Patent ID: 7165378

Claim:
Machine for the packaging of products with stretchable and thermoplastic film, characterized by the fact of comprising: tubularization means comprising a tubular forming head device having an inlet and an outlet, for the tubularization of a wrapping film taken from a feeding bobbin and means for the longitudinal tight-seal welding of the superimposed edges of such tubularization film; means which alternate in the transversal grip of the head of the tubular wrapping which comes out from said tubularization means, which are pre-arranged for the longitudinal movement of said wrapping, to longitudinally stretch it and to perform on same at least 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 for the cyclical introduction of a product through the inlet of said tubularization means and through the outlet of said tubularization means thereby advancing the tubular wrapping film; means to temporarily support the film wrapped packaging being formed downstream of said tubularization means; means to brake the forward movement of the tubular wrapping film by pressing it against the outlet end of said forming head device to longitudinally stretch the wrapping in its formation phase, under the action of the active introducing means and one of said gripping, double welding and interposed cutting means; and a conveyor for the taking and the moving away of the cyclically formed packaging.