Wire spring assemblies made of nestably stackable half units

A wire spring assembly for a furniture article comprising:

• a first half unit including a first generally planar deck and a plurality of first spring elements extending in one direction from said deck and terminating in distal end portions, said first spring elements each outlining an inside cavity having a cross sectional area parallel to said first deck which increases progressively from said distal end portions to said first deck and each inside cavity being open at said first deck whereby a plurality of said first half units may be stacked together with the spring elements of one of said first half units being nested into the spring elements of the half unit therebelow;
• a second half unit including a second generally planar deck and a plurality of second spring elements extending in one direction from said deck and terminating in distal end portions, said second spring elements each outlining an inside cavity having a cross sectional area parallel to said second deck which increases progressively from said distal end portions to said second deck and each inside cavity being open at said second deck whereby a plurality of said second half units may be stacked together with the spring elements of one of said second half units being nested into the spring elements of the half unit therebelow;
• and
• means at the distal portions of said first and second spring elements for joining said first and second half units together with said second half unit being inverted relative to said first half unit and with said the spring elements of one half unit extending toward the deck of the other half unit thereby forming said wire spring assembly with spaced first and second decks, said joined spring elements forming single combined springs between said decks.

A half unit of a wire spring assembly comprising:

• a generally rectangular border wire having spaced opposite sides;
• a plurality of spaced lacing wires extending between two of said spaced opposite sides of said border wire along generally parallel paths, said lacing wires together with said border wire forming a generally planer deck;
• a plurality of first and second spring elements extending in one direction from said deck between adjacent spaced lacing wires and connected to said deck by said lacing wires, said first and second spring elements terminating in first and second distal end portions respectively spaced from said deck;
• and
• complementary joining means at the distal end portions of said first and second spring elements for joining one of said first spring elements to one of said second spring elements with said second spring elements being inverted relative to said first spring elements, and said first and second spring elements being arranged on said deck so that when a first half unit is inverted relative to a second identical half unit, and the distal end portions of said first and second spring elements of said first and second half units are brought together, a first spring element of said first half unit is aligned with a second spring element of said second half unit whereby said two half units can be joined together by said joining means at the distal end portions of said first and second spring elements thus forming a wire spring assembly with spaced decks and with the spring elements of said first half unit being joined to the spring elements of said second half unit forming combined springs extending between said decks.