At the Austrian location of Frohnleiten, an air knife had previously been used in the BM 3 for the middle coat. The unit led to some limitations. The maximum machine speed was 550 m/min and the maximum solids content was 42%. In addition, coverage of the board by the air knife was only moderate and the running characteristics were impaired by breaks and frequent cleaning intervals.
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机译：在奥地利的Frohnleiten地区，BM 3曾使用过气刀作为中间涂层。该单位导致了一些限制。最高机器速度为550 m / min，最大固体含量为42％。另外，气刀对板的覆盖仅适度，并且由于中断和频繁的清洁间隔而损害了运行特性。
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