Double spring mattress and manufacturing process
AssigneeStjernfjadrar AB
InventorNilsEric Stjerna
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Abstract
The present invention relates to a spring mattress having two superposed layers of springs, which are enclosed in covers, and a method of manufacturing a mattress of this kind. The characterizing 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 neighboring springs.
Claims14
A spring mattress comprising:
- two superposed layers of springs, the two layers having an upper layer and a lower layer, and covers for enclosing the springs, wherein:
- the springs of the upper layer are positioned essentially straight above the corresponding springs in the lower layer, and in 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 neighboring springs.
A method of manufacturing a mattress having two superposed layers of springs, which springs are enclosed in covers, comprising the steps of:
- placing a piece of material between corresponding springs in the two layers,
- wrapping external ends of said material around the respective spring,
- joining said ends to the piece of material at the opposite side of the respective one of the springs, and
- attaching the piece of material along the longitudinal sides, i.e., in the longitudinal direction of the springs.
The method of manufacturing a mattress having two superposed layers of springs, which springs are enclosed in covers, comprising the steps of:
- enclosing a spring in an inner cover, and
- enclosing the inner cover with the spring positioned therein, as well as a corresponding spring in the second layer, in an external cover.
Dependencies are inferred from the claim text.