Walton Monroe Mills Inc. 's Monroe (Ga. ) Plant installed five 168-rotor open-end spinning machines to supply filling yarn to the company's two weaving plants. A big advantage offered by the rotor machine production is delivery of 8-3/4-lb, knot-free filling packages to the looms, especially the company's new shuttleless machines. Even with frequent yarn changes, the plant achieves substantial savings in labor, quality and efficiency.