Patent ID: 6986299

Claim:
Apparatus for cutting multiple stacked webs of laminated, tabbed rooting shingle material comprising: a multiple-cut shingle cutter adapted to simultaneously cut end cuts through multiple stacked webs of laminated, tabbed rooting shingle material to produce separate roofing shingles from the webs, each of the webs having distinct portions; at least first and second feeders, each of the first and second feeders adapted to move at least a first and a second web alone separate paths to the cutter; web handling apparatus adapted to receive the at least first and second webs from the first and second feeders, the web handling apparatus adapted to position the at least first and second webs of laminated, tabbed roofing shingle material in a stacked relationship prior to the cutter, wherein the at least second web is stacked below the at least first web; location sensors adapted to sense the locations of the distinct portions of the moving at least first and second webs, wherein the distinct portions of the first and second webs form repeated patterns; and a controller adapted to control the location of the cutting, based on the sensed locations of the distinct portions of the multiple stacked webs, so that the end cuts of the separate rooting shingles are positioned at predetermined locations relative to the distinct portions.