An apparatus for handling a hollow glass article and forming a finish thereon in a production line. Glass articles, such as containers, having an integrally formed moil portion on the upper end of the container body portion are loaded in sequence in an upright position into uniformly spaced chucks on the upper run of a continuously moving endless conveyor. The conveyor carries the container around a vertical end turn to enable the moil to drop freely upon severance by a burner assembly extending along the lower run of the conveyor. The conveyor is of the endless chain type with container chucks mounted upon transversely extending link pins of the chain, the chain being guided throughout its path by stationary track assemblies upon which chain carried rollers are supported. A main drive sprocket is drivingly engaged with both the upper and lower runs of the chain at a location between the end turns, while a second or slave drive sprocket engages the lower run of the chain only. Tension in that portion of the lower run of the chain between the points at which it is engaged by the main and slave sprockets is regulated by adjusting the speed of the slave drive sprocket motor relative to the main sprocket drive motor, this particular section of chain traversing the burner assembly through which a relatively high degree of chain tension is desired. Longitudinally adjustable end turn track sections, combined with the three point engagement between the sprockets and chain enable the tension in various sections of the chain to be regulated or adjusted independently of one another. Parabolic merging sections of the chain track are provided between the horizontal upper and lower runs and the curved end turn sections to minimize centripetal acceleration imparted to chucks carried by the chain as the chucks pass from the straight upper and lower runs to the curved end turn sections.