Page 235 - CTS - Sewing Technology - TP - Volume - 2-0

SEWING TECHNOLOGY - CITS

Blind stitch looper
• It catches the loop form by needle thread and help in forming stitch.
• It is situated above the bed of the machine

Ridge forming regulator
• To obtain desired depth of felling stitch
Threading
• A total of 12 thread guides.
• Thread tension should be as weak as possible without loosing good balance of sewing. (Fig 3)

Fig 3

Looper

Regulator

Threading

Motion of
Feed dog:

Working principle
The stitch produced by this machine in the fabric is not shown from face side and so this is called blind stitch
machine. Usually curved needle is used in this machine as it can penetrate in the fabric partially. The needle
comes out from the side of the fabric through which it penetrated. Again in maximum blind stitch machine optional
skip device is attested by which it is possible to penetrate the outside layer after one or two stitch. The speed of
this type of machine is up to 2500 SPM and the stitch length can be 3 to 8 mm long. Usually one thread is used
to make the stitch but two threads may also be used. In case of two threads blind stitch, it is safe from opening.
Mainly for attaching hemming or facing this machine is used. (Fig 4)

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CITS : Apparel - Sewing Technology - Exercise 36