Abstract: The invention relates to an MF expander spring 20 for a three-part oil scraper ring 2, 4, 6, 8. It comprises a steel band, which is corrugated in a trapezoidal or diamond-shaped manner in the axial direction, wherein the MF expansion spring 20 has axial protrusions 30, 32, which are intended to abut in each case against an upper or lower oil scraper ring 34, 36 from the inside in the radial direction, in order to press said axial protrusions outwards against an inner cylinder surface, comprises upper flat sections 24, which are intended to abut against an upper scraper ring 34, 36 of a three-part oil scraper ring 2, 4, 6, 8 in the axial direction, comprises lower flat sections 23, which are intended to abut against a lower scraper ring 34 of the three-part oil scraper ring 2, 4, 6, 8 in the axial direction, and comprises flank sections 26, 28, which extend between the upper flat sections 24 and the lower flat sections 22.

Abstract: The present invention offers a type of chair cushion and its supporting structure, and belongs to the technical field of chair manufacture. It solves the problem of unreasonable design in prior art. The chair cushion and its supporting structure comprise a pair of side boards and a bottom board. The undersides of the pair of side boards are provided at both sides of the bottom board to form a mounting cavity in which are provided several elastic supporting components. Each elastic supporting component includes several vertical springs of identical size and shape and a first flexible cladding. All springs in each elastic supporting components are arranged in at least one row and cladded in the first flexible cladding. The advantages of the chair cushion and its supporting structure lie in that the elastic supporting components formed by the first flexible cladding that clads at least one row of springs promote the strength for supporting person's hip weight on the seat.

Abstract: A method for packing a mattress spring bed includes: A. overlaying at least two mattress spring beds onto each other to form a mattress spring bed stack, the top side and the bottom side of the mattress spring bed stack are a mattress frame or a rigid support frame; B. placing the mattress spring bed stack into a sealing bag, then vacuuming the sealing bag, resulting in the springs of the spring beds being compressed; C. binding the mattress spring bed stack by strap. The mattress spring bed stack has a small volume, thus reducing the occupied space, increasing the transportation efficiency, and effectively reducing manufacture cost. In addition, the top side and the bottom side of the spring bed stack are respectively a mattress frame or a rigid supporting frame.

Abstract: An aspect of the present invention relates to a method and system of receiving information of a user's support facility comfort requirements; using a software application to determine a proper support facility firmness configuration to match the user's requirement; selecting foam springs with the proper user required firmness as determined by the software application; and configuring the selected foam springs within the support facility to match the user's firmness requirements.

Abstract: Disclosed herein is a method of making a spring core (12) for a bedding or seating product (10). The spring core (12) has coil springs (26) having unknotted end turns (72, 74) made from high tensile strength wire. In each embodiment, the end turns (72, 74) of the coil springs (26) are generally U-shaped having one arcuate leg (76) longer than the other (78), the legs (76, 78) being joined by a connector (80) having an arcuate bump (81) therein. The springs (26) are oriented in the spring core (12) such that a long leg (76) of one end turn (72) abuts a short leg (78) of the adjacent end turn (72) prior to being wrapped in helical lacing wire (32). The high tensile wire enables the coil springs (26) to be manufactured using less wire than heretofore possible.

Abstract: A spring wire support for foundations and innerspring mattresses, and a variable spring surface deck for a foundation and variable spring surface for a mattress. The spring wire support comprises an elongated spring element enveloped in a pliant carrier, with the carrier including an attachment margin. The variable spring surface deck for a foundation comprises a plurality of the spring wire supports secured as desired to an upper surface of a foundation. The variable spring surface for a mattress comprises a plurality of the spring wire supports located between top and adjacent convolutions of rows or columns of springs of the mattress.

Abstract: Disclosed herein is a bedding or seating product (10) having a spring core (12) comprising coil springs (26) having unknotted end turns (72, 74) made from high tensile strength wire. In each embodiment, the end turns (72, 74) of the coil springs (26) are generally U-shaped having one arcuate leg (76) longer than the other (78), the legs (76, 78) being joined by a connector (80) having an arcuate bump (81) therein. The springs (26) are oriented in the spring core (12) such that a long leg (76) of one end turn (72) abuts a short leg (78) of the adjacent end turn (72) prior to be wrapped in helical lacing wire (32). The high tensile wire enables the coil springs (26) to be manufactured using less wire than heretofore possible.

Abstract: Disclosed herein is a bedding or seating product (10) having a spring core (12) comprising coil springs (26) having unknotted end turns (72, 74) made from high tensile strength wire. In each embodiment, the end turns (72, 74) of the coil springs (26) are generally U-shaped having one arcuate leg (76) longer than the other (78), the legs (76, 78) being joined by a connector (80) having an arcuate bump (81) therein. The springs (26) are oriented in the spring core (12) such that a long leg (76) of one end turn (72) abuts a short leg (78) of the adjacent end turn (72) prior to be wrapped in helical lacing wire (32). The high tensile wire enables the coil springs (26) to be manufactured using less wire than heretofore possible.

Abstract: Disclosed herein is a bedding or seating product having a spring core comprising coil springs having unknotted end turns made from high tensile strength wire. In each embodiment, the end turns of the coil springs are generally U-shaped having one leg longer than the other, the legs being joined by an arcuate connector. The springs are oriented in the spring core such that a long leg of one end turn abuts a short leg of the adjacent end turn prior to be wrapped in helical lacing wire. The high tensile wire enables the coil springs to be manufactured using less wire than heretofore possible.

Abstract: A mattress or seating spring core assembly and method of manufacture which comprises interconnected rows of coil springs wherein each row terminates in a cut wire end which is bent inwardly into one of the end coils and in which the spring core assembly is surrounded on all sides by foam panels and is devoid of any border rods.

Abstract: A mattress spring structure (10) is provided with a strengthened central area (C) thereon to provide greater support for a user's body lumbar region when received thereon. The support is provided with a strengthening structure (30) having a continuous frame member (54) and a strengthening pattern (53). The continuous frame (54) encircles coil springs (12) over a major expanse of the mattress's central area (C); this frame is connected to mattress coils along the frames longitudinal (34, 36) and traverse (38, 40) segments. The strengthening pattern (53) has two metal bars (51, 52) arranged inside and connected to the continuous frame member (54). The strengthening pattern (53) may be connected to the spring coils (12) and contain additional metal straps (56, 59).

Abstract: A mattress spring structure (10) is provided with a strengthened central area (C) thereon to provide greater support for a user's body lumbar region when received thereon. The support is provided with a strengthening structure (30) having a continuous frame member (54) and a strengthening pattern (53). The continuous frame (54) encircles coil springs (12) over a major expanse of the mattress's central area (C); this frame is connected to mattress coils along the frames longitudinal (34, 36) and traverse (38, 40) segments. The strengthening pattern (53) has two metal bars (51, 52) arranged inside and connected to the continuous frame member (54). The strengthening pattern (53) may be connected to the spring coils (12) and contain additional metal straps (56, 59).

Abstract: A spring mattress including a number of interconnected coil spring elements, and a method of manufacturing the mattress. The spring mattress includes the coil spring elements that are interconnected by surface elements, such as strip pieces made from textile or plastic material and extending at least in one plane that is essentially in parallel with a plane of the mattress, with the strip pieces extending between and being attached to pairs of neighboring spring elements, thus interconnecting the spring elements.

Abstract: High and low profile mattress foundation frames have perimeter and transverse members, and upper members to which spring modules are attached to support a grid over the frame, to form a flexible support surface for a mattress. In a high profile version of the frame, transverse members are oriented with a major width perpendicular to a major width of the perimeter members, to provide structural rigidity and increased height to the frame. Low profile spring modules, such as the described composite material spring modules, supported by the high profile frame form a foundation which is comparable in overall height to conventional mattress foundations which use wire-form spring modules. In a low profile version of the frame, the major widths of the perimeter and transverse members are arranged parallel, and longitudinal members are supported by the transverse members.

Abstract: A device for connecting springs together to define a support surface includes four arms each which extend in an outward radial direction from a center of the connecting device, the length of each arm defined by two sides extending in spaced relation to one another. Each arm includes a stiffening portion extending in a widthwise direction between the sides of the arm and extending from an end thereof towards the center of the connecting device only partially along the length of the arm. The straight sides of each arm have identical height dimensions and the stiffening portion has a lesser height than the height of the sides. The sides and the stiffening porting of each arm together define a planar surface of the arm and a finger portion extends from the end of the arm to define with the planar surface a U-shaped recess for gripping a top coil of a coil spring.

Abstract: A mattress spring core having a plurality of zones of differing firmnesses due to different characteristics of helical lacing connectors within the particular zones. The spring core has a plurality of identical coil springs arranged in side-by-side transversely extending rows and columns. The coil springs are connected together at the upper and lower ends of the springs with helical lacing connectors which encircle a portion of the upper and lower faces of the springs. The helical lacing connectors may be of a heavier gauge wire in one or more zones of the mattress spring core thus causing that particular zone to be of an increased firmness relative to the other zones of the mattress. Alternatively, the helical lacing connectors within a zone may comprise two or more co-axial lacing wires to impart greater strength or rigidity to one or more zones of the mattress.

Abstract: A furniture seat spring assembly is presented which allows simplicity and economical seating for chairs, sofas or the like. The spring assembly comprises a U-shaped base having an eccentrically positioned coil spring which is covered with an elastic webbing. The eccentric position of the spring allows the user's weight to depress the webbing without "feeling" the coil spring which is positioned near the seat frame front rail. Multiple assemblies are positioned at selected intervals within conventional seat frames, depending on the particular frame size used.

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 a space 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 spring seating support system which includes an upper support frame that includes rigid wire grids located between adjacent rows of coil springs. The rigid wire grids are flexibly connected to the top loop of the coil springs located in adjacent rows, and are comprised of latitudinal perimeter wires welded to longitudinal support wires. Latitudinal interior wires welded to the longitudinal support wires may be added for additional strength where the distance between rows of coil springs requires such support.

Abstract: A box spring assembly having a support deck, a frame and support springs. The deck includes a border wire, long wires extending longitudinally and cross wires extending transversely. Support springs are mounted between the frame and the deck to yieldably support the deck above the frame. The support springs each include a pair of yieldable portions extending between the frame and deck and a deck attaching portion extending between upper ends of said yieldable portions. The deck attaching portion has end bars longitudinally extending from each of the yieldable portions and a cross bar transversely extending between the end bars. The deck attaching portion is configured to engage a cross wire of the deck in an interwoven fashion in response to axial movement of the entire support spring relative to the deck thereby clamping the spring module to the deck.

Abstract: A generally dish-shaped or conical-like head member with clips for securely engaging a typical wire grid used in cushions, seats, and bedding products is disclosed, as well as a similar member using cooperating lobe and trough pairs to hold a grid wire therebetween to fix a spring device in place.

Abstract: A spring wire core for use in bedding mattresses and/or upholstered furniture cushions and the like comprised of a pair of half units. Each half unit includes a surface portion and a plurality of springs projecting in one direction from the surface portion. Connecting elements are provided to enable a pair of half units, one inverted relative to the other, to be connected together forming a wire core with two spaced surface portions. Preferably, the spring portions are configured to enable a plurality of the half units to be nestably stacked one upon another to enable efficient shipping of the half units without compression of the spring portions.

Abstract: A drop-in spring assembly unit and method of manufacture of furniture. The assembly unit includes a plurality of spring elements coupled together by unique individual grid inserts, a wire base that may be customized to customer specifications and a border wire surrounding the top perimeter of the unit. The grid inserts are assembled prior to assembly of the drop-in unit and are coupled to spring elements by cushion clips.

Abstract: A spring and grid sub-assembly for use in furniture and box spring assemblies in which spring modules are attached to the wire grid through an attachment system in which the springs are in both an over-under relationship and a side-to-side interwoven relationship with the cross wires through plastic deformation of the cross wires whereby the springs can not be removed from the wire grid without plastic deformation of either the grid or spring modules. The resultant sub-assembly can be easily transported from a sub-assembler to a final assembler without risk of the springs being displaced or removed from the wire grid. Furthermore, spring clips are not needed for attaching the spring modules to the grid.

Abstract: A bedding spring is formed of a single piece of sinuous wire with a plurality of bars connected together by bends. A top portion of the spring includes two inboard bars and two outboard bars which connect the spring to a wire grid. The outboard bars lie below a grid wire, the inboard bars lie above the grid wire, and the inboard bars have localized bends which form downwardly facing notches for receiving the grid wire. The spring has a bottom portion formed of two spaced apart feet which are connectable to a horizontal platform, and a midportion formed of two downwardly diverging sinuous wire sections which connect the top portion to the feet. A bedding unit is made from a horizontal platform, a wire grid, and plurality of such springs which have their bottom portions connected to the platform and their top portions connected to the grid.

Abstract: An improved wire grid for connecting an array of coil springs in a box spring assembly includes perpendicularly-connected lengthwise-extending and widthwise-extending wires with the widthwise-extending wires arranged in sufficient number of possible groupings, each of three successively adjacent wires, spaced along the length of the grid to enable the grid to accept plural differing arrays of coil springs by utilizing varying combinations of the wire groupings for use of the grid without modification in box spring assemblies having differing spring-supporting base frame constructions.

Abstract: A spring assembly has a plurality of rows of springs interconnected in chain-like fashion, each spring including upper and lower runs and an intermediate run interconnecting the upper and lower runs. The upper and lower runs each include a coil on one end and a hook on the opposite end hooked about a coil of an adjacent spring. A plurality of runner wires extend transversely of the upper runs where they are connected thereto by a plurality of helical wires respectively received about the upper runs. The upper runs are in planes above the coils of the upper runs providing recesses above the coils receiving the helical wires.

Abstract: A spring loaded locking system for a box spring assembly having a generally rectangular frame, a plurality of spring modules and a grid type wire support deck disposed a predetermined distance above the frame. The locking system provides an interference fit which secures the spring modules to the support deck. Each spring has a pair of outwardly open V-shaped sections integrally formed with the upper portion of the spring. The vertices of the V-shaped sections commonly contact one wire of the support deck. A pair of legs extends from each vertex and straddle the common wire and either cross one of a pair of parallel brace wires of the support deck. The V-shaped sections are biased apart from each other by the shape of the upper portion of the spring module itself. The interaction between the vertices and the common wire, between the legs and the brace wires, and the outward bias of the upper portion of the spring module provides an interference lock fit which secures the support deck to the spring module.

Abstract: A box spring assembly comprises a horizontal rectangular frame, a generally horizontal mattress support deck disposed a predetermined distance above the frame, and a plurality of deck support springs arranged between the deck and the frame to yieldably support the deck. The deck includes a plurality of long and cross deck wires each having notches. The long and cross deck wires are oriented in a criss-cross fashion engaging each other at the notches, and a plurality of deck support springs having notched deck attaching portions engaged with the notched intersections of the wire members. At least one of the deck attaching portions includes a pair of end straight wire sections arranged in a side-by-side relation with a spaced pair of the deck wire members and arranged in a supporting relation with spaced portion of another one of the deck wire members that intersects the spaced pair interlocking the deck wire members and the straight wire section together.

Abstract: A spring interior comprising a plurality of longitudinally extending bands of springs disposed side by side and connected together by helical lacing wires in the top and bottom faces of the bands. Each band of springs comprises a single length of wire formed into a plurality of substantially vertical interconnected by interconnecting segments of wire coils of springs located alternately in the top and bottom faces of the bands. Each interconnecting segment comprises a longitudinally extending bridging portion and a transversely extending padding support structure. The padding support structure is angled upwardly away from the top face of the band and downwardly away from the bottom face of the band so as to impart initial softness and subsequent increased firmness to the spring interior when the spring unit is vertically compressed.

Abstract: A box spring assembly includes a base frame, a top wire grid and a plurality of formed wire springs interconnecting the top wire grid and the base frame. The formed wire springs each comprises a wire strip formed into an inverted U-shaped configuration with the closed end of each U-shaped spring generally Z-shaped and attached to the top wire grid by a snap-fit connection and the free ends at the bottom of the U-shaped spring being attached to the base frame.

Abstract: A box spring assembly includes a base frame, a top wire grid and a plurality of formed wire springs interconnecting the top wire grid and the base frame. The formed wire springs each comprises a wire strip formed into an inverted U-shaped configuration with the closed end of each U-shaped spring attached to the top wire grid by a snap-fit connection and the free ends at the bottom of the U-shaped spring being attached to the base frame.

Abstract: A box spring assembly includes a base frame, a top wire grid and a plurality of sinous wire springs interconnecting the top wire grid and the base frame. The sinuous wire springs each comprises a sinuous wire strip formed into an inverted U-shaped configuration with the closed end of each U-shaped spring attached to the top wire grid by a snap-fit connection and the free ends at the bottom of the U-shaped spring being attached to the base frame.

Abstract: A fluid containing mattress including exterior support in the form of side frames and a bottom support. Flexible, contractible bellows are distributed over the bottom support and are connected thereto. Tubing connects the bellows to adjacent bellows to permit fluid flow between them. A selected amount of fluid is provided in the bellows. A top cover including a cushion extends over the bellows. Coil springs are mounted on top of the bellows and support the top cover. Elastomeric members connect each coil spring to adjacent coil springs.

Abstract: A spring assembly wherein there is a rectangular border wire and there are coils disposed in spaced, parallel rows within the border wire. The coils in the rows of coils lap and are connected by helices of wire. The helices of wire connect the adjacent rows of coils, and the coils adjacent the border wire are connected thereto by a helix of wire.

Abstract: A spring element for bedding and furniture which can be constructed in a simple manner but will not tend to come apart in ordinary use. The spring element includes a laterally extending pair of parallel wires and a longitudinally extending pair of parallel wires atop the laterally extending wires. The pairs of wires are welded to one another at their crossing points to form a seat for engaging the open top loop of a coil spring, and the ends of the wires are connected to a framework. Each longitudinally extending wire has a depressed portion between the crossing points extending beneath the laterally extending wires. The top loop of the spring is snapped into engagement with the pairs of wires, so that the top loop is sealed above the depressed portions of the longitudinally extending wires and beneath the laterally extending wires and so that the top of the free end portions of the top loop is biased against the bottom of one of the laterally extending wires.

Abstract: A plurality of main springs and a plurality of intermediate support springs are arranged on a rectangular base plate. Each main spring is made of a single steel wire and consists of two coil portions and a straight rod portion connecting these two coil portions. The rod portions of the main springs are arranged at right angles, thus forming a lattice. One end of each coil portion is fastened to a frame. The other end of each coil portion is fastened to the base plate. Each coil portion is shaped like a cone, an inverted cone, a hourglass or a barrel.

Abstract: A body support such as a mattress, box spring or the like that is foldable between a use position wherein it extends in a generally horizontal plane and a storage position wherein one section overlies the other section. The body support includes a plurality of support members movable between erect and retracted positions in response to movement of the body support between the use and storage positions. One embodiment disclosed relates to a box spring and a second embodiment relates to a mattress. Also disclosed is a novel construction and arrangement of support members incorporated in the body support.

Abstract: A plurality of main springs and a plurality of intermediate support springs are disposed and fixed on a rectangular base plate. Each main spring has a linear connecting rod portion and two coil spring portions such that one end of each of the two coil spring portions is coupled to a corresponding one of two ends of the first linear connecting rod portion. The main springs are disposed such that these connecting rod portions are perpendicular to each other in a matrix form. The other end of each of the coil springs is fastened to the base plate. Each intermediate support spring has a connecting rod portion and two coil spring portions. The connecting rod portion of each intermediate support spring is shorter than that of each main spring. One end of each of the coil spring portions of the intermediate support spring is coupled to a corresponding one of two ends of the connecting rod portion of the intermediate support spring.

Abstract: A mattress for use on a bed and settee comprises a spring unit, at least one cushion, a protection layer arranged between the spring unit and the cushion, and an outer covering for covering these component members. The protection layer includes a frame located at the circumference and outside of the spring unit, and a net tensioned inside the frame, the protection layer being made of synthetic resin and having the frame and net formed integral thereto. The frame has a flange with which end turns of coil springs arranged in the spring unit and adjacent to the frame can be contacted. The frame of each protection layer provided with the flange has sufficient rigidity and serves as a reinforcing member.

Abstract: An inner spring assembly embodying a generally channel-shaped border wire of the type which is provided with a continuous groove with straight sides and into which the end convolutions of the helical bedsprings of the assembly project in tangential fashion and about which the border wire is crimped to form a loose self-aligning non-rigid interconnection between springs and border wire. The border wire is formed from solid rod-like wire stock by a cold rolling operation in a shaping mill thereby obviating the necessity of resorting to machining and heat treating and eliminating waste material that is a consequence of machining. The rolling operation includes a reshaping of the solid cylindrical stock to a grooved border wire that offers a greater bending strength than like diameter solid border wire of the like weight per unit length.

Abstract: A box spring assembly which includes a generally rectangular frame, a welded wire grid disposed above and aligned with the frame, a plurality of upwardly extending limited deflection wire springs which are mounted at their lower ends on the frame and at their upper ends are secured to the welded wire grid, and improved corner springs which are yieldable and are supported on the corners of the frame so as to support the corners of the grid. Each of the corner springs is a limited deflection spring formed at its upper end with an attaching portion that is readily secured to the grid by a conventional clip and including upright columns which will yield under load and which will also engage the frame to limit deflection.

Abstract: A spring assembly comprising a base frame, a grid frame, coils connected at their lower ends and upper ends to the respective frames wherein the grid frame is provided with crossing longitudinal and transverse wires so positioned as to enable spacing the coils transversely of the grid frame at a uniform spacing and wherein the longitudinal wires of the grid frame are provided with deviations for receiving diametral portions of the coils and retaining the latter from movement relative to the grid frame.

Abstract: An auxiliary panel (12) for a bedding unit (10) is disclosed as including a peripheral wire (24) on the load supporting surface of the unit and a plurality of torsion bar springs (30 or 42) extending between opposite portions of the peripheral wire so as to resiliently provide increased firmness. Distal end torsion bars of each torsion bar spring are connected to the peripheral wire to provide the cooperation therebetween during use. Different embodiments of the panel incorporate sinuous wire type springs (30) and formed wire type springs (42) extending both longitudinally between opposite longitudinal portions (26) of the peripheral wire as well as laterally between opposite lateral portions (28) of the peripheral wire.

Abstract: A box spring assembly which includes a generally rectangular frame, a plurality of upwardly extending wire springs mounted on the frame, and a wire grid supported on the upper ends of the springs so that the grid and springs cooperate to yieldably resist downwardly directed bedding loads. Each of the springs is formed at its upper end with an attaching portion that is structured so that it can be connected to the grid merely by moving it from an initial position to an interlocked position. This structure enables assembly of the grid and the springs without the requirement for the usual attaching clips.

Abstract: A mattress box spring and method of assembly comprising a plurality of substantially conical coil springs rigidly fastened at the spring ends of lesser diameter to a support frame such that the spring end coils of greater diameter lie in a substantially common plane, a wire mesh coated with elastomeric material overlying the end coils in the common plane with the spring end coils being unattached or free-floating with respect to the mesh and with respect to each other, and a cloth cover or pad disposed over the mesh and having a periphery attached to the frame to hold the assembly together. Preferably, the diameter of each spring end coil lying in the common plane is greater than the corresponding spring height. The coating on the wire mesh, which preferably is of latex material, provides enhanced frictional contact between the mesh and springs, and also deadens rattling between the opposing spring and mesh surfaces.

Abstract: A box spring assembly which includes a generally rectangular frame and a wire spring assemblage mounted on the top side of the frame; the assemblage including a large number of straight wires arranged criss-cross fashion and arcuate springs that support and connect the straight wires at some of the points of intersection. A basic wire grid is formed with downwardly extending hook portions that snap over some of the spring wires to secure the grid to the assemblage so as to bridge the spaces between the straight wires. The "spring back" capability of the spring wires allows them to spring into the hook portions so as to retain the grid in position.

Abstract: A mattress box spring and method of assembly comprising a plurality of substantially conical coil springs rigidly fastened at the spring ends of lesser diameter to a support frame such that the spring end coils of greater diameter lie in a substantially common plane, a wire mesh coated with elastomeric material overlying the end coils in the common plane with the spring end coils being unattached or free-floating with respect to the mesh and with respect to each other, and a cloth cover or pad disposed over the mesh and having a periphery attached to the frame to hold the assembly together. Preferably, the diameter of each spring end coil lying in the common plane is greater than the corresponding spring height. The coating on the wire mesh, which preferably is of latex material, provides enhanced frictional contact between the mesh and springs, and also deadens rattling between the opposing spring and mesh surfaces.

Abstract: A grid structure for engaging and supporting a plurality of coil springs in predetermined spatial relationships so that spring units and completed box spring foundation units can be produced having different numbers of coil springs and consequently different degrees of firmness. The grids are constructed in sizes approximating the dimensions of standard size box spring foundation units, and are formed from longitudinally and transversely extending groups of wires defining a plurality of generally rectangular seats arranged in rows and columns. The top coils of different numbers of coil springs can be engaged with and retained on selected seats in each row to provide the desired degree of firmness of the completed unit. The top coils are restrained against longitudinal and transverse shifting movement relative to their seats and the dimensions of the seats and top coils are such that the top coils can be mounted closely adjacent to each other without overlapping.

Abstract: A mattress having increased firmness in a preselected area on both sides of the mattress through use of a welded wire grid structure attached to the opposite sides of the mattress. In one preferred form, the increased firmness is provided only in a preselected area, e.g., the center one-third area of the mattress, by a welded wire grid while in another preferred embodiment, the grid wires extend over the complete area of the mattress. The wire grids are preformed and assembled as a separate subassembly and are attached to the preassembled spring core by conventional connectors, as for example, conventional hog rings.