Patent ID: 6520439
Filing Date: 2003-02-18
Classification: B02C

Abstract:
A material processing mill comprising:a pair of rotatable rolls defining a material processing nip therebetween, at least one of the rolls being shiftable in at least generally opposite first and second directions relative to the other to vary the nip defined between the rolls; a drive for rotating said at least one of the rolls, said drive including a motor drivingly connected to said at least one of the rolls, said motor being shiftable while rotating said at least one of the rolls, said drive including a biasing mechanism configured to yieldably bias the motor in generally the first direction, said biasing mechanism including a spring, said motor being fixed relative to said at least one of the rolls so that the motor and said at least one of the rolls shift together; and a roll positioning mechanism operable to shift said at least one of the rolls among a plurality of positions, said roll positioning mechanism including a spring relief that yieldably maintains said at least one of the rolls in the position to which said at least one of the rolls has been shifted, said roll positioning mechanism including a single acting piston and cylinder assembly for effecting shifting of said at least one of the rolls in the second direction.