US Patent 7793608 Reserve sheet material roll with low supply indicator

A sheet material supply roll wrapped on a core tube including a reserve segment of sheet material spirally wrapped around the core tube with a supply segment of sheet material spirally wrapped on top of the reserve segment of sheet material. Different methods for placement or attachment of the roll ends are provided including perforated, overlapping, spaced, and integrated flap methods and apparatus. Further, a cross oriented low supply indicator is provided on the supply roll to provide a quick indicator of the end of roll without disrupting the remaining integrity of the supply.