Posturized bedding or seating product incorporating Bonnell coil springs with tapered middle portions

摘要

A posturized bedding or seating product is provided comprising a spring assembly made up of a plurality of parallel rows and columns of coil springs joined to each other. Each coil spring comprises a pair of knotted end turns with a plurality of conically tapered central convolutions therebetween. Certain sections of the product are made firmer than other sections by inverting the coil springs of one section relative to another section.