Open shed

In this type of shed, the warp threads from two stationary lines, one at the top & other at the bottom. After inserting a pick, change are made by carrying threads from one fixed line to another. So some threads are lowered from the top line & some are raised from the bottom line during the change raising & lowering of the threads occurred simultaneously.

Merits:

1. The warp lines are less liable to rubbing.
2. Less power consumption.
3. It is suitable for basic fabric.
4. The loom can run at a fastest speed.
5. More production.
6. Wear & tear of the loom parts is low.

Demerits:

1. Broken ends cannot be easily inserted into the harness.
2. The tension of the yarn is not the same in different stages of shedding.
3. High breakage rate.

Uses:

1. Ordinary tappet loom.
2. Jacquard loom.