Apparatus and procedure for the drawing of films in motion
AssigneeNuova Pansac S.P.A.
InventorsFabrizio Lori, Graziano Bortoletto
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Abstract
This invention relates to an apparatus (1) for the transversal drawing of a film (2) in motion, comprising a pair of rollers (3, 4) rotating on parallel axes, fitted with toothed surface profiles (5, 6) capable of compentrating without touching each other and defining a wavy passage (7) for the film, where the rounded tips of the toothed profiles (5, 6) of the two rollers (3 and 4) define the points of application of the drawing action on the film (2).
Claims8
An apparatus (1) for the transversal drawing of a film (2) in motion, comprising a pair of rollers (3, 4) rotating on parallel axes, fitted with toothed surface profiles (5, 6) capable of compentrating without touching each other and defining a wavy passage (7) for the film, where the rounded tips of the toothed profiles (5, 6) of the two rollers (3 and 4) define the points of application of the drawing action on the film (2).
A procedure for drawing a polyolefine film in motion, comprising a phase of passing the film across a wavy passage (7) in a transversal sense (2) with respect to the direction of forward motion of the film (2), so as to subject the film to a multiple number of transverse stretching actions, distributed over its entire width.
Dependencies are inferred from the claim text.