| 摘要 |
<p>The present invention relates to a spring mattress having two superposed layers of springs, which are enclosed in covers (4), and a method of manufacturing a mattress of this kind. Characterising features of the invention are that the springs of the upper layer are positioned essentially straight above the corresponding springs in the lower layer, and that the covers are joined together in such a manner that the springs in the lower layer are affected at least to some extent by the spring above, in the upper layer, independently of neighbouring springs.</p> |
