Sleeper sofa mattress
OwnerRobert K. Parkerinventor
Life of this patent
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Abstract
A sofa bed mattress is disclosed. The mattress may be extended to provide a sleeping surface, and may be folded about transverse flexure lines for storage within a sofa or other configuration. The sofa bed mattress includes an inner spring unit and an overlying top cushion. The top cushion is secured to the inner spring unit substantially along the transverse flexure lines so that the position of the top cushion relative to the inner spring unit is substantially maintained when the mattress is folded.
Claims16
A sofa bed mattress adapted to be extended flat to provide a sleeping surface and to be folded about transverse flexure lines for storage within a sofa, the sofa bed mattress comprising:
- a foldable inner spring unit including a plurality of uniformly-spaced rows of coil springs extending transversely across said mattress with adjacent rows of springs being connected by transversely-extending wires such that the flexure lines may be defined between any two rows of springs;
- a cover encasing the spring unit and including a continuous top cushion overlying the inner spring unit to provide a sleeping surface;
- each of said inner spring and said top cushion being of substantially uniform thickness;
- means for securing the top cushion to the inner spring unit along at least one line extending transversely of said mattress such that the position of the top cushion relative to the inner spring unit is substantially maintained when the mattress is folded, said connection of said top cushion to said inner spring unit overlying the junction of two adjacent rows of springs to define one of said transverse flexure lines.
A sofa bed mattress as claimed in wherein the securing means comprises:
- an elongated flange disposed under the top cushion and associated with two transverse flexure lines;
- a pair of transverse lines of stitching extending through the top cushion and through the flange to secure the flange to the top cushion, at each line of stitching while leaving a portion of the flange extending downwardly at each line of stitching, the pair of transverse lines of stitching being disposed substantially along the two associated flexure lines;
- and
- a plurality of clips securing the downwardly extending portions of the flange to the inner spring unit.
A sofa bed mattress having a head end and being foldable for storage within a sofa, the sofa bed mattress comprising:
- a foldable inner spring unit including a plurality of uniformly-spaced rows of coil springs extending transversely across said mattress with adjacent rows of springs being connected by transversely-extending wires such that flexure lines may be defined between any two rows of springs;
- a cover including a top cushion overlying the inner spring unit;
- elongated flanges disposed transversely to the top cushion and secured to the top cushion at transverse lines of stitching, each line of stitching extending through the top cushion, said flanges having downwardly-extending portions;
- and
- a plurality of clips securing the downwardly-extending portions of the flanges to the inner spring unit along transverse lines so that the position of the top cushion relative to the inner spring unit is substantially maintained when the mattress is folded, the connection of said downwardly-extending portions of the flanges to said inner spring unit overlying the junction of two adjacent rows of springs to define a transverse flexure line.
Dependencies are inferred from the claim text.