Patent ID: 6471812
Filing Date: 2002-10-29
Classification: E04D,Y10T

Abstract:
A method of reducing humping of a laminated roofing shingle when the shingle is stacked with others of the shingle, each laminated roofing shingle including a shingle overlay having a plurality of spaced apart tabs defining cutouts therebetween, and a generally uniform thickness, each cutout having an inner end, and a shingle underlay having a generally uniform thickness, and an inner end, the method comprising:providing the shingle overlay and the shingle underlay; forming a longitudinal depression at the inner end of the shingle underlay and forming a longitudinal depression inwardly of the inner end of the cutout of the shingle overlay, and laminating the shingle underlay to the shingle overlay to form the laminated roofing shingle such that the underlay depression and the overlay depression are aligned.