Stitch Type

Stitches: Class-500 (Overedge Stitch)

Class-500 (overedge stitch): The stitches under this class are produced with one or more threads (one needle thread and two or more looper thread) and at least threads of one group around the edge of the fabric to stop fraying (i.e. threads from the edge of the fabric can not come out). The knife of the machine cuts the edge first producing a clear edge for seaming. Sometimes it is used for decorative purpose.

 May also be called serging, overlock, overseam, overcast, Merrow (type of machine)  These are formed over the edge of fabric, encasing the edge in thread inter looping  A finish for raw edge of fabric to prevent fabric from raveling  Widely used in the apparel industry

Applications: •

Edge neatening of knitted fabrics

• Where extensibility of stitches is important (i.e. Polo tees, sports and dance garments)

Advantages: •

Most extensible (able to be extended) stitches because of their many inter looping • Require narrow seam allowances, conserving fabric • Reduced labor cost of finishing seams

Disadvantages: •

This stitch type is prone to seam grinning (the threads are exposed when the seam is pulled at right angles to the line sewn). • The finish may be somewhat bulky due to the complexity of the seam construction • Stitch width is about 3-5 mm • Require more thread than most overstitch types • Thread can unravel if caught and broken on sharp object