In weaving, the shed is the temporary separation between upper and lower warp yarns through which the weft is woven. The shed is created to make it easy to interlace the weft into the warp and thus create woven fabric. Most types of looms have some sort of device which separates some of the warp threads from the others. This separation is called the shed, and allows for a shuttle carrying the weft thread to move through the shed perpendicular to the warp threads. Which threads are raised and which are lowered are changed after each pass of the shuttle.
The process of weaving can be simplified to a series of four steps: the shed is raised, the shuttle is passed through, the shed is closed, and the weft thread is beaten into place. These steps are then repeated, with a different set of threads being raised so as to interlace the warp and weft.
The term shedding refers to the action of creating a shed. A shedding device is the device used to raise or open the shed. Creating the separation is referred to as raising or opening the shed, while the reverse is known as lowering or closing the shed.
Other articles related to "shed, sheds":
... the warp threads not to separate cleanly, and thus produce a poor shed ... of friction on the first foot or so of the warp where the threads were handled all cause poor sheds ... yarns like mohair can also cause a poor shed ...
Famous quotes containing the word shed:
“Wandering between two worlds, one dead,
The other powerless to be born,
With nowhere yet to rest my head,
Like these, on earth I wait forlorn.
Their faith, my tears, the world deride
I come to shed them at their side.”
—Matthew Arnold (18221888)