Appts for the continuous welding of bitumen roof sealing webs has a moving chassis with gas burners on each side in front of the press rollers to fuse the overlapping edges

摘要

The appts., to give a continuous welding of overlapping webs of roof sealing materials, has a moving chassis with at least one press roller and retainer. The welding is through a gas burner to fuse the materials along the seam. A gas burner head (50,60) is on both sides of the moving chassis (10). The gas burners (50,60) are in front of the material press rollers (20,30), in a mirror image array on both sides of the chassis (10).