Dual notebook

1. A dual notebook comprising:

a sheet of backing material;

a first set of papers bound to said backing material and having a thickness;

a second set of papers bound to said backing material and having a thickness;

a first binding mechanism binding said first set of papers to said backing material the first binding mechanism being comprised of a first plurality of twin-wire coils; and

a second binding mechanism binding said second set of papers to said backing material, the second binding mechanism being comprised of a second plurality of twin-wire coils,

wherein said backing material is configured to be folded into a folded position wherein said folded backing material is positioned between said first and second set of papers in a thickness direction of said notebook, and wherein said backing material is movable to a flat position wherein said backing material is generally flat, and wherein at least a first coil of the first binding mechanism is configured to be received between a corresponding pair of second coils of the second binding mechanism to retain said notebook in said folded position.

2. The notebook of claim 1 wherein said backing material forms a generally two-ply sheet of material when said backing material is in said folded position, with both plies being located between said first and second sets of papers in said thickness direction.

3. The notebook of claim 1 wherein said backing material includes a pair of opposed outer edges, and wherein said first set of papers is bound at or adjacent to one of said outer edges, and said second set of papers is bound at or adjacent to the other one of said outer edges.

4. The notebook of claim 3 wherein said backing material is generally rectangular when in said flat position.

5. The notebook of claim 1 wherein said backing material includes a folding guide line about which said backing material is foldable.

6. The notebook of claim 1 wherein said backing material has a width dimension extending generally perpendicular to a direction about which said backing material is configured to be folded, and wherein said first and second sets of paper have a combined width that is less than the width of said backing material.

7. The notebook of claim 1 wherein said first and second sets of papers each include an inner edge, wherein said inner edges are generally parallel and spaced apart by a distance less than the combined thickness of said first and second sets of papers.

8. The notebook of claim 1 wherein said first and second sets of papers can be individually accessed when said backing material is in said folded position.

9. The notebook of claim 1 wherein said backing material has a first portion supporting said first set of papers and a second portion supporting said second set of papers, wherein said first and second portions overlap and are oriented generally parallel and immediately adjacent to each other when said backing material is in said folded position.

10. The notebook of claim 1 further comprising a first cover bound to first set of paper and a second cover bound to said second set of papers, each cover having at least one of a thickness or stiffness greater than each paper of the associated set of papers.

11. The notebook of claim 1 further comprising a retaining device coupled to at least one of said backing material or said first or second set of papers, wherein said retaining device is configured to retain said backing material in said folded position.

12. The notebook of claim 11 wherein said retaining device includes a strip of elastic material.

13. The notebook of claim 1 wherein said first set of papers has a calendar portion printed thereon and said second set of papers has a calendar portion printed thereon, and wherein said first and second calendar portions overlap chronologically.

14. The notebook of claim 1 wherein the first coil of the first binding mechanism is configured to be retained by spring force between the corresponding pair of second coils.

15. The notebook of claim 1 wherein the first plurality of twin-wire coils respectively interleave with the second plurality of twin-wire coils.

16. The notebook of claim 1 wherein said first and second sets of papers each have a thickness, and wherein when said backing material is in said flat position said first and second sets of papers are spaced apart by a distance less than the combined thickness of said first and second sets of papers.

17. A method for using a notebook comprising:

providing a notebook having a sheet of backing material, a first set of papers bound to said backing material, a second set of papers bound to said backing material and spaced apart from said first set of papers, a first binding mechanism binding said first set of papers to said backing material, and a second binding mechanism binding said second set of papers to said backing material, the first binding mechanism being comprised of a first plurality of twin-wire coils, and the second binding mechanism being comprised of a second plurality of twin-wire coils; and

forming said backing material into a folded position wherein said folded backing material is positioned between said first and second set of papers in a thickness direction of said notebook, at least a first coil of the first binding mechanism being configured to be received between a corresponding pair of second coils of the second binding mechanism to retain said notebook in said folded position.

18. The method of claim 17 wherein said first and second sets of papers each have a thickness, and wherein when said backing material is in said flat position said first and second sets of papers are spaced apart by a distance less than the combined thickness of said first and second sets of papers.

19. The method of claim 17 wherein said backing material forms a generally two-ply sheet of material when said backing material is in said folded position, with both plies being located between said first and second sets of papers in said thickness direction.