Patent ID: 8596894

Claim:
A paper cutting device comprising: a fixed blade having a cutting edge; a first movable blade, having a first cutting edge terminating in a first cutting point and a second movable blade, having a second cutting edge terminating in a second cutting point, disposed for relative movement against the fixed blade with the blade points facing the fixed blade in mutual opposition, the first movable blade having a first guide channel and the second movable blade having a second guide channel; a first support stud for pivotably supporting rotational movement of the first movable blade; a second support stud for pivotally supporting rotational movement of the second movable blade independent of the first movable blade; a cutter drive mechanism for driving the first movable blade and the second movable blade to cause a cooperative cutting operation; wherein the cutter drive mechanism includes a cutter motor; a gear train including a first gear that is rotationally driven by said cutter motor, and a second gear that is rotationally driven in response to rotation of the first gear; a first eccentric pin that is disposed to an eccentric position on the first gear and engages the first movable blade; and a second eccentric that is disposed to an eccentric position on the second gear and engages the second movable blade; a first cam formed by the first guide channel and the first eccentric pin for regulating the cutting operation of the first movable blade; and a second cam formed by the second guide channel and the second eccentric pin for regulating the cutting operation of the second movable blade; wherein the first movable blade and the second movable blade are (i) configured for movement independent of each other, and (ii) disposed so that the paths of the first cutting point and the second cutting point at least partially overlap during the cutting operation; and wherein the first guide channel or the second guide channel has a bend at approximately a middle portion thereof.