Patent ID: 7094298
Filing Date: 2006-08-22
Classification: B29C,E04D,Y10T

Abstract:
1. Apparatus for heat welding to each other two overlapping thermoplastic membranes mounted on a surface, the apparatus comprising: a frame having drive wheels mounted thereon for locomotion of said frame; a support member connected to said frame; a nozzle mounted on said support member and adapted to receive heated air from a heat source mounted on said frame, said nozzle being adapted to direct the heated air to a weld location between the two membranes; weld wheels mounted on said support member and mounted adjacent to, and in operation immediately following, said nozzle for pushing a heated portion of the upper one of the membranes toward the underlying membrane to effect a weld; wherein said support member is adapted to be fixed to said frame member in a first position proximate a first side of said frame for welding the two membranes together, is adapted for release from the first position, is movable on said frame to a second position nearer a second side of said frame, and adapted to be releasably fixed to said frame at the second position for welding one of the membranes to an underlying edge piece mounted on a free edge of the surface.