US2129038A - Mattress and spring assembly therefor - Google Patents

Description

Sept. 6, 1938. A. J. SCHOB 2,129,038

MATTRESS AND SPRING ASSEMBLY THEREFOR Filed July 22, 1956 2 Sheets-Sheet l Sept. 6, 1938. A, J. sci-10B 2,129,038

MATTRESS AND SPRING ASSEMBLY THEREFOR Filed Ju1y..22, 1,956 l 2 sheets-sheet 2 Patented Sept. 6, 1938 UNITED STATES PATENT OFFICE MATTRESS AND SPRING ASSEMBLY THEREFOR corporation of Illinois Application July 22, 1936, Serial No. 91,835

2 Claims.

The present invention relates to that type of mattress or cushion into which there is incorporated a spring assembly to which pads or sisal or other suitable fibre are secured before the said assembly is incorporated into the completed structure.

The particular type of mattress or cushion to which the invention relates is that wherein layers of Vpadding material are disposed over the first-mentioned pads, cover ticks are disposed over the second padding layers, and a boxing strip is then disposed peripherally of the padded structure, and is then secured along its top and bottom edges to the peripheral edges of the cover ticks.

In structures of this type or produced by the method outlined above, it is extremely desirable that means be provided for attaching the cover ticks and boxing strip to the spring assembly by the same operations whereby the boxing strip is secured to cover ticks. It is also desirable that the structure be provided with means for preventing the second-named padding material from finding its way into the space between the boxing strip and the opposed marginal portions of the spring assembly and, at the same time, enable more of said padding material to be disposed over the marginal portion of the rstmentioned padding to provide what is known as a roll-edge effect in the completed structure.

The main object of the present invention is', therefore, to provide simple and cheap means for accomplishing the above-defined purposes as fully described hereinafter. Alternative embodiments of the invention as applied to a wellknown type of mattress or cushion are illustrated in the drawings, wherein:

Fig. 1 is a fragmentary plan view of a spring assembly constructed in accordance with this invention.

Fig. 2 is a fragmentary detail vertical sectional View of the same on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary detail vertical sectional View on an enlarged scale similar to Fig. l, but showing the marginal edge portion of the spring assembly in completed state.

Fig. 4 is a fragmentary detail vertical sectional view of a mattress or cushion embodying the invention.

Fig. 5 is a fragmentary plan view of the lower wall of a spring assembly constructed in accordance with the invention and illustrates an alternative embodiment thereof.

Fig. 6 is a sectional view of the same on the line B-S of Fig. 5.

Fig. 7 is a fragmentary detail vertical sectional view of an edge portion of the spring assembly in its completed condition.

Fig. 8 is a fragmentary detail Vertical sectional View of a completed mattressl containing a spring assembly of the type illustrated in Figs. 5, 6 and 7.

In the instance illustrated, the spring assembly is made up of the ordinary upholstery springs I, the terminal coils of which are introduced into flat pockets 2 formed between two sheets of fabric 3 andll, respectively, such as burlap or the like. These flat pockets are formed by stitching together the said sheets of fabric by means of stitch chains 5 and 6 extending transversely to each other as shown in Fig. l.

A layer 'l of padding material overlies the top sheet 3 and is secured to both said sheets 3 and 4 by means of said vstitch chains 5 and 6. The fabric sheets 4 are equipped with openings 8 substantially centrally thereof, through which the terminal coils of the springs I are introduced into said pockets.

The marginal portions of the fabric sheets 3 and project an appreciable distance beyond the marginal stitch chains 5 and 6 of the structure and form what may be termed loose naps or flanges 9.

In passing the marginal stitch chains 5 and 6 through the padding layer 'l and the sheets 3 and 4, they are also passed through an edge portion of a strip ill of a suitable fabric, as shown particularly in Fig. 2. After the stitching aforesaid has been completed, the said free flaps or flanges 9 extending peripherally of the top and bottom wall structures of the resulting spring assembly, and after the springs l have been secured in place, as above described, the said free flaps or flanges 9 are folded over as shown in Fig. 3 to underlie the flat marginal pockets of the structure, the fold being made substantially along the marginal stitch chains 5 and 6. Rivets il, or other fastening devices, are then passed through the said flaps or flanges 9 and through the superimposed and underlying portions of the sheets 3 and 4 and the padding layers 'l to hold said flaps or flanges as shown in Fig. 3. This causes the strips lll of fabric to project from the marginal edges of the spring assembly substantially as shown in Fig. 3.

To complete the mattress, a further layer l2 of suitable material for padding is disposed over the padding layers l. The cover ticks I3 are laid over the padding layer I2 and a boxing strip i4 of any suitable type is then disposed peripherally 55 of the spring assembly. The marginal edge portions of the cover ticks I3 and the upper and lower edges of the boxing strip I4 are then brought to lie against opposite faces of the outer edge portions of the strips I0 of the fabric and the three margin edges thus disposed in contact with each other, as shown particularly in Fig. 4, are then enclosed in a strip I5 of tape and stitch chain or stitch chains I 6 are then passed through the tape and said marginal portions of the cover tick and boxing strip and the strips I0 of fabric to secure all of the same together.

The fabric strips IIB constitute a means for preventing padding material I2 from becoming disposed between the boxing strip I4 and the springs of the spring assembly. The padding material i 2 is thus confined peripherally and in order to stiffen the marginal portion of the mattress to produce substantially the effect of a roll-edge, commonly formed in mattresses, the larger volume of the padding material I2 may be crowded against the strips Id along the marginal edge portions of the padding layer 1.

In many instances, a layer of long fibre padding material, such as sisal bre, having stitch chains similar to the stitch chains E and 6 passed through the same, is disposed directly upon the springs of an all-metal spring assembly for upholstery,

' of which there are many conventional types.

Said padding layers are usually secured to the marginal springs of such spring assemblies by stitching or otherwise.

In pursuance of th-e present invention, strips of fabric, similar to the strips i5, may be secured to such sisal fibre padding by means of the marginal stitch chains corresponding to the marginal stitch chains 5 and of Fig. l and the free or flap portions of the said fibre layer will then be folded over similarly to the layer 'I, as shown in Fig. 3, thus disposing the marginal fabric strip I substantially exactly as shown in` Fig. 3. The remaining operations to complete a mattress or cushion are identical with those described above in connection with Fig. 4.

The structure of 'the present invention is advantageous in that there is practically no additional cost involved beyond the cost of the fabric strips IG, in providing the spring assembly with said peripheral strips i@ for use in completing assembly of the mattress.

The advantages incident to the employment of the strip 5E are not only that of confining the padding material I2, but also in connecting the boxing strip Id with the marginal springs of the assembly so that inthe handling of the mattress, as by grasping the corner portions, which include the tape edge it of Fig. 4, the boxing strip and cover ticks will not become displaced, nor will there be any relative movement between the strips i@ and the padding layer I2 which will tend to displace any of said padding material.

In the structure of Figs. 5 to 8 inclusive, the tapes or strips Il of suitable fabric are shown as secured to the lower face of the fabric sheet 4 by means of the marginal stitch chains 5, 6 which pass through the two fabric sheets 4 and 3 and through the layer 'I of fibrous padding material.

The only difference between the embodimentV of the invention illustrated in Figs. 1 to 4, inclusive, and that which is illustrated in Figs. 5 to 8, inclusive, lies in the position of the free edge portions Q of the top and bottom wall structures of the spring assembly, said portions 9 being folded over upon the padding layers 'I and then secured by means of fastening means II of any suitable type. The advantage incident to folding said free edge portions or flanges 9 upon the padding layers 'I is that the former build up a somewhat more rigid edge portion and reduce the amount of additional padding required to build up the marginal edge portions of the completed mattress as shown in Fig. 8 and reduces the danger of breaking down the substantial equivalent of a roll edge thus built up.

Obviously, the tapes or strips ID may be secured in place by stitch chains other than the stitch chains 5, 6 extending substantially coincidentally with the latter or very closely adjacent thereto, such stitch chains, if employed, being effective to strength-en the marginal edge portion of the spring assembly and the mattress.

As in the case of the structure of Figs. 1 to 4, inclusive, the tapes or strips I0 of the structure of Figs. 5 to 8, inclusive, may be secured to the marginal edge portions of fibre batts devoid of backing sheets and which, generally, are mounted upon all metal spring assemblies. In such instances the fastening means usually employed to secure the marginal edge portions of such batts to the outermost portions of the marginal springs of the spring assembly or to the metallic border elements thereof, such as border wire frames or helicals, may be passed through the said tapes or strips It to produce a more durable and satisfactory connection between the batts and the spring assembly.

I claim as my invention:

l. A mattress comprising a group of springs, pairs of fabric sheets between which the terminal coils of said springs are disposed, a layer of padding material dispose-d over the outer sheet of each pair thereof, relatively transversely disposed stitch chains joining the sheets of each pair and passing through and securing the padding layer thereto and cooperating with said sheets to form rectangular pockets between the same in each of which a terminal coil of a spring is conned, strips of fabric secured to the marginal portions of the inner opposed faces of the respective padded sheet structures by the marginal stitch chains of the latter and providing marginal flaps extending throughout the length and width of said padded sheet structures, the latter including marginal portions folded over inwardly into overlapping relation to the body portions of said sheet structures and also overlapping the marginal springs of the group, means securing the said marginal portions of said padded sheet structures in their said folded over positions and thereby leaving said marginal flaps secured to the outermost peripheral edges of the resulting spring assembly, a second layer of padding disposed over each of the first-named padding layers, a boxing strip disposed peripherally of said spring assembly, cover sheets disposed over said last-named padding layers, and stich chains securing said cover sheets and boxing strip to each other and to the outer edge portion of said iaps and constituting the sole connection between saidcover sheets and boxing strip.

2. A mattress comprising a conventional spring assembly, cover pads for same of greater length and width than said assembly secured to the latter and equipped with stitch chains extending laterally and longitudinally of same for retaining the component fibres of said pad against relative displacement, said stitch chains including marginal ones disposed substantially ush with the periphery of said spring assembly and spaced from the peripheral edges of said pad, strips of ginal stitch chains and secured in said folded position, said outer edge portions of said strips being adapted to be secured to and between the meeting edge portions of the boxing strip and cover fabrics of a completed mattress into which 5 said spring assembly is incorporated.

ANTHONY J. SCHOB.

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