A perforating blade and signature

Details A perforating blade and signature A perforating blade and signature

B - Operations, Transporting

42

D

B42D 1/00 (2006.01) B26D 1/56 (2006.01)

Patent

CA 2271576

A perforating blade (10), and signature (32) produced therewith, having a unitary blade (12) that is very narrow in width in proportion to its length, with a cutting edge (16) along one longitudinal side. The cutting edge (16) comprises a combination of a number of spaced-apart straight (22) and angled (20) sections arranged so that the angled sections (20) angle inwardly toward a center point (18) on the perforating blade and along a single side of the cutting edge only. Since the angled sections (20) are all angled to the same side of the blade, the resulting fold line (26) has cuts only on one side (29) thereof. The angled cuts result in ties (28) that twist easily, and that, therefore, result in fold lines (26) that fold cleanly without gusseting or binding.

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