Sewing machine lower thread end monitor - has light reflecting surface on looper housing side towards bobbin housing to prevent soiling
The thread monitor at a sewing machine, to detect the end of the lower thread, has at least one opening at the base of the lower section of the bobbin housing, which is larger than the drillings in the bobbin flanges, aligned with a recess in the upper section of the bobbin housing. The reflection s...
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