Patent ID: 7235156

Claim:
A wound or stacked product comprising: a plurality of paper sheet layers wound or stacked to form the product, each paper sheet layer having an exterior surface that defines ridges and valleys oriented in a first direction, wherein each said paper sheet layer comprises a multi-ply paper sheet or a single-ply paper sheet, wherein said paper sheet layers are positioned adjacent to each other when stacked or wound such that said ridges and valleys of each paper sheet layer are substantially parallel to said ridges and valleys of adjacent paper sheet layers when wound or stacked; and bridging regions formed into each said exterior surface of said paper sheet layers such that said bridging regions extend outward from said exterior surface, said bridging regions having a length sufficient to extend across at least two of said ridges, said bridging regions having a length-to-depth ratio of from about 5:1 to about 40:1, said bridging regions at least partially obstructing said ridges and valleys of said surface of each paper sheet layer from mating with said ridges and valleys of said surface of adjacent paper sheet layers to inhibit nesting between each paper sheet layer when stacked or wound into the product.