Southeast University department of Textile Engineering. Any mistake please forgive me.

1. PRESENTATION TITLE
Seam Class
Slide Prepared BY: Faisal Ahmed
Southeast University

2. What is a Seam?
A stitch line where fabrics are joined together by various fabric arrangements is called
a seam.
Different types of seams in sewing:
Seam class-1: Super imposed seam
Seam class-2: Lapped seam
Seam class-3: Bound seam
Seam class-4: Flat seam
Seam class-5: Decorative seam
Seam class-6: Edge neatening
Seam class-7 (Attaching of separate items)
Seam class-8 (Single ply construction)

3. Seam class-1: Super
imposed seam Seam is achieved by two or more separate pieces of fabric sewing together
 The fabric ends are in same direction.
 This class seam can be sewn a variety of machine. E.g: Lock stitch or overlock
m/c.
 Used to create neat load bearing seams for lingerie, shirts, etc.

4. Seam class-2:
Lapped seam
 This type of seam is achieved with two or more pieces of
fabric over lapping each other.
 Tow sewn ends of the fabric are in opposite direction.
 Mostly two needle chain stitch machine is used.
 Seam under this class is very strong
Uses: Inside seam of jeans and dress shirts, rain wear etc

5. Seam class-3: Bound
seam A bound seam is one piece of fabric encompassing
the raw edge of another piece of fabric.
 Some time used as decorative purpose.
 Mostly used for knit fabric than woven fabric.
 The binder fabric may be of different colors.
Uses: Neckline of a t-shirt, Yoke joint in the shirt waist
band, under wire.

6. Seam class-4: Flat
seam Two or more fabric ends are joined
without overlapping
 Seam thickness is comparatively less.
 Zig-zag stitch may be produced.
 Edge should be cleaned before sewing to
avoid trying.
Uses: Intensively used in under garments in
knit wear.

7. Seam class-5: Decorative seam
 This type of seam is made by making one or more
adjacent stitch lines in one or more layer of fabric.
 Multi-needle sewing machine is used.
 This type of seam is called decorative stitching.
 This seam is produced and used to increase the
beauty or decorative value of fabrics.
Uses: Used in pant or other dresses.

8. Seam class-6: Edge
neatening
 This type seam is used to bind the edge of
fabric, so that thread cannot be drawn off.
 Various stitches are used in this type of seam.
 It can be made by over lock machine.
 If folder is used, the seam can be made easily.
Uses: Mostly used knitted garments and
hemmings.

9. Seam class-7 (Attaching of
separate items)
 Similar to lapped seam (Seam Class-2),
but the joined component is extended
limited on both sides from sewn line.
 This is used for joining of different parts of
garments with additional .
 Multi needle sewing machine and folder is
used to produce this seam. It will be easier
this function is involved.
 Uses: Extra materials such as lace, elastic
braid, elastic etc.

10. Seam class-8 (Single ply
construction)
 Mainly one piece of fabric used.
 This class is commonly used for waist belt
and loop belt.
 The edges of fabric are sewn by folding in
various ways.
 Seam is made in one time completed by
twin needle machine and folder
 Uses: Mainly used waist Belts and Belts
loop