| CPC E04D 1/26 (2013.01) [E04D 1/125 (2013.01); E04D 1/28 (2013.01)] | 22 Claims |
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1. A roofing shingle, comprising:
a first layer comprising:
a headlap portion configured to be overlapped by at least one additional roofing shingle arranged in a next higher course of roofing shingles; and
an exposure portion having a plurality of tabs;
a second layer opposite the first layer;
a plurality of indentations formed in the first and second layers of the roofing shingle; and
raised areas along the plurality of tabs of the exposure portion formed from one or more of the plurality of indentations;
wherein the plurality of indentations are configured to attach the first and second layers;
wherein one or more of the plurality of indentations are formed in registration with one or more of the plurality of tabs of the exposure portion of the first layer; and
wherein the plurality of indentations comprises a first plurality of indentations formed along the first and second layers in a machine direction and in registration with a common bond area between the first and second layers; and a second plurality of indentations formed along the first and second layers in the machine direction; wherein the first plurality of indentations and the second plurality of indentations are arranged at positions spaced across the first and second layers in a cross-machine direction.
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