| 242 / | HD | WINDING, TENSIONING, OR GUIDING |
| 520 | DF | CONVOLUTE WINDING OF MATERIAL {17} |
| 540 | DF | .~ With particular drive {5} |
| 541 | DF | .~.~ Driver engages coil periphery {7} |
| 541.4 | DF | .~.~.~ With drive pressure regulator (e.g., nip pressure control) {2} |
| 541.5 | ![]() | .~.~.~.~ Coil engaging pressure element {1} |
| 541.6 | DF | .~.~.~.~.~> Fluid actuator |