Abstract: A watermattress includes a outer bladder for retaining water and an inner chamber assembly for inhibiting wave motion within the bladder. The chamber assembly includes a first chamber disposed generally vertically with respect to a second chamber. The walls of the respective chambers form a passage which permits a flow of water from the first chamber to the second chamber thereby providing the chambers with different collapsed characteristics. The top chamber may have relatively fast collapse characteristic providing a soft sitting surface while the second chamber can have relatively slow collapse characteristics to more significantly retard the downward movement of a person sitting on the mattress.

Abstract: A hybrid watermattress has a compressible sidewall, a water fillable bladder, and a cover to envelope the bladder and the sidewall. The sidewall extends laterally and peripherally of the bladder, and in an uncompressed state, has a generally concave cross section that is complementary to the lateral panels of the bladder.

Abstract: A mattress construction includes a watermattress bladder or inner spring mattress subassembly which is enclosed in a quilted mattress cover. This cover typically includes an outer fabric, a backing and an inner fabric which are quilted together. The outer fabric is colored and typically provided with a pattern or indicia. The fabric itself consists of a loose weave of threads providing openings or interstices in the fabric. The backing, typically formed of foam or fiber, is provided with pigments which are visible through the interstices of the fabric and provide a background color for the color in the fabric. In this manner, the pigments in the backing material enhance the distinct images of the indicia and add to the depth and richness of the mattress color. This provides the mattress cover with substantially colorfast characteristics increasing its chroma and color quality to provide an attractive, long lasting, appealing appearance.

Abstract: A mattress includes a resilient member having an original size and shape and properties for compressing under the weight of a person lying on the mattress to a second size and shape. A mattress cover enveloping the resilient member includes a top panel having a memory fabric with particular stretch characteristics for expanding to the second size and shape when the person is lying on the mattress, and particular retention characteristics for returning to the original size and shape when the person is removed from the mattress. The memory fabric is especially desirable in avoiding the "hammock effect" in hybrid watermattress constructions.

Abstract: A water mattress includes an outer bladder for retaining water and an inner chamber assembly for inhibiting wave motion within the bladder. The chamber assembly includes multiple chambers each having a bottom sheet and a closure sheet, and the bottom sheet being deformed to provide the bottom and sides of the chamber. Adjacent chambers are joined along a single seam to form the chamber assembly. In a preferred method, the bottom sheet is heated and drawn into a vacuum form where it is cooled to permanently deform the sheet into an integral, multiple chamber, seamless configuration.

Abstract: A water mattress includes an outer bladder for retaining water and an inner chamber assembly for inhibiting wave motion within the bladder. The chamber assembly includes multiple chambers each having a bottom sheet and a closure sheet, and the bottom sheet being deformed to provide the bottom and sides of the chamber. Adjacent chambers are joined along a single seam to form the chamber assembly. In a preferred method, the bottom sheet is heated and drawn into a vacuum form where it is cooled to permanently deform the sheet into integral, multiple chamber, seamless configuration.