| 1/00 | Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) |
| 1/02 | Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) Preparation of spinning solutions |
| 1/04 | Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) Melting filament-forming substances |
| 1/06 | Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) Feeding liquid to the spinning head (constructions of pumps F04) |
| 1/09 | Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) Feeding liquid to the spinning head (constructions of pumps F04) Pressure, temperature or feeding rate regulation |
| 1/10 | Treatment of filament-forming or like material (working of plastics or substances in a plastic state, in general B29) Filtering or de-aerating the spinning solution or melt |
| 4/00 | Spinnerette packs; Cleaning thereof (D01D 5/24, D01D 5/253, D01D 5/28 take precedence) |
| 4/02 | Spinnerette packs; Cleaning thereof (D01D 5/24, D01D 5/253, D01D 5/28 take precedence) Spinnerettes (alloys therefor C22C) |
| 4/04 | Spinnerette packs; Cleaning thereof (D01D 5/24, D01D 5/253, D01D 5/28 take precedence) Cleaning spinnerettes or other parts of the spinnerette packs (cleaning in general B08B) |
| 4/06 | Spinnerette packs; Cleaning thereof (D01D 5/24, D01D 5/253, D01D 5/28 take precedence) Distributing spinning solution or melt to spinning nozzles |
| 4/08 | Spinnerette packs; Cleaning thereof (D01D 5/24, D01D 5/253, D01D 5/28 take precedence) Supporting spinnerettes or other parts of spinnerette packs |
| 5/00 | Formation of filaments, threads, or the like |
| 5/02 | Formation of filaments, threads, or the like Starting the formation |
| 5/04 | Formation of filaments, threads, or the like Dry spinning methods |
| 5/06 | Formation of filaments, threads, or the like Wet spinning methods |
| 5/08 | Formation of filaments, threads, or the like Melt-spinning methods |
| 5/084 | Formation of filaments, threads, or the like Melt-spinning methods Heating filaments, threads or the like, leaving the spinnerettes |
| 5/088 | Formation of filaments, threads, or the like Melt-spinning methods Cooling filaments, threads or the like, leaving the spinnerettes |
| 5/092 | Formation of filaments, threads, or the like Melt-spinning methods Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys |
| 5/096 | Formation of filaments, threads, or the like Melt-spinning methods Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes |