Cutting – Tool or tool with support – Cutting couple type
Patent
1988-08-23
1990-03-06
Yost, Frank T.
Cutting
Tool or tool with support
Cutting couple type
83688, 83689, 30360, B26F 114
Patent
active
049055577
ABSTRACT:
The punch comprises peripheral cutting edges and lateral cutting edges. The peripheral edges cut a slug in the desired shape, for examples, rectangular, square, oval, trapezoidal, D and double D-shaped, etc. while the lateral edges cut transversely from one peripheral edge to an opposite peripheral edge, thereby splitting the slug. Lateral cutting edges provide a dividing line across the working face. Surfaces and cutting edges on each side of the dividing line are similar and canted at opposite angles. Lateral cutting edges and peripheral cutting edges at their juncture provide pyramidal cutting sections which initially pierce the workpiece and initiate lateral slug splitting. This split grows from the slug periphery toward the center. Splitting is complete before a substantial portion of the slug periphery is cut.
REFERENCES:
patent: 294991 (1884-03-01), Goodman et al.
patent: 389404 (1888-09-01), O'Neill
patent: 2214701 (1940-09-01), Scull
patent: 3296905 (1967-01-01), Killaly
patent: 4353164 (1982-10-01), Linquist et al.
patent: 4543722 (1985-10-01), Adleman et al.
Giangiorgi R. A.
Greenlee Textron Inc.
Rada Rinaldi
Yost Frank T.
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