Problemarea I
By necessity, attaching a support wheel to the machine, this will run constantly in the unswept area. As a result, larger particles of dirt can block the operation of the sweeper.
Problemarea II
Due to the front-mounted dirt container, any garbage must initially fit through the “eye of a needle”. Thus the size of the dirt that can be taken in is greatly limited.
Problemarea III
The dustpan-like slope, up which the debris is swept, must not exceed a certain distance from the ground, in order for the garbage to even enter the container. Therefore the fill volume is greatly limited, because as soon as the captured debris goes beyond the edge, it falls towards the roller again.
Problemarea IV
A rubber lip under which the debris must be passed in order to be taken in by the sweeper roller prevents lighter pieces such as paper or dry leaves from being taken in, especially on smooth ground.
The numerous shortcomings of this very simple sweeping principle forced further development.
The roller throw technology was developed – but only for motorized sweepers.