Tentering chain guide track for roller-supported tenter clamps

A tentering chain guide track for roller-supported tenter clamps which hold a material web in a defined horizontal tentering plane, comprising carrier means for carrying said guide track, truss means secured to said carrier means for supporting said tenter clamps, said truss means extending above and substantially in parallel to said horizontal tentering plane, a first vertically extending stationary guide rail arranged in said truss means closer to said clamps and a second vertically extending stationary guide rail arranged in said truss means closer to said carrier means, said first and second stationary guide rails extending substantially perpendicularly to said horizontal tentering plane and in parallel to each other, said first and second stationary guide rails being supported by said truss means between said clamps and said carrier means, movable support roller means secured to said tenter clamps so that rotational axes of said movable support roller means extend horizontally and so that at least one upper movable support roller bears against an upper edge of one of said stationary guide rails projecting above said truss means and so that at least one lower movable support roller bears against a lower edge of the other of said stationary guide rails projecting below said truss means for taking up vertical forces and for counteracting tilting moments exerted on said clamps, running guide roller means secured to said tenter clamps in such a position that all rotational guide roller axes extend vertically, said guide track further comprising a single central guide roller plane in which all guide rollers of said running guide roller means are located, said single central guide roller plane extending perpendicularly to said rotational guide roller axes, said single central guide roller plane substantially coinciding with said horizontal tentering plane, at least one of said first and second guide rails projecting below said truss means and just sufficiently below said single guide roller plane for cooperation with said running guide roller means for taking up horizontal forces, said guide track further comprising drive means located just below said lower movable support roller, whereby a vertically short structure is obtained.