| 摘要 |
<p>The present invention provides a compact powdery material air-conveying apparatus to keep constant the ratio of a compactible powdery material to pressurized conveying air mixed with it so that a conveying pipe conveying the material will not clog. This is made possible by providing an upright and elongated mixing tube (2) that blows pressurized air up through a filter into which mixing tube (2) a powdery material supply tube having a screw-type feeding vane communicatively opens. A hopper (12) for containing the powdery material is mounted above the supply tube (8) to communicate with the tube, and a check valve lid (16) is mounted on the end of the supply tube (8) that opens into the mixing tube (2).</p> |
