Open shed

open shedIn 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.

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