Reduced-bulk, enhanced-resilience, lower-drag netting

D - Textiles – Paper – 04 – G

Patent

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Details

D04G 1/00 (2006.01) A01K 73/045 (2006.01) A01K 75/00 (2006.01) D03D 9/00 (2006.01) D03D 19/00 (2006.01)

Patent

CA 2447483

Netting (15) includes mesh bars (26) made from twines (11,13) which possess physical properties that vary, change or alternate along a series of collinear mesh bars (26). The non-homogeneous media obtained by arranging in this way mesh bars (26) having varying physical properties may be configured to dampen or attenuate vibrations in the netting (15) such as harmonic oscillations (resonance). Furthermore, twines (11, 13) that attenuate vibrations may be chosen that also reduce the amount of material required to make netting (15) which has strength similar to or greater than conventional machine-made netting (15). Due to reduced vibration, the improved netting (15) lasts longer than conventional machine-made netting (15), and reduces the possibility of injury to fish which escape through a trawl's mesh cell openings.

L'invention concerne des filets de pêche (15) comprenant des barres de mailles (26) fabriquées à partir de ficelles (11,13). Ces ficelles ont des propriétés physiques qui varient, changent ou alternent le long d'une série de barres de mailles colinéaires (26). Le systeme non homogène obtenu par un tel agencement des barres de mailles (26) ayant des propriétés physiques variables peut être configuré pour amortir ou atténuer les vibrations dans le filet (15), telles que des oscillations harmoniques (résonance). En outre, on peut choisir des ficelles (11, 13) qui atténuent des vibrations et qui permettent également de reduire la quantité de matière requise pour fabriquer un filet (15) ayant une résistance similaire ou supérieure à celle d'un filet (15) classique fait à la machine. En raison des vibrations réduites, le filet (15) amélioré dure plus longtemps qu'un filet (15) conventionnel fait à la machine, et réduit les risques de blessure des poissons qui s'échappent à travers les ouvertures des mailles d'un chalut.

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