| 1/00 |
Fibrous raw materials or their mechanical treatment (beaters D21D 1/00) |
| 1/02 |
Fibrous raw materials or their mechanical treatment (beaters D21D 1/00) Pretreatment of the raw materials by physical or chemical means (removal of bark B27L) |
| 1/04 |
Fibrous raw materials or their mechanical treatment (beaters D21D 1/00) by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; disintegrating peat C10F 7/02; obtaining fibres mechanically for spinning from rags, peat, or the like D01B) |
| 1/06 |
Fibrous raw materials or their mechanical treatment (beaters D21D 1/00) by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; disintegrating peat C10F 7/02; obtaining fibres mechanically for spinning from rags, peat, or the like D01B) by dry methods |
| 1/08 |
Fibrous raw materials or their mechanical treatment (beaters D21D 1/00) by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; disintegrating peat C10F 7/02; obtaining fibres mechanically for spinning from rags, peat, or the like D01B) by dry methods the raw material being waste paper (chemical part D21C 5/02); the raw material being rags |
