Blanking cutter

Details Blanking cutter Blanking cutter

B - Operations, Transporting

26

F

164/135

B26F 1/44 (2006.01)

Patent

CA 2036144

A blanking cutter cuts out a dumbbell-shaped test piece from a sheet of rubber, plastic, vinyl, polyethylene, paper, or the like. The dumbbell-shaped test piece has wider opposite ends and a narrower intermediate strip por- tion joined thereto along curves. The blanking cutter has a base, a plurality of flexible shearing blades, and a plural- ity of presser plates which clamp the shearing blades against the sides of the base. The shearing blades fully surround the outer profile of the base and have respective cutting edges projecting beyond the base and the presser plates. The sides of the outer profile of the base which correspond to the intermediate strip portion of the dumbbell-shaped test piece, and the sides of the presser plate which are held intimately against those sides of the base with the corresponding shearing blades clamped therebetween, comprise concave surfaces having respective radii of curvature which are greater than the radii of curvature of the curves along which the opposite ends and intermediate strip portion of the dumbbell-shaped test piece are joined to each other.

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