With flat-to-trough and trough-to-flat transitions, as well
as by the tracking of a conveyor belt through convex or
concave vertical curves, the belt edges run a different way
than the belt midsection. This results in the distribution
of belt forces not being constant over the entire width of
the belt. That is also valid for the running operation of the
horizontal curve in which one belt side is more burdened
than the other.