The History of Generative Art
After 1836 in the Unites States, three different looms produced “figured and fancy” coverlets; the drawloom, the barrel loom, and the Jacquard attachment. The fundamental difference in these systems was the way in which the warp cords were raised in order to form a shed. The shed is formed by separating the warp yarns into two layers to form a tunnel for the weaver to through the shuttle through and create the weft or woven part of the fabric. See figure 1. When using the drawloom, the drawgirl/boy manually chooses the cords to raise. The barrel loom uses a cylinder with pegs to raise the warp ends and create the pattern. In the Jacquard attachment, punched cards activate the threads or cords raised to form the shed.