US Patent 7823926 Dual notebook

A dual notebook including a sheet of backing material, a first set of papers bound to the backing material and having a thickness, and a second set of papers bound to the backing material and having a thickness. The backing material is configured to be folded into a folded position wherein the folded backing material is positioned between the first and second set of papers in a thickness direction of the notebook. The backing material is movable to a flat position wherein the backing material is generally flat, and wherein when the backing material is in the flat position the first and second sets of papers are spaced apart by a distance less than the combined thickness of the first and second sets of papers.