| 摘要 |
<p>Mixing apparatus for powders, having a plate shaped discharge flap valve, having a sealing gasket around its circumference. This gasket has a plate shaped edge projecting beyond the plate edge and cooperating with a perpendicular edge of the discharge aperture. When the flap is closed, the gasket edge is folded, so that powder sticking to its chips off, ensuring always perfect sealing of the valve.</p> |
