| 摘要 |
The present invention provides an improved system of stitching for forming a casing of tubular netting, in which the casing comprises circumferential elastic members (11) formed from at least one continuous spiral or a plurality of separate circular loops, and longitudinal members formed from a plurality of chain stitches (10, 12) interconnecting adjacent loops of the spiral or separate loops of said circumferential elastic members (11), 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 (10) is attached to the elastic member (11) and a further pair of chain stitches (12) is attached to the elastic member (11) and spaced either side of said first chain stitch (10) such that, when said first and further pair of chain stitches are stretched, the first chain stitch (10) is caused to pull on the section of the elastic member (11) located between said further pair of chain stitches (12) such that elastic deformation of the elastic member (11) in the direction of said stretch occurs.
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