Cutlery – Blades – Toothed or waved
Patent
1997-10-14
2000-08-29
Payer, Hwei-Siu
Cutlery
Blades
Toothed or waved
30357, B26B 902
Patent
active
06108915&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to the field of cutlery and it has as an object a relief of a blade of a cutting tool, in particular of a knife.
There are known profiles which are arranged on the blades in order to level their cutting loss due to use and wear, which profiles are constituted by microtoothing which is composed of a plurality of incurved surfaces having parallel generatrixes, called microbevels, defining with one of the side faces of the blade a plurality of respective microcutters.
The inconvenience of the conventional microtoothing, formed by a plurality of short microbevels arranged along the blade, is based on the fact that the resulting short microcutters form a toothing which induces a shredding of the material to be cut up, where the tool therefore practically no longer cuts and, finally, being of a delicate use since the material, in particular meat, is soft.
In order to remedy this inconvenience, the efforts of the innovators has been directed to the refining of a microtoothing composed of short microbevels and of long microbevels, succeeding each other alternatingly, wherein the first shred the matter while the second cut the matter. One could in particular refer to the document EP-A-0220362 which describes a tool blade comprising such a microtoothing. In addition, the blade carries along its other face a bevel for reinforcing its cutting characteristic.
The result obtained is satisfying with regard to the improvement of the performance of the tool for cutting the matter but retains nevertheless another general drawback of microtoothed tools, namely to make their utilization delicate based on the presence of the microbevels which induce a tendency of the blade to incline itself by turning its blade edge toward the microbevelled face.
In addition, tools are known which carry a microtoothing composed of a plurality of short microcutters, successively formed by the short microbevels arranged respectively oppositely on each one of the side faces of the blade, in order to confer to the tool a natural stability during the time of its utilization.
The use of this type of tool, which is of relatively ancient origin, has been rapidly abandoned because of its high manufacturing cost, brought about by the difficulty of placing oppositely the microbevels arranged on the one and the other face of the blade, resulting in an unsatisfactory cut based on the cutter absence on the blade.
SUMMARY OF THE INVENTION
The object of the invention is to furnish a profile, of the type microtoothing, for a cutting tool, in particular a knife, which overcomes the aforesaid problems by conferring to the tool an optimum cutting and carving performance and a natural equilibrium of forces during its utilization.
Starting with the aforesaid analysis of the applicant, the ingenuity of the applicant has directed the applicant to overcome the prejudices and to break the attitudes and habits taken in this field in order to carry his conception and manufacturing efforts of a blade of a cutting tool onto a microtoothing composed of a succession of microcutters formed of short microbevels and of long microbevels, successively alternated and arranged on each of the side faces of the blade, in such a way that the tool has in a space, called cutting space, not only the short microcutters for shredding but also at least one long microcutter for cutting, arranged on both sides of the edge of the blade in order to confer to the tool a natural stability during the time of its utilization. Although the manufacture is more costly based on the delicate setting of the microbevels of one face of the blade with respect to those of the other face during the manufacture of the microtoothing, such a tool proves in a surprising manner to be competitive based on its optimum cutting quality and its ease of use.
In following his inventive step, the applicant has worked out a microtoothing where the short microbevels and the long microbevels, arranged on one of the faces of the blade, are preferably offset with respect to
REFERENCES:
patent: 1388547 (1921-08-01), Burns
patent: 2059414 (1936-11-01), Taylor
patent: 2555735 (1951-06-01), Estabrooks
patent: 3024533 (1962-03-01), Nitsch
patent: 4907344 (1990-03-01), Hahn
patent: 5787591 (1998-08-01), Lu
Verdier Aubry
Verdier Ronan
Kasper Horst M.
Payer Hwei-Siu
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