초록 ▼

A waterbed contains a plurality of pliant plastic cylindrical containers, closed at both ends by end caps, one of which has a re-closable fill opening. In the preferred embodiment, the containers are fabricated by first extruding a polymer mixture into a tubular configuration and cutting to the desi

A waterbed contains a plurality of pliant plastic cylindrical containers, closed at both ends by end caps, one of which has a re-closable fill opening. In the preferred embodiment, the containers are fabricated by first extruding a polymer mixture into a tubular configuration and cutting to the desired length. One end of the tubing is framed by a support member in such a way that a portion of the end of the tube folds over the support member. The support member is constructed in a manner so that it may be disassembled into two sections. A flat end piece section is then placed over the assembly and the thus-formed end assembly is positioned within a support fixture such that the sealing end surface of the assembly is supported on the upper face of the support fixture. The fixture is then moved to a sealing area where an induction heater generates sufficient heat to heat seal the flat end piece to the end of the tubular member. After the seal is completed, the support member is moved within the tubular member to a position adjacent the other end of the tubular member and the previous steps are repeated to seal the other end. A fill opening is provided on the flat end piece section completing the seal so that the internal support member can be disassembled and the pieces removed through the fill opening.

대표청구항 ▼

In a fluid flotation sleeping surface construction having an interior cavity and wherein a plurality of separate liquid containers are adapted to be disposed within the cavity, the improvement comprising a plurality of liquid containers disposed therein, each liquid container comprising an elongated

In a fluid flotation sleeping surface construction having an interior cavity and wherein a plurality of separate liquid containers are adapted to be disposed within the cavity, the improvement comprising a plurality of liquid containers disposed therein, each liquid container comprising an elongated tubular member closed at both ends, each end having an end piece affixed thereto in sealing relationship, the elongated tubular member being seamless between its ends, each end of the tubular member being formed to establish a smooth, wrinkle-free surface to which the end piece is attached by resort to a disassembleable thin annular backing member constructed of at least two pieces which is positioned within the container, one of said end pieces defining a fill opening which is substantially smaller than the lateral extent of the annular backing member when it is assembled but through which the individual pieces of the backing member, when disassembled, may be removed.