Patent ID: 7021577

Claim:
A multi-roller crusher for comminuting mineral material to be crushed comprising two juxtaposed counter rotating crushing rollers receiving lumps of mineral material to be crushed between them, the crushing rollers being provided with radially projecting individual and discrete crushing teeth spaced apart both in a peripheral direction and in a circumferential and longitudinal axial, direction in a developed view of each crushing roller in plan view, the crushing teeth are so arranged that they form a plurality of successive crushing tooth groups, whose imaginary connection lines at a presettable angle of inclination in relation to the developed view, extend towards one another from a respective outer edge of the crushing roller in the direction of a crushing roller center, the adjoining and opposite crushing teeth of the crushing tooth groups defining in an intake region between the counter-rotating crushing rollers continuously repetitive, primary crushing chambers, the imaginary connection lines of the crushing tooth groups of each crushing roller, in relation to the developed view being so oriented towards one another that arrows are formed, which are oriented towards one another.