3. Functional description
The conveyor hopper is used for the automatic conveyance of freely flowing plas- tic granules. The hopper can only function in connection with a vacuum conveyor plant.
The hopper works without a filter. Depending on the type of valve, the
On the hopper, there is a separate on/off switch (A) and a function controlling de- vice which indicates the following operational modes:
(B): lamp on - hopper switched on at the on/off switch (A); lamp flashes - the hopper is conveying
(C): lamp flashes - error
(D): lamp is on - hopper signals lack of material
