US Patent 8459265 Unitary structured multi-tier drape

A drape having a pair of elongated sheets connected at distal ends to define a skirt, with opposing side walls in a first portion of the elongated sheets having a first width and in a second portion having a different width so the drape has a stair-step structure, with a paper and plastic laminated first and second tier panels attached to the elongated sheets in spaced-relation and a central panel attached therebetween, for covering a tiered surgical operating table.