Knife assembly with tab blades and method of fabrication

A knife assembly comprising:

• a primary blade having a corrugated shape as a result of the primary blade defining a wave pattern that defines peaks and valleys, the primary blade having an upper surface, a lower surface, a cutting edge, a trailing edge, and a depth defined by and between the cutting and trailing edges, the peaks and valleys extending from the cutting edge toward the trailing edge of the primary blade;
• and
• a secondary blade having a corrugated shape as a result of the secondary blade defining a wave pattern that defines peaks and valleys, the secondary blade having an upper surface, a lower surface, a leading edge, a trailing edge, and a depth defined by and between the leading and trailing edges, the peaks and valleys of the secondary blade extending from the leading edge toward the trailing edge of the secondary blade, the upper surface of the primary blade and the lower surface of the secondary blade being complementary so that the secondary blade and the peaks and valleys thereof are able to nest on the primary blade and the peaks and valleys thereof, the peaks and valleys of the secondary blade being generally flat and interconnected by inclined walls, each of the peaks having a first inclined wall and a second inclined wall of the inclined walls adjoined thereto and defining therebetween first and second corners, respectively, the secondary blade having at least a first tab blade located at a first peak of the peaks of the secondary blade, a bend between the first tab blade and the first peak and oriented to extend between the leading and trailing edges of the secondary blade, and an opening defined in the first peak alongside and contiguous with the bend, the first tab blade and the opening being equal in size and shape;
• wherein the bend is disposed at one of the first corners that is defined by and between the first peak and one of the first inclined walls adjoined thereto;
• and
• wherein the opening in the first peak is located entirely within the first peak between the first and second corners thereof and is contiguous with the leading edge of the secondary blade.