Panel and method of forming same

摘要

A method of cold forming a length of polycarbonate sheet, including the step of feeding the polycarbonate sheet through a roll forming station. A security panel having opposed side edges bent to extend back over a central portion of the panel between the side edges so as to form retaining rails for retaining the security panel within a channelled frame of a security closure, wherein the opposed side edges are bent by a method of roll forming.