| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel seam structure attaining the improvement of seam strength and moderate expansibility, and effectively preventing unnecessary unseaming of a seam caused by thread breakage. SOLUTION: This seam structure is provided with a first double lock stitch part 40 formed by twining a first looper thread 4 around all of three thread loop strings 20, 20, 20 arranged at the lower face of a sewn material 1, and a second double lock stitch part 50 formed by twining a second looper thread 5 around two out of three thread loop strings 20, 20, 20. COPYRIGHT: (C)2005,JPO&NCIPI
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