Abstract: A foldable bed is movable between an unfolded position, in which interconnected seat, cavity, and body sections are substantially horizontally aligned and of substantially uniform depth, and a folded position, in which the body section is horizontally disposed, the seat section is horizontally disposed and overlies said body section, the cavity section is generally upright and extends between the body and seat sections. In the folded position, the seat section of the mattress is collapsible, and the cavity section of the mattress is noncollapsible. The bed frame can include a leg that is spaced away from the frame in the folded position that compresses a mattress head section, thereby forming spaced within which collapsible springs of the seat section can reside. The bed can include springs having upper, intermediate, and lower runs, wherein the upper and lower runs include offset portions extending in opposite directions that are generally orthogonal to a plane defined by the spring intermediate run.

Abstract: A runner wire useful with collapsible springs includes a plurality of generally parallel and generally aligned runner sections and at least one offset portion. The offset portion merges with and extends from an adjacent pair of runner sections and includes a pair of parallel, rectilinear wire segments that extend generally perpendicularly from the runner sections and a loop connecting the pair of wire segments. The loop extends away from the wire segments within a plane defined by the runner sections and the wire segments in a direction that is nonparallel relative to the wire segments.

Abstract: A box spring for supporting a bedding matress. The box spring includes a rectangular base frame, a plurality of modular spring elements mounted atop the base frame, and a wire grid mounted atop the modular spring elements. Each of the modular spring elements comprises a horizontal straight center section terminating in horizontal plane curved end sections, at leat some of the curved end sections having single revolution coil springs extending vertically downwrad therefrom. The modular spring elements are arranged in parallel rows with adjacent spring elements of each row having alternatingly aligned straight center sections and adjacent modular elements within each row having a space between the curved end sections of the elements. The curved end sections of the modular spring elements are snap-fitted into upwardly open offset hooks in transverse wires of the wire grid.

Abstract: A box spring grid which includes coil spring engaging ears and a plurality of support wires secured to the grid and each including an ear. The ends of each support wire may be reversely bent around one end coil of a coil spring. Also disclosed is a method of manufacturing a box spring support grid wherein ears are formed in all longitudinal wires, between each pair of transverse wires, and, subsequently, selected portions of certain longitudinal wires are removed.