By 1400, the draw loom was widely used. The Draw Loom is a very large and complicated loom.
The early Draw Looms required 2 people, the weaver and the draw boy, to operate them. The draw boy sits on top of the loom. Under the direction of the weaver he raises and lowers individual heddles attached to each pattern warp thread.
This method of weaving produces cloth with very intricate patterns.
[SB] {MW}