Automatic chain-stitch sewing machine

摘要

An automatic chain-stitch sewing machine comprising, a sewing needle, a work holder for retaining a work piece during sewing, and a rotary hook having a hook point for capturing a needle thread loop and drawing the loop through a previous thread loop. The machine has means for spreading the limbs of the previous thread loop, and memory means having a plurality of instructions containing at least directional information designating the direction of movement of the work holder along separate coordinate directions in a plane relative the needle. The machine has means for reading the instructions and for forming electrical signals representing the instructions. The machine also has driving means responsive to the signals for moving the work holder in said plane relative the needle to form a pattern of chain-stitches in the work piece.