Patent ID: 6953166

Claim:
An apparatus ( 1 ) for treating material, comprising: a feed device ( 4 ), which is provided with a receiving opening for feeding the material; at least two shafts ( 14 , 15 ), which are disposed parallel to one another and are seated to rotate, and are connected to a drive device ( 6 ) that is designed to set the shafts ( 14 , 15 ) into a rotational movement in opposite directions; and elements ( 23 ) for exerting a notch effect on brittle components of the material to be reduced, the elements being connected to the shafts ( 14 , 15 ) for forming cracking mechanism ( 5 ), wherein the elements ( 23 ) that exert a notch effect are disposed in groups at locations on the shafts ( 14 , 15 ) that are axially spaced ( 16 , 17 ) from one another, the elements ( 23 ) of a group ( 31 , 32 , 33 ) that exert a notch effect are disposed on a circle that is coaxial relative to the shaft ( 14 , 15 ), and the elements ( 23 ) of adjacent groups ( 31 , 32 , 33 ) that exert a notch effect are disposed on circles having different diameters.