| 400 / | HD | TYPEWRITING MACHINES |
| 191 | DF | INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15} |
| 223 | DF | .~ Ribbon-feeding mechanism {13} |
| 236 | DF | .~.~ Drive applied directly to spool or spool spindle {2} |
| 236.2 | ![]() | .~.~.~ By a gear driving a gear on the spool or spindle |