| 摘要 |
A picking arm for an underbed thread trimmer which engages the bobbin thread and one limb of the needle thread and holds them so that a thread catching arm may engage the bobbin and needle threads and draw them into severing relation with a cutting edge of a thread cutting blade. After the threads have been cut, the picking arm returns to a rest position with the end of the bobbin thread retained in a channel contained in its thread engaging extremity. The bobbin thread is held in a position where it will be available for concatenation with a needle thread for the production of lockstitches.
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