overlapping the sheets to be fastened together in a generally parallel relationship to form {HEAD ~ an overlap region} having a first side and {TAIL ~ a second side}, one sheet of the plurality of sheets being thicker than the other of the plurality of sheets 
overlapping the sheets to be fastened together in a generally parallel relationship to form { HEAD ~ an overlap region } having a first side and { TAIL ~ a second side } , one sheet of the plurality of sheets being thicker than the other of the plurality of sheets
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH