Patent ID: 8332974

Claim:
A bedding foundation comprising: a rectangular base; a spring assembly fixedly attached atop the base; padding overlying the spring assembly; a fabric covering surrounding the spring assembly, padding and base; the spring assembly comprising, a generally rectangular border wire having two parallel sides and two parallel ends; and a plurality of spaced and longitudinally extending support wires parallel the border wire sides and extending between the border wire ends, each support wire being a continuous piece of wire having a plurality of peaks and a plurality of valleys, flattened distal portions of the peaks being generally co-planar with the border wire and flattened distal valley portions being vertically displaced beneath and intermediate of the distal peak portions; wherein the border wire has a generally rectangular cross-sectional configuration and is re-shaped from a smaller diameter wire than a border wire having a circular cross-section having approximately the same beam strength, thereby enabling the nestably stackable wire core assembly to be made using less material.