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US 4,317,399 AGranted
Die cutter for stamping rectangular objects with rounded corners
AssigneeI.M.A. Industria Macchine Automatiche S.P.A.
InventorAndrea Romagnoli
Life of this patent
Estimating the term…
Abstract
A device designed to stamp generally rectangular blister packages from an intermittently advancing laminated strip comprises a die with rounded corners whose radii of curvature are substantially larger at a transverse leading edge than at a transverse trailing edge as seen in the direction of strip motion. The width of the die slightly exceeds the advance of the strip between cutting operations whereby packages stamped from the strip exhibit obtuse angles but no pointed projections at their forward edges.
Claims5
A device for stamping generally rectangular objects from a strip of sheet material, comprising:
- a support having a cutout of generally rectangular shape;
- feed means for intermittently advancing a strip to be cut along said support with lateral edges slightly projecting beyond said cutout;
- and
- a generally rectangular die synchronized with said feed means confronting said cutout for periodically cutting an object from the advancing strip during periods of standstill thereof, said die having quadrantly arcuate corners of relatively small radius at junctions of a transverse trailing edge with a pair of longitudinal edges and further having quadrantally arcuate corners of relatively large radius at junctions of a transverse leading edge with said longitudinal edges, said feed means advancing said strip between cutting strokes of said die by a pitch slightly less than the spacing of said leading and trailing edges.
1 more element
Dependencies are inferred from the claim text.