IPC 2013 : D01G 7/02 : by means of beater arms.

IPC2013 > D > D01 > D01G > D01G 7/00 > D01G 7/02[1] > by means of beater arms.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D SECTION D — TEXTILES; PAPER.
D01 NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING.
D01G PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING (winding or unwinding, conducting or guiding laps, webs, slivers, or rovings in general, sliver or roving cans, depositing in sliver or roving cans B65H; preparation of fibres for paper-making D21).
D01G 7/00 Breaking or opening fibre bales.
D01G 7/02 · by means of beater arms.