Scissors type steel shearing apparatus with polygonal shearing b

Details Scissors type steel shearing apparatus with polygonal shearing b Scissors type steel shearing apparatus with polygonal shearing b

1995-09-08

1998-05-12

Rachuba, Maurina T.

Cutlery

Combined cutlery or combined with ancillary feature

With material-holder or disposal

83928, B25P 1900

Patent

active

057491461

ABSTRACT:
A shearing machine includes a generally hexagonal shearing blade and a generally rectangular shearing blade on each of an upper and a lower jaw. The hexagon forms a point at the forward end of the hexagonal shearing blade dividing a main shearing edge from an auxiliary shearing edge. A hexagonal edge at the rear of the hexagonal shearing blade forms a relief edge which unloads shearing forces to permit full shearing force to be directed to the rectangular shearing blade during a final stage of shearing a sheet of material. An end of the rectangle is preferably abutted to a portion of the relief edge, without provision for a gap or clearance therebetween. Embodiments are disclosed in which the shape of the shearing blade is non-hexagonal. In one disclosed embodiment, the shape of the shearing blade is non-polygonal, in that at least one edge is a curve.

REFERENCES:
patent: 404736 (1889-06-01), Sanford
patent: 4175624 (1979-11-01), van der Lely
patent: 5186507 (1993-02-01), Neidfeld

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