Heat welding nozzle for sealing flooring seams

A heat and sealant delivery nozzle for melting and delivering sealant into a seam between exposed surfaces of adjacent sheets of flooring comprising a sealant heating member defining a hollow, straight sealant delivery tube oriented with a linear alignment and inclination relative to said exposed surfaces of said sheets of flooring and having an upper sealant inlet opening and a lower sealant dispensing opening, a hot air conducting member having a hot air inlet connected to a hot air supply and a linear seam preheating contact edge located behind said sealant dispensing opening of said sealant delivery tube and a plurality of seam preheating ports are defined in said seam preheating contact edge of said hot air conducting member, and said seam preheating ports are arranged in straight, linear alignment with each other and with said sealant dispensing opening, and said sealant feeding member and said hot air conducting member are formed as separate structures that fit together and are secured together in mating fashion to define opposing sides of first and second internal plenum chambers, said first plenum chamber is located directly above said preheating contact edge and said seam preheating ports are located downstream from and in hot airflow communication with said first plenum chamber and said first plenum chamber is located downstream from and in hot airflow communication with said hot air inlet, and said second plenum chamber is located adjacent said sealant delivery tube which forms a barrier between said second plenum chamber and sealant within said sealant delivery tube, and a sealant preheating hot air delivery duct is defined in said hot air conducting member leading from said hot air inlet to a sealant preheating port located above said sealant inlet opening and physically isolated from both said first and second plenum chambers.

A heat nozzle for a handheld floor seam to sealing device comprising:

• a sealant heating member and a hot air conducting member initially formed as separate structures and both of which have flat, mating surfaces, and said flat mating surface of at least one of said members is configured with plenum cavities having a plenum side recessed from said flat, mating surface thereof, and said sealant heating member and said hot air conducting member are secured together so that said flat, mating surfaces reside in face-to-face contact with each other, whereby said hot air conducting member and said sealant heating member together delineate first and second hollow plenum chambers therebetween, and said hot air conducting member has a hot air inlet end with a plurality of internal inlet air ducts including a first inlet duct leading from said hot air inlet and to said first plenum chamber and said hot air conducting member has a linearly elongated floor contact edge with forward and rearward extremities located opposite said hot air inlet end, and a plurality of the internal seam preheating passageways are formed leading from said first plenum chamber to said elongated floor contact edge, whereby said seam preheating passageways terminate in a plurality of separate air exhaust ports lying in a straight line along the length of said elongated floor contact edge, and said sealant heating member has a structure with a linear sealant heating channel defined therethrough isolated from both said first and second plenum chambers and terminating in opposing sealant inlet and sealant outlet openings, and said sealant outlet opening in said sealant heating member lies adjacent to and is linearly aligned with said straight line of internal air exhaust ports in said hot air conducting member and with said forward extremity of said floor contact edge, a second air inlet duct is formed leading from said hot air inlet end to said second plenum chamber, and said second plenum chamber is isolated from said sealant heating channel by said structure of said sealant heating member, and a sealant preheating duct is defined within said hot air conducting member leading from said hot air inlet end and terminating at a sealant preheating port adjacent and above said sealant inlet opening in said sealant feeding member.