Patent ID: 6588475
Filing Date: 2003-07-08
Classification: B29C,B29L,E04D,F23D,Y10T

Abstract:
A device for welding first and second overlapping roof membranes, comprising:a chassis having a front end and a back end, said front end having a handle; a guide attached at the back of the chassis to align the first roof membrane mounted in a chassis opening, said guide being positioned to engage said first roof membrane to unroll over the second membrane as the device is moved forward; a pressure roller attached to said chassis rearward of an air discharge chute; said air discharge chute having an inlet port and an outlet port, the air discharge chute outlet port being positioned at the back end of said chassis relative to a direction of movement of said device, said outlet port of said air discharge chute is tapered and elongated having air balancing fins so that air discharged through said outlet port of said discharge chute is evenly dispersed; a flame distribution assembly within said air discharge chute, said flame distribution assembly having a primary burner and an ignition source, the discharge chute having a deflective means between the inlet port and the outlet port to contain within the discharge chute a flame generated by the flame distribution assembly; a control unit to ignite said primary burner by said ignition source; a gaseous fuel source inlet connection being attached to said flame distribution assembly; a blower connected at said inlet of said air discharge chute so that heat generated by the primary burner is forced by the blower and directed through said air discharge outlet for welding said overlapping roof membranes; and an operator control switch reciprocally mounted on the handle, the operator control switch engagably communicating with a purging sequence mechanism to start the blower before igniting said primary burner.