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The warp-weighted loom is a simple and ancient form of loom in which the warp yarns hang freely from a bar, which is supported by upright poles which can be placed at a convenient slant against a wall. Bundles of warp threads are tied to hanging weights called loom weights which keep the threads taut. [1]
Tablet weaving dates back at least to the 8th century BCE in early Iron Age Europe [1] where it is found in areas employing the warp-weighted loom. [2] Historically the technique served several purposes: to create starting and/or selvedge bands for larger textiles such as those produced on the warp-weighted loom; to weave decorative bands onto ...
The threading of a Jacquard machine is so labor-intensive that many looms are threaded only once. Subsequent warps are then tied into the existing warp with the help of a knotting robot which ties on each new thread individually. Even for a small loom with only a few thousand warp ends, the process of re-threading can take days.
The shed of a jack loom is smaller for a given length of warp being pulled aside by the heddles (loom depth). The warp threads being pulled up by the jacks are also tauter than the other warp threads (unlike a counter balance loom, where the threads are pulled an equal amount in opposite directions). Uneven tension makes weaving evenly harder.
A backstrap loom with a shed-rod. Originally there was no shed, and the weft was inserted into the warp by picking the warp threads up individually, as is done in tapestry weaving. After each weft thread is woven the warp threads had to be picked out and lifted again, which made the process slow.
The vertical warp yarns are held stationary in tension on a loom (frame) while the horizontal weft (also called the woof) is drawn through (inserted over and under) the warp thread. [1] In the terminology of weaving, each warp thread is called a warp end ; a pick is a single weft thread that crosses the warp thread (synonymous terms are fill ...
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Balanced plain weaves are fabrics in which the warp and weft are made of threads of the same weight (size) and the same number of ends per inch as picks per inch. [3] Basketweave is a variation of plain weave in which two or more threads are bundled and then woven as one in the warp or weft, or both.