement le segment de liage.

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