| 摘要 |
The machine for the packaging of products with stretchable and thermoplastic film comprises: - Means for the tubularisation of a wrapping film (5) taken from a feeding bobbin and means (6) for the longitudinal tight-seal welding of the superimposed edges of such tubularised film; - Means (7, 7') which alternate in the transversal grip of the head of the tubular wrapping which comes out from said tubularisation means, which are pre-arranged for the longitudinal movement of said wrapping, to longitudinally stretch it and to perform on same two transversal, parallel and tight seal weldings, a transversal cut placed between the said weldings and to retain the wrapping upstream and downstream of the two welded zones separated by the cut, - Means (2, 3, 4) for the cyclical introduction of a product (P) through the inlet of said tubularisation means (1) and up to its outlet; - Means (10) to temporarily support the packaging being formed; - Means (12, 12') to stop the forward movement of the tubular wrapping on the outlet mouth of said tubularisation means (1), to allow the longitudinal stretching of the wrapping in its formation phase, under the action of the active one of said gripping, double welding and interposed cutting means (7, 7'); - A conveyor (11) for taking and moving away the formed packaging (Z). |
