Heat welding accessories

Apparatus for sealing seams between adjacent sheets of flooring which define an upwardly facing, elongated groove where they meet comprising:

• a portable, hand-held seam welding gun having a body defining a longitudinal axis and a heat conducting member projecting therefrom along said longitudinal axis,
• a heat concentration nose mounted on said heat conducting member and including a heating tip mounting post projecting at an angle of at least five degrees from said longitudinal axis,
• a hollow heating tip disposed on said heating tip mounting post and including a welding rod tube leading down into a melting chamber, wherein said melting chamber has an open, downwardly facing, elongated dispensing mouth with front and rear extremities and said tip also defines a forwardly directed, upturned toe forward of said front extremity of said mouth and a heating duct extending between said melting chamber and an orifice located behind said rear extremity of said mouth,
• a mobile, stabilizing guide formed with a pair of laterally spaced outboard rollers and a seam follower located midway between said outboard rollers for following said elongated groove where said sheets of flooring meet, and
• a collar disposed about said welding gun body and coupled to said stabilizing guide by a releasable joint, thereby allowing said welding gun to be supported above said stabilizing guide at a selected orientation relative to said sheets of flooring.