Strip-shaped knife for use in punching machines and the like
OwnerKarl Marbachinventor
Life of this patent
Estimating the term…
Abstract
A punching tool wherein the knife is a strip of steel and has a cutting edge flanked by two mutually inclined concave facets. The facets are disposed between the cutting edge and two lateral surfaces which have concave portions adjacent the respective facets. Those portions of the knife which are disposed between the facets and the concave portions of the respective lateral surfaces are rounded.
Claims16
A cutting tool, particularly a punching or stamping tool, comprising a substantially strip-shaped knife having a cutting edge, a pair of lateral surfaces and a substantially concave facet between said edge and each of said lateral surfaces, said lateral surfaces being inclined with respect to the corresponding facets and each of said lateral surfaces having a concave portion adjacent the corresponding facet.
Dependencies are inferred from the claim text.