Unitary structured multi-tier drape

1. A drape for a tiered surgical operating table, comprising:

a pair of elongated sheets connected at aligned distal ends to define a skirt for a drape, a first one of the elongated sheets defining a first side wall and a back wall and a second one of the elongated sheets defining a second side wall opposing the first side wall and a front wall opposing the back wall, each elongated sheet having a length exceeding a width and each elongated sheet having a first portion of a first width and a second portion of a second width greater from the first width so that side walls thereby define a stepped structure;

a pair of paper and non-permeable material laminated tier sheets, a first one of the tier sheets attached on opposing sides to respective first edges of the first portion of the elongated sheets and a second one of the tier sheets attached on opposing sides to respective edges of the second portion of the elongated sheets;

a central panel attached on opposing lateral sides to a respective transition edge of the elongated sheets between the first portion and the second portion thereof and attached on opposing second sides to a respective inner edge of the first tier sheet and the second tier sheet, whereby the central panel is substantially normal to the first tier sheet so that the drape has a stair-step structure; and

the first and second side walls extending uninterrupted from the respective first edges to a free distal edge in a common plane remote from the first tier sheet.

2. The drape as recited in claim 1 , wherein adjacent edges of the elongated sheets, the tier sheets and the central panel are joined by an inwardly formed weld connection.

3. The drape as recited in claim 2 wherein the weld connection is a heat weld.

4. The drape as recited in claim 2 , wherein the weld connection is a sonic weld.

5. The drape as recited in claim 1 , further comprising a second central panel attached to the first central panel at a plurality of spaced-apart seams to define a plurality of packets for receiving articles during surgery.

6. The drape as recited in claim 5 , wherein the second central panel is transparent.

7. The drape as recited in claim 1 , wherein the elongated sheets define gathers of sheet proximate the transition edge connection with the first tier sheet to facilitate disposing the central panel substantially normal to the first tier sheet.

8. The drape as recited in claim 1 , wherein the non-permeable material is a plastic sheet.

9. A drape for a tiered surgical operating table, comprising:

a skirt having at least two elongated non-permeable sheets connected at aligned distal ends to define a pair of opposing side walls, a front wall, and a back wall, each of the opposing side walls having a first portion of a first width and a second portion of a second width greater from the first width so that side walls thereby define a stepped structure;

a first tier sheet and a second tier sheet, each formed of a paper sheet and a non-permeable material sheet laminated together, the first tier sheet attached on opposing side edges to respective edges of the first portion of the side walls, and the second tier sheet attached on opposing side edges to respective edges of the second portion of the side walls;

a central panel attached on opposing lateral sides to a respective transition edge of the side walls between the first portion and the second portion thereof and attached on opposing second sides to a respective inner edge of the first tier sheet and the second tier sheet, whereby the central panel is substantially normal to the first tier sheet so that the drape has a stair-step structure; and

the first and second side walls extending uninterrupted from the respective first edges to a free distal edge in a common plane remote from the first tier sheet.

10. The drape as recited in claim 9 , wherein adjacent edges of the elongated sheets, the tier sheets and the central panel are joined by an inwardly formed weld connection.

11. The drape as recited in claim 10 wherein the weld connection is a heat weld.

12. The drape as recited in claim 10 , wherein the weld connection is a sonic weld.

13. The drape as recited in claim 9 , further comprising a second central panel attached to the first central panel at a plurality of spaced-apart seams to define a plurality of packets for receiving articles during surgery.

14. The drape as recited in claim 13 , wherein the second central panel is transparent.

15. The drape as recited in claim 9 , wherein the elongated sheets define gathers of sheet proximate the transition edge connection with the first tier sheet to facilitate disposing the central panel substantially normal to the first tier sheet.

16. The drape as recited in claim 9 , wherein the non-permeable material is a plastic sheet.