242 / | HD | WINDING, TENSIONING, OR GUIDING |
520 | DF | CONVOLUTE WINDING OF MATERIAL {17} |
538 | .~ With coiled supply {3} | |
538.1 | DF | .~.~> Coordinated drive of supply and take-up coils |
538.2 | DF | .~.~> With intermediate access station {1} |
538.4 | DF | .~.~> Light occludent construction (e.g., light sensitive film holder) |