| 摘要 |
An enclosing structure (S), in particular for enclosing and isolating outer environment of a packaging machine includes a plurality of enclosing panels ( 2 ), suitably and air-tightly assembled. At least one of the panels ( 2 ) defines a separating surface ( 1 ) for separating two different environments (A,B). Conveying means for conveying flows of purified air (F,F 1 ,F 2 ,F 3 ,F 4 ) are associated to the panel ( 2 ) to define, together therewith, a fluid-dynamic barrier, which avoids relative contamination between one environment (A) and the other environment (B).
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