A particle filling line comprises a vertical conduit that is arranged to dispense
particles to one or more containers that are disposed on an included movable conveyor
belt. The conduit includes a conduit hollow, a conduit top and a conduit bottom
that defines an outlet. Particles supplied to the conduit top flow through the
outlet to fill the containers. The conduit is filled with particles. The particles
include a particle spacing air. The particle spacing air is reduced by means of
a porous tube that is fixed in the conduit hollow and coupled to a vacuum source.
After reducing the particle spacing air, the particles flow through the outlet
to be received in the containers.