| 摘要 |
<p>A dispensing apparatus (30) is provided for a pulverulent material entrained in a stream of a transporting gas or mixture of gases. The apparatus (30) includes a first member and a second member (34,68). The first member includes (68) an interior into which the stream flows and a perimetral discharge edge. The second member (34) includes a side facing the interior and a perimetral discharge edge. A discharge opening is defined between the discharge edges of the first and second members (34,68). A dimension of the discharge opening is determined by one or more third members (32). Each third member (32) has a first end adjacent the first member and a second end adjacent the second member. The third members (32) have non-uniform transverse sections. A transverse section of each third member (32) between its first and second ends has a smaller area than the transverse section of each third member at one its first and second ends.
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