| 摘要 |
<p>A composite rotary loop taker (10) which includes a loop seizing point (30) mounted on a substantially annular frame (12), for use in a lock-stitch sewing machine. The loop seizing point forms a smoothly curved junction with the leading edge of a crosswise member (14) between the opposite sides of a rotatably mounted substantially annular frame, said smoothly curved junction adapted to receive a thread loop and expand the loop over a stationary bobbin basket to form a lock stitch. Preferably, the loop seizing point, downwardly extending lug (36) toward the smoothly curved junction and an inwardly extending foot therefrom are metal, together with a crosswise reinforcing member (70) and a partially circumferential supporting wall (66) on the opposite side of the annular frame. The remaining elements of the annular frame are plastic which may have dispersions of substantially oriented fibers, glass fibers or lubricating fibers, and the frame is restrained from radial expansion and creep by a metal retaining means consisting of a ring (160) substantially around the outer wall of the annular frame.</p> |
