| CPC B26D 7/0691 (2013.01) [B26D 1/03 (2013.01); B26D 7/2614 (2013.01); B26D 2001/006 (2013.01)] | 10 Claims |
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1. A knife assembly comprising:
a knife blade of which a front edge is a cutting edge, wherein the knife blade is planar with a straight cutting edge;
a holder configured for supporting the knife blade;
a clamp arranged for clamping the knife blade onto the holder; and
a fastening mechanism cooperating with the clamp and the holder for securing and clamping the knife blade between the clamp and the holder with the cutting edge protruding at a front side of the knife assembly;
wherein the holder comprises a frontal part or portion which is the foremost part or portion of the knife assembly at a bottom side of the knife blade, and of which a foremost contact point is, in clamped state, in contact with the bottom side of the knife blade at a first distance from the cutting edge,
wherein the clamp has a leading edge which, in clamped state, clamps onto a top side of the knife blade at a second distance from the cutting edge, the second distance being smaller than the first distance,
wherein the clamp has a second clamping portion which, in clamped state, clamps onto the top side of the knife blade at a third distance from the cutting edge, the third distance being greater than the first distance, and
wherein the holder has a curved bearing surface with a curvature in a direction rearward from the cutting edge and the clamp has a complementary curved clamping surface such that in clamped state, as a result of tightening the fastening mechanism, the clamp pushes the knife blade down onto the curved bearing surface of the holder such that the knife blade takes a curved shape while the cutting edge remains straight, and
wherein in clamped state both the holder and the clamp have a surface contact with the knife blade along said complementary curved surfaces.
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