A sewing machine and a threading method

Details A sewing machine and a threading method A sewing machine and a threading method

D - Textiles, Paper

05

B

D05B 87/00 (2006.01)

Patent

CA 2080669

Upper and lower loopers 2 and 3 are formed of annular loopers. A pump 4 for supplying pressurized air is connected to thread introduction portions 7, which are connected to thread inlets of the loopers through, annular conduits 5 and 6 and conduits 5' and 6'. the conduits 5' and 6' are slidable relatively to the conduits 5 and 6, and are connected to thread inlets of the loopers in the threading operation. In this state, the pressurized air is supplied from the pump 4 to the thread introduction portion 7, whereby the thread is transferred by the flow of the air and is fed to an outlet of the annular looper. A connecting portion moving plate 10 for connecting the conduits 5' and 6' is positioned in a disengagement position during the operation of the sewing machine by a stopper 18 and is positioned in an engagement position during a threading operation.

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