For stitching around the edges of an opening, such as a buttonhole.
(1) Note. For making the buttonhole-stitch, see this class, subclass 157.
SEE OR SEARCH THIS CLASS, SUBCLASS:
264.1, for methods of making buttonholes and eyelets.
446+, for zigzag stitch forming mechanism wherein the needle is shifted back and forth across the line of material feed, which mechanism includes particular structure for sewing a pattern which encloses a portion of the material within
boundaries formed by the pattern (e.g., buttonholes).
