Principle of Chain stitch formation

Principle of Chain Stitch Formation • Chain stitch is made by using one or more group of threads.. • The stitch which is formed by two or more group of threads is called multi thread

Principle of Chain Stitch

Formation

• Chain stitch is made by using one or more

group of threads.

• The stitch which is formed by two or more

group of threads is called multi thread

chain stitch.

• In this stitch, the loop of one group threads

is bounded by interlooping with loop of

another group of threads

Interlooping two types of threads to form chain stitch

Stitch type -401 is multithread chain stitch

and the

followings are the steps referred as the

principle

of stitch type-401 formation:

Step-1

• Needle is entered through the fabric with the

thread & reaches to it’s lowest position.

• Needle rises to form loop and looper starts

forward.

• A new loop is formed when needle moves upward a little

• Looper enters needle thread loop.

Fig : Step-1

• Needle rises and looper passes fully into loop New

loop is caught by the looper (above the needle eye below the old loop).

• Feed moves material to the next stitch position and

looper swings to other side of needle with avoiding motion.

• Needle descends through triangle.

• Interlacement is occurred under the fabric (between

the new loop & old loop).

• In that time fabric is also moved one stitch forward,

due to feed dog mechanism

Principle of Chain Stitch

Formation

Fig : Step-2

• The looper enlarges the new loop So that

the needle again entered through the

fabric, it passes through the loop.

• Needle continues rise and looper starts its

return stroke.

• The looper leaves the loop, which held on

the needle blade This loop now becomes the old loop

Principle of Chain Stitch

Formation

Fig : Step-3

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