| 摘要 |
<p>The powder sampler comprises, at the bottom, a measured powder supply hopper (2). A horizontal tube (1), whose end (10) has a lower opening (12), contains an Archimedes screw (3) for bringing the powder to the opening. The tube is transversely blocked in the rear and at the edge of the opening by a disc (4) displaced along a longitudinal shaft (30). The opening edge has a chamfer (40) facing the screw, which is held in position by a spring (5), and applied against the face (4) opposite to that facing the screw. The blocking disc which is threaded on to an extension of the Archimedes screw shaft has the possibility of being rotated.</p> |
