Method and apparatus for wrapping
AssigneeAetna Group S.P.A.
InventorsMauro Ceré, Gabriele Canini
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Abstract
A method for wrapping a load with a film, strip, band of extensible material comprises: unwinding a film of extensible material from a reel; making a pleat on the film by means of a pleating system; stretching the film by means of a pair of pre-stretching rollers; welding the pleat by means of at least one of the pre-stretching rollers; wrapping the load with the film provided with the pleat.
Claims13
A method for wrapping a load with a film or strip or band of extensible material, comprising:
- unwinding said film of extensible material from a reel;
- making at least one pleat on the film by means of a pleating system, said pleat being parallel to a movement direction of said film;
- stretching said film by means of a pair of pre-stretching rollers;
- welding the at least one pleat by means of at least one of said pair of pre-stretching rollers;
- wrapping the load with the film provided with said pleat.
An unwinding apparatus associable with a wrapping machine and arranged to deliver a film or strip or band of extensible material unwound from a reel, comprising:
- a pair of pre-stretching rollers arranged to unwind and pre-stretch said film;
- a pleating system positioned upstream of said pre-stretching rollers with respect to a movement direction of the film and configured to make at least one pleat parallel to said movement direction on the film;
- wherein at least one of said pair of pre-stretching rollers is heatable so as to weld said at least one pleat.
Dependencies are inferred from the claim text.