Thermally welded spring pockets
AssigneeSimmons Company
InventorWalter Stumpf
Life of this patent
Estimating the term…
Abstract
Individually pocketed upholstery springs for assembly into so-called Marshall construction, in which the pockets containing the individual springs are formed between the overlaid plies of a two-ply strip of material by lines of separate individual welds which connect the plies together.
Claims5
In a series of pocketed springs for use in the manufacture of mattresses or cushions or the like comprising a strip of integrally-connected closed fabric pockets each containing a helically coiled wire compression spring having its axis disposed transversely of the strip, and wherein said pockets are defined between two overlapped plies of fabric strip by spaced transverse lines of discrete attachments of the plies to one another and by connection of said plies together along spaced longitudinal lines, the improvement wherein said fabric is thermally weldable to itself and said discrete attachments are spaced individual welds.
Dependencies are inferred from the claim text.