An apparatus and method for angled perforation of sheet metal roof decking

摘要

A punching assembly for use on a longitudinal strip of material, the punching assembly including a support means adapted to support a punching means in a position to receive the longitudinal strip of material, the punching means being rotatable about a vertical axis of rotation relative to the support means and thereby adapted to produce a perforated line across the material along a pre-determined angle.