Conveyor mechanism guide - has rail with two running surfaces for rollers inclined to each other

The guide is particularly for mine shaft conveyors, have plastic foil with Z-fold and a welded seam in its bottom. The inner sack (2) is joined with the outer sack (1) by a bottom seam (6, 8) of the outer sack (1). Between the bottom seam (6, 8) of the outer sack (1) and the bottom welded seam (3) of the inner sack (2) is positioned a tear off weakness line (4) along which the inner sack (2) is separated from the outer sack (1). The bottom seam (6) of the outer sack (1) is positioned in a reinforcing strip (7) and when the outer sack (1) is produced from a plastic foil the bottom seam (6) takes the form of a welded seam (8).