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Automatic Bobbin-Thread Winding and Feeding Device
The automatic bobbin-thread winding and feeding device (AW-3) which is suited to the sewing of large articles such as car seats are optionally available. In the case of sewing large articles, etc, a large quantity of bobbin thread is consumed during the sewing of one article. This means that the replacement of bobbin frequently occurs. Since the AW-3 changes the bobbin automatically before the bobbin-thread runs out and bobbin-thread is wound during sewing, the operator is able to concentrate on sewing without worrying about a shortage of bobbin thread. In addition, only two bobbin cases are required for sewing. As a result, burdensome control of bobbin thread tension and bobbin-changing work are no longer required, thereby contributing to increased productivity.