Mattress having a core of pocketed springs.

The invention relates to a spring mattress comprising a plurality of contiguous, encapsulated coil springs, each coil spring in a closed bag made of fabric, plastic or the. Like. Arranged and ordered that closed bags in one direction than panels together hanging and transverse to the direction the bands are connected by bonding. The invention can be applied to a variety of types of coil springs, for example in cylindrical springs, barrel springs or even at waist springs. Such pocket spring mattress is an innerspring construction, so a coherent structure of pocketed coil springs, which is a component of a complete mattress and which is completed in accordance with upholstery and cushions and a coat.

A pocket spring mattress of the type described above is known from EU-A 154 076. Here, too, bands or rows are formed from closed bags, in each case a coil spring is housed. The bands or rows are transverse to the band or row direction connected to one another, characterized in that an adhesive based on a tangential line of the bag or to the tangential lines of the pockets in a series is applied and the pockets of the adjacent row to the line of contact or the contact lines are pressed. Thus, a field arrangement of the individual bags is possible, therefore, such an arrangement in which the axes of the interconnected pockets or coil springs are each arranged at right angles to each other. The adhesive can be carried out in individual strips or even individual points and combines the material of the pockets transversely to the direction of the bands directly among themselves. For this purpose, the pockets of adjacent rows have to be pressed together and there is a certain amount of setting time required to cure the adhesive bond. However, the arrangement of the adhesive application is limited to a relatively small linear region when z. B. Two rows of pockets encapsulated cylinder springs pressed together are kept. Even shorter in height, this area is in the use of barrel springs. This then results in a reduced cohesion of the springs to each other and a relatively low dimensional stability of the entire mattress. In addition, the pressing of the adhesive applied to the pockets to each other is problematic in that the material of the pockets between the support points by hanging on the turns of the coil spring can be deformed or einbauchend.

US Patent 2,805,429 shows a pocket spring mattress of a plurality of contiguous, encapsulated barrel springs. To connect the bands or rows of barrel springs transversely to each other, it is proposed to connect threads which are passed transversely through pockets in all bands or rows. These threads are knotted at the ends hanging out on both sides of the pocket spring mattress with one another. The filaments are in this case passed through the pockets of adjacent rows that alternately a transition region between two pockets is penetrated, while immediately adjacent to the connecting thread reaches through the movement space of the coil spring. It is there already recognized as disadvantageous that needles flying the filaments as they pass through the mattress, can break off contact with the coil springs, so that it is proposed to pass to pull the threads during the return stroke of the needles through the pockets of all adjacent bands. In any case, the threads used hinder the free movement of the coil springs. On the other hand cause continued movement of the coil springs to a fraying of the connecting threads, whereby the cohesion in the transverse direction is lost.

Also, U.S. Patent No. 3,230,558 shows such a pocket spring core mattress with continuous connecting yarns over the entire width of the mattress. Here too, adjacent pockets are on the respective through connecting thread impaled bzw.von this penetrated.

The invention is based on the object, starting from a pocket spring mattress of the kind mentioned the cohesion of rows or strips of bags to improve transverse to the direction of the bands. In this case, the production is to be simplified and disadvantages are excluded, which are caused by the shape of the respective coil springs.

This is inventively achieved in a spring mattress of the kind initially described characterized in that a connecting wall is provided made of an elastic material parallel to the direction of the tapes between each two adjacent bands, and that the pockets of the ribbons are bonded indirectly to each other via a respective connecting wall. Such indirect bonding can be - as opposed to a direct bond - much safer to perform, because the connecting wall of elastic material can be better and more intensively bring to the wells of the adhesive into contact. Moreover, can be advantageously made through the intermediary of the connecting walls of the elastic material influence on particular desired characteristics of the mattress. the risk of fraying or mutual entanglement is advantageously reduced when the spring breaks, because the connecting walls but also by supplying again the fact that the coil springs can not directly contact each other transversely to the direction of the bands.

The connecting walls are suitably provided on the amount of coil springs in pockets throughout and may have an outline of the coil springs cross section adapted. Thus, the adhesive application, while still only in a line capability. This area is comparatively extended because of the flexibility of the connecting walls, a good contact to the pockets of the coil springs is possible.

If the connecting walls are formed at least profiled in the longitudinal direction, adapted to a part of the circumference of the coil springs, the area in which the application of adhesive can be carried out also in the direction is significantly extended transversely to the axis of the coil springs. In addition, the profile of the connecting walls is also beneficial in that each coil spring is thus also maintained and secured in place.

The connecting walls can be made of foam, ie made of foamed plastic, which can be adjusted to the desired elasticity in the other, so that therefore the properties of the pocket spring mattress are generally positive influenced.

The bond can consist of multiple distributed two-dimensionally arranged adhesive dots. It can be strip-shaped and applied. Here the person skilled in open different implementation options.

The method for producing such a pocket spring mattress is characterized according to the invention in that the pockets of the ribbons are indirectly bonded together by the bands are glued directly each with a connecting wall. This Although increasing the number of adhesive dots. Every single spot of adhesive is produced but with greater safety and easier because the elastic resilience of the material of the connecting wall is this skillfully exploited.

It is possible to bond a tape having a first connecting wall and then to allow a partition to follow sections of band and connecting wall and finally to bond the sections together in the same direction. This allows an efficient production. Suitably, the adhesive is applied to the material of the connecting wall, and not on the material of the bags.

The invention is further explained and described with reference to preferred embodiments. Show it:<ul><li>Figure 1 is a plan view of a part of a spring mattress in a first embodiment,</li><li>2 shows a section along the line II-II in Figure 1,</li><li>Figure 3 is a similar sectional view as Figure 2, but with the use of barrel springs,</li><li>Figure 4 is a sectional view taken along the line IV-IV in Figure 1 illustrating the adhesive dots,</li><li>Figure 5 is a view similar to Figure 4 in a different arrangement and configuration of the adhesive dots,</li><li>6 shows a plan view of a further embodiment of the pocket spring mattress,</li><li>Figure 7 is a sectional view taken along the line VII-VII in Figure 6 and</li><li>Figure 8 is a similar sectional view as Figure 7, but in a further embodiment.</li></ul>

1 shows a corner of a pocket spring mattress is shown. Each alternately are bands 1, 2, 3, 4 disposed of pocketed springs are being formed from fabric, nonwoven o. The like. Together hanging pockets 5, which are finished with a longitudinal seam 6, each transverse seams 7 from each other, but concatenate. In each pocket 5 a coil spring 8 is encapsulated. This formation of the tapes 1, 2, 3, 4, etc., corresponding to the conventional art.

Between adjacent bands and also at the beginning and at the end of a connecting wall in each case 9 made of an elastic material, such as foam, is provided, wherein the connecting walls 9 (Figure 2) over the height of the coil springs 8 and of the pockets 5 are provided continuously. The width of the connecting walls 9 may be a fraction of the diameter of the coil springs eighth Between the material of the pockets 5 and the connecting walls 9 a plurality of individual adhesive dots 10 are formed, which is preferably done by an adhesive to the connecting walls 9, against the strips of pockets 5 are held with the time required for curing. Due to the flexibility of the material of the connecting walls 9 a good surface contact is in the field of adhesive dots 10 provided so that the connection is secure and reliable occurs in the area of ​​all adhesive dots 10th It should be understood that in this embodiment an approximately linear contact between the coil springs springs designed as a cylinder 8 and the connecting walls 9 occurs, so that the adhesive dots 10 have to be placed accordingly. The connecting walls 9 according to figure 2 have rectangular cross section, which is provided continuously constant over its length.

Figure 3 shows an embodiment in which the coil springs 8 are formed as barrel springs. Again, the connecting walls 9 have constant continuous over their length cross-section which, however, is concave, in order in this way the area in which the adhesive dots 10 may be arranged to enlarge. As can be seen, the adhesive dots 10 may be even arranged in the region of the first and last turn of coil springs 8, which was previously not possible in the direct bonding of the pockets 5 of coil springs 8 as barrel springs.

Figure 4 again illustrates the arrangement of adhesive dots 10 for the embodiment of Figure 3. In Figure 5, it is also possible to bond to focus on the central region of the barrel springs and here the glue spots in strips, namely the adhesive strip 11 to apply or to arrange.

The embodiments of Figures 6 to 8 show a basically similar structure, but here the connecting walls 9 are profiled in its longitudinal direction, ie, they have varying cross sections here. In this way a better adaptation to the shape of the coil springs over a larger peripheral area is possible and the zone within which the glue dots 10 or tape 11 can be arranged, is considerably greater, ie it is a comparatively large area available, within the the adhesive dots 10 can be placed almost at will. Such zones 12 are highlighted in Figures 7 and 8. FIG. The demonstrated profiling of the connecting walls 9 in the longitudinal direction, it also provides, as it also has a form fit to the pockets 5 and the encapsulated therein coil springs 8 so that each coil spring 8 are held and secured in accordance with not only through pockets 5, but additionally also by the profiling the connecting walls. 9

The pocket spring mattresses of the indicated type can be easily and cost-effectively. The adhesive dots 10 or adhesive strips 11, z. B. in the form of a hot melt adhesive, mechanically expelled by the nozzle of a corresponding adhesive application machine and get it to a continuous strip of the connecting wall 9. Subsequently, an endless belt 1 composed of contiguous bags 5 with pocketed coil springs 8 asserted, until the connection and curing has taken place. This double band is then divided into strip portions, again - in particular the material of the connecting wall - additional adhesive dots 10 or strips 11 are applied. The sections are then held together shortly before also here the curing is carried out, whereby a good contact due to the resilience of the material of the connecting walls 9 is obtained.

LIST OF REFERENCE NUMBERS

<ul><li>1 = band</li><li>2 = tape</li><li>3 = tape</li><li>4 = Volume</li><li>5 = Bag</li><li>6 = longitudinal seam</li><li>7 = transverse seam</li><li>8 = coil spring</li><li>9 = connecting wall</li><li>10 = gluepoint</li><li>11 = tape</li><li>12 = Zone</li></ul>