Patent ID: 7971617

Claim:
A welding machine comprising: a frame including: a pair of end supports; a top beam longitudinally spanning the end supports; a vacuum track assembly disposed vertically beneath the top beam and being longitudinally aligned therewith; wherein a portion of said vacuum track assembly is adapted to retain a fabric to be welded thereon; and wherein the vacuum track assembly comprises: a first vacuum tube having a top wall; a first bore defined in the first vacuum tube; a plurality of first holes of a first diameter being defined in the top wall, the first holes being in communication with the first bore; and wherein the first vacuum tube is adapted to be connected to a vacuum source to evacuate air from the first bore; a plurality of second holes of a second diameter being defined in the top wall of the first vacuum tube adjacent the plurality of first holes; said second holes being in communication with the first bore; and wherein the first diameter is smaller than the second diameter; and a welding head mounted for reciprocal longitudinal travel along the top beam and disposed vertically above the portion of the vacuum track assembly, the welding head being adapted to apply heat and pressure to the portion of the vacuum track assembly to weld the fabric retained on the portion of the vacuum track assembly.