Patent ID: 9016343
Filing Date: 2015-04-28
Classification: B29C,B29D,Y10T

Abstract:
1. An apparatus for welding butt-jointed longitudinal edges of a plastic panel to form a tubular lining of a wastewater pipe, the apparatus comprising: a retainer for the butt-jointed longitudinal edges comprising first and second clamping devices, wherein each clamping device comprises a stationary clamping bar on the outside of the pipe, a movable clamping bar on the inside of the pipe, and an actuating drive connected to the movable clamping bar, wherein the stationary clamping bars are located opposite of one another with respect to the butt joint between the two longitudinal edges such that a gap is provided between the stationary clamping bars which exposes the butt-jointed longitudinal edges, wherein at least one of the two movable clamping bars forms a stop for one longitudinal edge of the plastic panel in a position placed against the associated stationary clamping bar, a welding device, and a guide provided along the gap between the stationary clamping bars for guiding the welding device along the gap.