Bobbin holder assembly for double needle type over-lock sewing machine, has nails in right and left bobbin holders, to trap needle thread loop in right side of corresponding needles, by rotating holders

摘要

The nails (14a,13a) of respective right and left bobbin holders (14,13), trap the needle thread loop in right side of corresponding needles (12,11), by rotating in clockwise and anti-clockwise directions, respectively. The recesses (12a,11a) of both needles, are arranged in right side. The left nail has a notch to allow left needle to pass through it.