| 摘要 |
<p>An apparatus is provided for sealing seams between adjacent sheets of flooring which define an upwardly facing, elongated groove where they meet. A conventional hand-held portable seam welding gun (22) has a body (24) defining a longitudinal axis (26). A heat concentration nose (34) is mounted on a heat conducting member. A heating tip mounting post (42) projects at an angle of at least about fifteen degrees, from the longitudinal axis of the seam welding gun. A hollow heating tip (44) employed on the mounting post (42) is provided with a forwardly directed, upturned toe (58) having a concave, downwardly facing groove therein forward of the front extremity of a sealant dispensing mouth. Also, a heating duct extends between the melting chamber of the heating tip and an orifice located behind the rear extremity of the sealant dispensing mouth. The welding gun employs a mobile, stabilizing guide (66) formed with a pair of laterally spaced outboard rollers (80,82) and a seam follower (84) located midway between the rollers and a track follower that rides in the groove between adjacent flooring sheets. An adapter (86) secures the guide to the welding gun body. A releasable fastener between the guide and the adapter holds the welding gun at a desired angle to the floor.</p> |
