MILL FOR GRINDING WOOD MATERIAL Russian patent published in 2000 - IPC

FIELD: grinding wood materials. SUBSTANCE: mill has housing with impeller and drum mounted inside it. Mounted on drum are sieves and teeth units. Teeth are arranged in each unit in stepwise manner; height of stages increases in way of rotation of impeller. Openings in sieves may be widened. Sieves may be made for radial motion. Front edge of each sieve may be sunken and rear edge may be mounted extending relative to inner surfaces and respective ends of units. EFFECT: enhanced efficiency of mill due to increased productivity and quality of wood particles and due to increased service life of sieves. 4 cl, 2 dwg