| 摘要 |
A packaging unit (1) for producing sealed packages of a food product pourable into a tube (10), comprising a duct (20) for pouring food product into tube (10), a flange (25) housed within tube (10) and having holes (22) through which food product flows, and connecting means (35) for constraining duct (20) to flange (25) and comprising two coupling elements (40a, 40b) fixed to and detachable from duct (20) and flange (25) in a first and in a second configuration, and locking element (50) movable with respect to coupling elements (40a, 40b) in the first configuration along a path (P) between a first position (P 1 ) in which coupling elements (40a, 40b) are kept in first configuration, and a second position (P 2 ) in which coupling elements (40a, 40b) can reach the second configuration; unit (1) has constraining means (49, 59) interposed between coupling elements (40a, 40b) and locking element (50) at a third position (P 3 ); locking element (50) is movable with respect to coupling elements (40a, 40b) crosswise to path (P) at third position (P 3 ) between a fourth position in which first constraining means (49; 59) prevent locking element (50) from moving along path (P), and a fifth position (Q 2 ) in which locking element (50) can move along path (P).
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