Knife blades

B - Operations – Transporting – 26 – B

Patent

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Details

B26B 9/00 (2006.01)

Patent

CA 2215194

The invention relates to knife blades and to a method of their production. Knife blades of the type with a hardened surface intended to enhance cutting performance, are known, such as, for example in EP 92908829.2, and EP 93303062.9. Such knife blades display considerably improved cutting characteristics in comparison with conventional blades and the object of the invention is to provide a knife blade exhibiting still further enhanced cutting characteristics. This objective is met by a knife blade comprising a cutting edge formed on a blank, one side of the edge being provided with a coating formed by a particulate material in a matrix, the matrix being softer than the particulate material, and the coating being such that a considerable number of the particulates project from the matrix in the vicinity of the cutting tip of the blade edge, to form the cutting tip.

La présente invention concerne des lames de couteaux et un procédé s'appliquant à leur production. Des types de lames de couteaux présentant une surface durcie destinée à accroître l'efficacité de coupe ont fait l'objet de demandes de brevets, notamment les demandes EP 92908829.2 et EP 93303062.9. De telles lames de couteaux présentent des caractéristiques de coupe nettement supérieures à celles des lames conventionnelles. Toutefois, la présente invention concerne une lame de couteau présentant des caractéristiques de coupe encore supérieures. Pour cela, la lame de couteau comporte un tranchant réalisé sur une pièce découpée, l'une des faces du tranchant étant revêtue d'un matériau particulaire disposé dans une matrice, laquelle matrice est plus tendre qu'un nombre considérable de particules dépassant de la matrice au voisinage du fil du tranchant de la lame, formant ainsi le fil de la lame.

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