Abstract: An electrical heating conductor having a resistance wire core and a high temperature-resisting, electrical insulation layer on top of the core, further having a multi-wire layer as a protective conductor, is improved by a layer of a wrapped foil made of a mechanically high strength material such as a polyimid or a polyether ketone or a derivative of either, and wrapped underneath or above the protective layer in order to protect the insulation layer against impacts and squeezing; the foil may be covered with a fluoropolymer coating for chemical protection; the multi wire layer includes a threaded-through high strength thread to hold the foil against the insulation underneath.

Abstract: A respiratory or respiration hose is made of a transparent or translucent material, e.g. a silicon caoutchouc, the hose has a helical, preferably hollow ridge or bar on its outer surface bonded thereto by a silicon based adhesive; heating conductors means are arranged on a foot portion of the ridge, on one or both sides of the foot portion of the ridge and are adhesively bonded to the hose; a return conductor may run through the hollow ridge interior; heating current is fed to the heating conductor which is provided in parallel or serial connection.

Abstract: A ribbon, preferably made of polytetrafluoroethylene and preferably in an unsintered configuration but having lens or trapezoidal cross section is used for wrapping elongated stock such as electrical conductors, tubes, or a removable mandrel, the wrapping to be made with overlapping edges followed by fusion to obtain a coherent tubular configuration.

Abstract: A flexible heating element is suggested to be made on a continuous basis, so that desired length can be cut therefrom and includes individual, electrically insulated feeder lines and a heating being interlooped in interweaving fashion with the feeder lines, there being discrete locations of the feeder lines from which the insulation has been removed for making contact with the heating conductor for supplying power thereto.

Abstract: A sleeve, terminal body, plug body, or the like receives tubular or ring-shaped, normally solid but thermoplastic filler elements, being traversed by a cable or conductor, particularly a portion from which insulation has been stripped. A plunger-like element receives also the cable or conductor and is inserted in one end of the sleeve, or body, the other end being closed by another plunger or body structure. Upon heating, the filler element melts and the plunger or plungers are forced further in to cause melted filler material to fill all voids; the deformed material resolidifies and seals and bonds all parts together.