My idea is as followed.
In my layout I am starting with the material cement in tonnes per hour and ends with cement in bags per hour (25kg/40kg or 50kg).
In this process, my cement will transfered through a bucket elevator and a screen into a storage silo over the packing machine.
The packing machine is a roto packer which filles the cement in one turn around into a bag.
After that, the bag fell on a discharge line and will be transported to a truck loader or a palletizer.
So I think, it might be very helpfull if we could build also processes like this, where processes starts in materials and ends in the product.