Water mattress and method of attachment of damper bladders

Details Water mattress and method of attachment of damper bladders Water mattress and method of attachment of damper bladders

A - Human Necessities

47

C

360/1, 26/199

A47C 27/08 (2006.01) B29C 65/00 (2006.01) B29C 65/04 (2006.01)

Patent

CA 1094699

WATER MATTRESS AND METHOD OF ATTACHMENT OF DAMPER BLADDERS ABSTRACT OF THE INVENTION In a water mattress, a series of interior bags or bladders are individually attached to the top and bottom layers in order to damp the movement of water. Each bag or bladder comprises a pair of disks peripherally heat sealed together. The disks are respectively heat sealed to the top and bottom layers. The improvement consists of a method of attachment of the bags or bladders to the top and bottom layers. A removable floating ring die is inserted between the companion disks. Large area dielectric plates close about the disks and ring die. Seals are achieved with very little distortion of the top and bottom mattress layers. The floating die is removed. The process is repeated until all the bags or bladders are attached. The strength of the top and bottom layers is not significantly impaired by the welding process, since no localized stress regions are created there. The hazard of leakage is largely eliminated. -1-

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