Abstract: A tire for a wheelchair wheel or the like in the form of a composite extrusion comprising a relatively soft, elastomeric casing extruded over a semirigid core. End faces of a length of extruded stock are joined by thermal fusion developed by a ferromagnetic element inserted in the tire and exposed to high frequency electromagnetic radiation.
Abstract: A closure for a panel hole which includes a heat activatable gasket that permanently expands into positive fluidtight sealing engagement with opposed marginal surfaces of the panel and a rigid closure plate.