242 / | HD | WINDING, TENSIONING, OR GUIDING |
470 | DF | HELICAL OR RANDOM WINDING OF MATERIAL {17} |
476.7 | DF | .~ Distributing material along the package {24} |
480.4 | DF | .~.~ Progressive variation of guide stroke length (e.g., at least one end of package tapered) {3} |
480.7 | .~.~.~ On double-headed spool |