Spring assembly for furniture and method of manufacture

Claim 1

A spring assembly for furniture comprising a wire mesh formed of a border frame and two groups of wires lying parallel to a common plane and intersecting one another, said wires being welded together at their intersections, the wires of each group being substantially parallel to one another, the wires of at least one of said groups being formed with a plurality of return bends each providing a channel open in a common direction normal to the same surface of said mesh, said border frame extending around the periphery of said mesh, intersecting the ends of both of said groups of wires, and being welded to said ends, and a plurality of coil springs, said return bends being arranged in pairs, each pair freely receiving an end convolution of one of said coil springs in the channels thereof, said return bends being bent to overly said convolutions to lock said coil springs to said mesh.

Claim 5

The method of making a spring assembly for furniture which comprises the steps of: forming a plurality of return bends in longitudinally spaced relation in each of a first group of wires, each of said return bends providing a channel open in a direction transverse to the wire; forming a wire mesh by arranging said first group of wires in parallel spaced relation and arranging a group of second wires in parallel spaced relation and intersecting said first group of wires, said first and second groups of wires being arranged in a common plane, said wires being located so that said return bends are arranged in opposed pairs spaced apart a distance equal to the diameter of an end convolution of a preselected coil spring, said opposed pairs being spaced between said intersections, and said channels are open in a common direction normal to said common plane and facing one surface of said mesh; providing a wire border frame; welding said wires to one another at their points of intersection and welding ends of said wires to said border frame; inserting an end convolution of each of a plurality of coil springs into an opposed pair of said channels; and upsetting said return bends over said convolutions to close said channels and lock said springs to said wire mesh.

Claim 6

The method of making a spring assembly for furniture which comprises the steps of: forming a plurality of return bends in longitudinally spaced relation in each of a first group of wires, each of said return bends providing a channel open in a direction transverse to the wire; forming a wire mesh by arranging said first group of wires in parallel spaced relation and arranging a group of second wires in parallel spaced relation and intersecting said first group of wires, said first and second groups of wires being arranged in a common plane, said wires being located so that said return bends are arranged in opposed pairs spaced apart a distance equal to the diameter of an end convolution of a preselected coil spring, said opposed pairs being spaced between said intersections, and said channels are open in a common direction normal to said common plane and facing one surface of said mesh; providing a wire border frame; welding said wires to one another at their points of intersection and welding ends of said wires to said border frame; inserting an end convolution of each of a plurality of coil springs into an opposed pair of said channels; and upsetting said return bends over said convolutions to close said channels and lock said springs to said wire mesh.

Claim 8

The method of making a spring assembly for furniture which comprises the steps of: forming a first group of wires with longitudinally spaced return bends providing open channels; arranging said first group of wires in parallel relation, and arranging a second group of wires in parallel relation, with said groups lying in a common plane in mutually intersecting relation, and with said channels arranged in rows spaced between intersections of said wires and open in a common direction normal to said common plane; arranging a wire border frame about said groups of wires to lie in said common plane and engage end portions of both of said groups of wires; forming a unitary mesh by welding said wires to one another at points of intersection between said groups, and to said border frame at points of engagement therewith; inserting an end convolution of each of a plurality of coil springs into a pair of said channels lying in the same row and formed in adjacent wires of said first group; and upsetting said channels to lock said convolutions of said springs to said mesh.

Claim 9

The method of making a spring assembly for furniture which comprises the steps of: forming a first group of wires with longitudinally spaced return bends providing open channels; arranging said first group of wires in parallel relation, and arranging a second group of wires in parallel relation, with said groups lying in a common plane in mutually intersecting relation, and with said channels arranged in rows spaced between intersections of said wires and open in a common direction normal to said common plane; arranging a wire border frame about said groups of wires to lie in said common plane and engage end portions of both of said groups of wires; forming a unitary mesh by welding said wires to one another at points of intersection between said groups, and to said border frame at points of engagement therewith; inserting an end convolution of each of a plurality of coil springs into a pair of said channels lying in the same row and formed in adjacent wires of said first group; and upsetting said channels to lock said convolutions of said springs to said mesh.