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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 on an Inkle loom. The fundamental principle is to turn the tablets to lift selected sets of threads in the warp. The tablets may be turned in one direction continually as a pack, turned individually to create patterns, or turned some number of times "forward" and the same number "back".
On the left the warp beam, held from turning by with a weighted trough to keep the warp taut; on the right, the cloth beam (also called a breast beam on this type of loom), with a pawl and ratchet to allow the weaver to roll up the fell. In the center, devices for performing the motions of weaving.
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 ...
The three primary movements of a loom are shedding, picking, and beating-up. Shedding: The operation of dividing the warp into two lines, so that the shuttle can pass between these lines. There are two general kinds of sheds: "open" and "closed". Open Shed-The warp threads are moved when the pattern requires it-from one line to the other.
In basketweave, groups of warp and weft threads are interlaced so that they form a simple criss-cross pattern. Each group of weft threads crosses an equal number of warp threads by going over one group, then under the next, and so on. The next group of weft threads goes under the warp threads that its neighbor went over, and vice versa.
In plain weave cloth, the warp and weft threads cross at right angles, aligned so they form a simple criss-cross pattern. Each weft thread crosses the warp threads by going over one, then under the next, and so on. The next weft thread goes under the warp threads that its neighbor went over, and vice versa. [2]