Meltzer of Queens College and The Graduate Center of the City University of New York has no relevant financial relationships to disclose.) Jamie T Twaite MA (Ms. Twaite of Queens College and The Graduate Center of the City University of New York has no relevant financial relationships to disclose.) William H Krause PhD (Dr. Krause of Queens College of the City University of New York has no relevant financial relationships to disclose.)
There are actually several different types of loop stitches, and they all work a little differently. Chain Stitch The simplest loop stitch is the chain stitch. To sew a chain stitch, the sewing machine loops a single length of thread back on itself.
Most modern sewing machines have this function built in, but many older machines do not, and straight stitch machines cannot sew a zigzag stitch with which buttonholes are constructed. A buttonholer attachment can create buttonholes from any sewing machine capable of making a lock stitch.