Cutting blade and method for cutting sheet material

Details Cutting blade and method for cutting sheet material Cutting blade and method for cutting sheet material

1989-06-23

1991-01-15

Bray, W. Donald

Cutting

Tool or tool with support

Reciprocable type

30350, 30357, 761011, 83701, 831741, D06H 700

Patent

active

049844920

ABSTRACT:
In a reciprocating blade for cutting sheet material first and second side surfaces inclined relative to one another intersect to define an elongated cutting edge. The cutting edge is offset from a reference plane located midway between the side faces of the blade so that the first side surface passes through the reference plane in going from its associated side face to the cutting edge. At least the first side surface is covered with a thin coat of hard material harder than the base material of the blade. During use the second side surface is ground to cause the cutting edge to be defined by the hard material covering the first side surface. As a result of repeated sharpening grindings of the second side surface the cutting edge gradually moves to and then beyond the reference plane to give the blade a long useful service life.

REFERENCES:
patent: 3225802 (1965-12-01), Engi
patent: 3681846 (1972-08-01), Gerber
patent: 3882749 (1975-05-01), Tourek
patent: 3977287 (1976-08-01), Beale
patent: 4133236 (1979-01-01), Pearl
patent: 4574673 (1986-03-01), Pearl
patent: 4653373 (1987-03-01), Gerber
patent: 4732064 (1988-03-01), Pearl

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