| 摘要 |
<p>A filtration device (1) comprises a supporting panel (2) having longitudinal slots (3) which are inserted to close the chamber of hood movable member (10) formed by contoured profiled members arranged longitudinally side by side to overlap with respect to the slots to form a labyrinth-like path that is adapted to be crossed by aspirant fumes and vapors and two heads (11) are associated with the supporting panel at opposite sides having guides (14,15). The guides coupled to the opposite ends of movable member allows the sliding of movable member between a lowered inactive to cover the slots of supporting panel and raised active position produced by the suction induced in the compartment of the hood to produce aspiration through slots of the supporting panel.</p> |
