warp beam

noun

a roller, located at the back of a loom, on which the warp ends are wound in preparation for weaving.

Origin of warp beam

First recorded in 1825–35

The threads of the warp extend in parallel order from the warp-beam to the front of the loom, and are attached to the cloth-roll.
Textiles | William H. Dooley
The yarn-beam or yarn-roll or warp-beam was ever a very important part of the loom.
Home Life in Colonial Days | Alice Morse Earle
The warp is attached to the warp beam C on top and the breast beam D at the bottom.
Ancient Egyptian and Greek Looms | H. Ling Roth
From the warping-bars these bouts are carefully wound on the warp-beam.
Home Life in Colonial Days | Alice Morse Earle
The warp-beam is a wooden cylinder back of the loom on which the warp is wound.
Textiles | William H. Dooley

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