Spring core having border wire with generally rectangular cross-section

摘要

A bedding or seating product comprising a spring core including upper and lower border wires. Each of the border wires is generally rectangular in cross-section to reduce wire costs without compromising beam strength of the border wire. Each row of springs of the spring core may be made of a single piece of wire. The rows of springs may be arranged in side-by-side rows and columns and be connected with each other by helical lacing wires.

主权项

1. A bedding or seating product comprising:
a spring assembly made up of upper and lower border wires and a plurality of rows of springs connected with each other by helical lacing wires, wherein each of the border wires has a generally rectangular cross-sectional configuration, each of the border wires having top and bottom surfaces defining a height of the border wire and side surfaces defining a width of the border wire, the height being greater than the width when the spring core is oriented such that the border wires are horizontal, each of the rows of springs being made of a single piece of wire, each of said springs having a central spiral portion defining a central spring axis, adjacent springs within a row being connected with each other by connectors and adjacent rows of springs being connected with each other by helical lacing wires, wherein the outermost connectors of each of the rows are positioned below the upper border wire and above the lower border wire, each of the outermost connectors being clipped to the nearest border wire with at least one clip, each of the clips having two sides parallel the side surfaces of the border wires and two curved ends of different radiuses; padding overlaying the spring assembly; a fabric covering encasing the padding and spring assembly.