Double-lapped seams

Double-lapped seams consist of two or more plies of fabric that are lapped together and secured with one or more rows of stitching. One of the most common seams is the double-lap felled seam with two or more rows of stitching. This provides a strong seam with fabric edge protection. This seam is often used on the side seam of judo... 

Seam types used for woven fabrics include superimposed seams and double-lapped seams, especially when a high degree of strength is required, for example, in judo suits. Hemmed seams are also used on legs, and a lockstitch is used on areas that include labels and pockets. Sewing threads would be mainly staple core-spun polyester. Round-point needles are used for stitching these materials. 

Garments made of coated fabrics are used in outdoor sporting activities and would include the construction methods of superimposed, double-lapped and bound seams. Also, welded methods might be employed on highly synthetic fabrics with more than a 60% synthetic blend. Acute needle points are used to pierce the fabric making a small needle hole that... 

Double-lapped felling seam system as double or triple seam 7. Multiple lock stitch seams for special tasks... 

Multipiece built-up containers rely on a variety of seams lap, butt, locked, single and double seaming. 

Three-piece aerosol cans are constructed by seaming a cone onto the body of a twopiece built-up tinplate can. The can itself is constructed in a similar way to an open top can but with a strengthened locked and lapped side seam so that it will withstand internal pressure. The base of the container is domed upwards for the same reason and is invariably compound-lined and double seamed onto the side wall. 

Double lock stitch 2. Lap lock stitch seams... 

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