| 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). |
