发明名称 |
METHOD FOR PREVENTING SEAM RAVEL OF MULTI-THREAD CHAIN STITCHES, SEAM RAVEL PREVENTING APPARATUS FOR MULTI-THREAD CHAIN STITCH SEWING MACHINE, AND MULTI-THREAD CHAIN STITCH SEAM STRUCTURE |
摘要 |
A method for preventing seam ravel of multi-thread chain stitches is provided. After normal sewing is terminated with a looper set in a forward movement state, a state in which a needle thread loop caught by the looper is subjected to position-holding at a position closer to a forward movement end of the looper than a descent position of a needle is maintained until the needle descends through the needle thread loop caught by the looper. Thereafter, the position-holding of the needle thread loop is released to permit a sewing action for at least one stitch, thereby allowing the needle thread loop to be self-looped with a needle thread held by the needle. This surely strongly prevents the seam ravel of multi-thread chain stitches formed by the single needle, irrespective of the dimension of tension applied to the needle thread and the looper thread. |
申请公布号 |
EP2756122(A1) |
申请公布日期 |
2014.07.23 |
申请号 |
EP20120831527 |
申请日期 |
2012.09.05 |
申请人 |
YAMATO SEWING MACHINE MFG. CO., LTD. |
发明人 |
HASHIMOTO, SEIJI |
分类号 |
D05B1/10;D05B1/12;D05B65/02;D05B65/06 |
主分类号 |
D05B1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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