Assembly for automatically unrolling and cutting stretch film

Details Assembly for automatically unrolling and cutting stretch film Assembly for automatically unrolling and cutting stretch film

2003-11-14

2008-03-25

Gerrity, Stephen F. (Department: 3721)

Package making

Apparatus for contraction of cover by stretching or shrinking

C053S389300, C053S389400, C225S052000

Reexamination Certificate

active

07347035

ABSTRACT:
An assembly is disclosed for unrolling and pre-stretching stretch film as the film is fed from the assembly to goods/products to be wrapped or packed. The assembly comprises a first member for controlling the unwinding of the film from a spool, and a cutter arranged downstream of the control member for lacerating the film, the assembly further comprising a second member, downstream of the cutter, for preventing return of the film in a direction opposite to that in which the film leaves the assembly. A cutting procedure, according to another aspect of the present invention, comprises the steps of: following an initial stop of the film during which it is cut, the first, control member is unlocked so as to permit the laceration zone of the film to pass downstream of the second, return preventing member. The film then comes to a new stop to complete the cut following relative motion between the assembly and the goods/products to be wrapped or packed.

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