SPRING CORE HAVING BORDER WIRE WITH GENERALLY RECTANGULAR CROSS-SECTION

摘要

A bedding or seating product (10) comprising a spring core (12) including at least one border wire (17, 18) and a plurality of coil springs (14). Each of the border wires (17, 18) is generally rectangular in cross-section to reduce wire costs without compromising beam strength of the border wire. Each of the coil springs (14) may be made of a single piece of wire having a central spiral portion (28) defining a central spring axis (A) and terminating at opposed ends with upper and lower end turns (30). The coil springs (14) may be arranged in side-by-side rows (32) and columns (34) and be connected with each other at the upper and lower end turns by helical lacing wires (16).