In this system, the belt runs under the rollers giving
them movement. This system's main advantage is the possibility to acquire
different levels of accumulation of the materials to be handled. Adjusting the
belt's pressure that generates over the rollers gives the option of making
different systems. From systems with a small accumulation possibility, to
systems where the materials can be stopped very easily. It is very useful for
medium or small loads moved in boxes or trays.