IPC 2013 : D06B 5/06 : through yarns, threads, or filaments.

IPC2013 > D > D06 > D06B > D06B 5/00 > D06B 5/06[2] > through yarns, threads, or filaments.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D SECTION D — TEXTILES; PAPER.
D06 TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR.
D06B TREATING TEXTILE MATERIALS BY LIQUIDS, GASES, OR VAPOURS (applying liquids to surfaces in general B05; conveying in general, handling webs or filaments in general B65; treating leather C14C; mechanical removal of impurities from animal fibres D01B; laundering D06F; chemical matters, see D06L - D06Q).
D06B 5/00 Forcing liquids, gases, or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating (mercerising D06B 7/00; solvent-treatment D06B 9/00; treatment of selected parts of textile materials D06B 11/00; with aid of vibration D06B 13/00).
D06B 5/06 · · through yarns, threads, or filaments.