DOUBLE ROTOR SHEAR AND METHOD FOR DRIVING THE SAME, CARDBOARD CUTTER AND SYSTEM FOR AUTOMATICALLY FORMING PACKAGING BOXES COMPRISING SAID DOUBLE ROTOR SHEAR

摘要

Double rotor shear, comprising a first rotor (1) comprising at least one first cutting edge (3a), a second rotor (2) comprising at least one second cutting edge (3b), a driving mechanism (10, 12) for rotatably driving the first rotor (1), wherein said first and second rotors (1, 2) are arranged on axes for moving the cutting edges into and out of a travelling plane of a sheet between said first and second rotors (1, 2), said at least one first cutting edge of the first rotor (1) and said at least one second cutting edge of second rotor (2) forming at least one pair of cutting edges adapted for cutting a sheet between the cutting edges forming said pair, wherein the second rotor (2) is rotatably driven by said at least one first cutting edge (3a) pushing directly or indirectly against said at least one second cutting edge (3b).