US 2012/0181326 A1 · DIE-CUTTING BLADE AND CASE-FORMING DIE-CUT BLANK

Abstract

A die-cutting blade can form smooth die-cut lines in case-forming blanks which are less likely to injure hands, even if touched by the hands. A strip-plate-shaped steel blade plate has a pair of chamfers formed on opposite side surfaces of the blade plate, respectively, so as to extend from one side edge of the blade plate at substantially equal inclination angles. The chamfers define a cutting edge along the one side edge. The cutting edge has a composite wave pattern formed from a small wave pattern bent to have a wave shape within the range of the thickness of the blade plate, and a large wave pattern formed by a large undulation in the small wavy edge toward opposite side surfaces of the blade plate over its entire length within the range of the thickness of the blade plate, in order to provide smooth die-cut lines.

Claims20

Dependent claims

A sheet die-cutting blade comprising a strip-plate-shaped blade plate having a predetermined length and made of a steel plate, the blade plate being provided with a pair of chamfers formed on the respective side surfaces of the blade plate so as to extend from one side edge of the blade plate at substantially the same inclination angle, the chamfers defining a cutting edge along the one side edge of the blade plate,

characterized in that the cutting edge has a composite wave pattern comprising a large wave pattern and a small wave pattern, the large wave pattern comprising a plurality of longitudinally continuous large waves, the small wave pattern comprising a plurality of longitudinally continuous small waves, wherein each of the large waves contains a plurality of the small waves, and wherein the small wave pattern is entirely located within the thickness of the blade plate.

Dependencies are inferred from the claim text.

Die-cutting blade and case-forming die-cut blank

Life of this patent

Die-cutting blade and case-forming die-cut blank

Life of this patent

Abstract

Claims20