Perforated laminar heating element

Abstract

A laminar heater with an electrically conductive laminar heating element having a pair of electrically conductive busbars disposed adjacent opposite ends of the heating element and at least a first area having a plurality of perforations with a generally polygonal geometry. Embodiments include those with Y-shaped perforations, including some with one prong diverging into a bulbous, optionally diamond-shaped, end, and those defined by an array of generally diamond shaped perforations intermeshed with an array of circular shaped perforations. Processes of manufacture and installation, heating systems including such heaters, and multi-ply embodiments having non-metal plies and an outer metal surface layer, are also disclosed.

Dependencies are inferred from the claim text.