A portable, handheld seam welding gun for filling in seams between sheets
of linoleum flooring is provided with a unique heat nozzle. The heat
nozzle of the invention couples the heating barrel of a conventional floor
seam welding gun to a conventional hollow welding tip by receiving the
heating air inlet tube of the tip within the confines of a downstream
socket formed in the body of the heat nozzle. A larger, upstream socket
formed in the body of the heat nozzle fits onto the heating barrel of the
handheld, portable welding gun. A plurality of preheating jets are formed
on the underside of the body of the heat nozzle to preheat the region of
the channel immediately to the rear of the welding tip just before molten
sealant flows into that portion of the channel.
