| 摘要 |
<p>A volumetric metering system (20) for a seeding machine (10) is provided with a plurality of movable inserts (82, 182) each insert (82, 182) defining a ledge (84, 184) over which the seed falls to the meter outlet (54). The inserts (82, 182) are selectively movable between an open position in which seed is allowed to flow over the ledge (84, 184) and a closed position in which the inserts (82, 182) close the product flow to the outlet. By locating the product shut-off after the meter (20) but before product enters a distribution system (22), there will only be a short delay in stoppage of product flow once the shut-off is closed.</p> |
