Stitches flat seam

The most common seams used are superimposed seams on two plies of fabric using a 514, four-thread overlocking stitch. Also, flat seams are used where two plies of fabric are butted... 

The most comphcated stitch type in this class is type 606, known as flat lock, which can be used to join fabrics that are butted together in what used to be called a flat seam. Type 606 is used on knitted fabrics, especially underwear fabrics. 

The flat-seaming stitch type 607 with nine threads (four needle threads, four looper threads and one top-covering thread) is used for trims and seams simultaneously, producing the flat, butted seams as on infant panties, men s briefs and other knitted garments (Figure 10.20). 

Cover-seam chain stitches are used in binding operations in knitted undergarments, athletic shirts and infant wear. These stitches are very strong, and elastic, which are used extensively by manufacturers of knit garments to cover raw edges and prevent raveling. They may be used for attaching flat knit or ribbed knit collars. 

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