A device comprising a conveyor , said conveyor - having a support surface for an object, and - a barrier , wherein said barrier - comprises a barrier body , a bottom side for contact with the support surface and a top side, and - is moveable relative to the support surface with a directional component, which directional component is i) parallel to the support surface and ii) transverse to the direction of movement of the support surface ; wherein the barrier comprises a multitude of independently moveable barrier elements having free distal ends for contact with the support surface and defining the bottom edge of the barrier ; characterized in that - said barrier body comprises an oversized slot oriented transverse to the vertical, and the barrier elements are mounted in the slot with the distal ends thereof protruding from the slot ; - the barrier elements are mounted such in the oversized slot that the distal ends of the barrier elements are moveable with a vertical directional component, said movability of the barrier elements comprises translatability with a vertical component, and the movability of the barrier elements comprises rotatability about an axis parallel to the support surface and over an angle α of at least 5° and less than 45°. - having a support surface for an object, and - a barrier , wherein said barrier - comprises a barrier body , a bottom side for contact with the support surface and a top side, and - is moveable relative to the support surface with a directional component, which directional component is i) parallel to the support surface and ii) transverse to the direction of movement of the support surface ; - comprises a barrier body , a bottom side for contact with the support surface and a top side, and - is moveable relative to the support surface with a directional component, which directional component is i) parallel to the support surface and ii) transverse to the direction of movement of the support surface ; wherein the barrier comprises a multitude of independently moveable barrier elements having free distal ends for contact with the support surface and defining the bottom edge of the barrier ; characterized in that - said barrier body comprises an oversized slot oriented transverse to the vertical, and the barrier elements are mounted in the slot with the distal ends thereof protruding from the slot ; - the barrier elements are mounted such in the oversized slot that the distal ends of the barrier elements are moveable with a vertical directional component, said movability of the barrier elements comprises translatability with a vertical component, and the movability of the barrier elements comprises rotatability about an axis parallel to the support surface and over an angle α of at least 5° and less than 45°. - said barrier body comprises an oversized slot oriented transverse to the vertical, and the barrier elements are mounted in the slot with the distal ends thereof protruding from the slot ; - the barrier elements are mounted such in the oversized slot that the distal ends of the barrier elements are moveable with a vertical directional component, said movability of the barrier elements comprises translatability with a vertical component, and the movability of the barrier elements comprises rotatability about an axis parallel to the support surface and over an angle α of at least 5° and less than 45°. - the barrier elements are mounted such in the oversized slot that the distal ends of the barrier elements are moveable with a vertical directional component, said movability of the barrier elements comprises translatability with a vertical component, and the movability of the barrier elements comprises rotatability about an axis parallel to the support surface and over an angle α of at least 5° and less than 45°. <EOS>