The present invention relates to an apparatus for securing couplings or fittings to the ends of hose of the type that has a smooth cylindrical interior and a spiral-reinforcing bead in conjunction with a more flexible hose body. The hand-held applicator has a gas delivery member adapted to deliver pressurized ionizable gas to the proximity of an electrode located adjacent a distal end of the applicator. Thus, the construction of the flexible printed board is simplified, and the entire display device can be made compact. The hot gas stream is then utilized to provide a significant part of the heat requirement for reduction, prior to exhausting into the atmosphere.