Patent ID: 7503162

Claim:
A knife arrangement configured to be mounted on a reciprocating knifeback of a reciprocating cutter bar assembly, the twin knife comprising: a first cutting section extending in a forward direction and having a first lateral face with a serrated first cutting edge, the first cutting edge comprising a plurality of first troughs and first peaks that are arranged in an alternating manner; a first base fixed to a rearward end of the first cutting section and having at least one aperture for receiving a connector to couple the first base to the reciprocating knifeback; a second cutting section extending in the forward direction and having a first lateral face with a serrated second cutting edge, the second cutting edge comprising a plurality of second troughs and second peaks that are arranged in an alternating manner; and a second base fixed to a rearward end of the second cutting section and having at least one aperture for receiving a connector to couple the second base to the reciprocating knifeback; wherein, when the first base and the second base are mounted to the bar, the first troughs on the lateral face are offset in the forward direction from the second troughs on the lateral face and the second peaks are offset in the forward direction from the first peaks on the respective lateral faces.