In weaving, the shed is the temporary separation between upper and lower warp yarns through which the weft is woven.
Most types of looms have some sort of device which separates some of the warp threads from the others.
These steps are then repeated, with a different set of threads being raised so as to interlace the warp and weft.
[3] The shed-rod was an invention of eastern origin, and was introduced to Europe via Egypt in the first century AD.
The second method lessened the effort of lifting the selected harnesses because they no longer needed to be raised as high as in a rising shed loom.
There are many things that can cause the warp threads not to separate cleanly, and thus produce a poor shed.
[5] The weaver can also insert a stick into the shed to clear it, and make way for the shuttle though this option is time-consuming.