Semi open shed

This is formed under both open & closed principles. Here a stationary bottom line is refined. The top line is movable one after inserting a pick, the top lines moves threads towards the bottom line.

Merits:

1. Strain upon warp is low.
2. Required minimum time of shed.
3. Loom can run at high speed.
4. It is suitable for fancy & compact fabric.
5. More production.
6. Less power consumption.

Demerits:

1. Strain on yarn is not equally distributed.
2. Difficult to find breakage yarn.
3. Leveling the healds is difficult.

Uses:

1. Double lift jacquard.
2. Double lift dobby.