| 摘要 |
PCT No. PCT/AU95/00714 Sec. 371 Date Jul. 7, 1997 Sec. 102(e) Date Jul. 7, 1997 PCT Filed Oct. 26, 1995 PCT Pub. No. WO96/13626 PCT Pub. Date May 9, 1996The present invention provides an improved system of stitching for forming a casing of tubular netting, in which the casing comprises circumferential elastic members formed from at least one continuous spiral or a plurality of separate circular loops, and longitudinal members formed from a plurality of chain stitches interconnecting adjacent loops of the spiral or separate loops of the circumferential elastic members, resulting in a net-like appearance, the longitudinal chain stitches being attached to the circumferential elastic members such that, at each connection point of the chain stitching to an elastic member, a first chain stitch is attached to the elastic member and a further pair of chain stitches is attached to the elastic member and spaced either side of the first chain stitch such that, when the first and further pair of chain stitches are stretched, the first chain stitch is caused to pull on the section of the elastic member located between the further pair of chain stitches such that elastic deformation of the elastic member in the direction of the stretch occurs.
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