US 11,987,405 B2
Method and apparatus for wrapping a load and wrapping machine
Massimiliano Vaccari, Verucchio (IT)
Assigned to AETNA GROUP S.P.A., Verucchio (IT)
Appl. No. 17/298,239
Filed by AETNA GROUP S.P.A., Verucchio (IT)
PCT Filed Dec. 3, 2019, PCT No. PCT/IB2019/060380
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/115643, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 102018000010782 (IT), filed on Dec. 4, 2018; and application No. 102019000008298 (IT), filed on Jun. 6, 2019.
Prior Publication US 2022/0119139 A1, Apr. 21, 2022
Int. Cl. B65B 11/58 (2006.01); B65B 11/02 (2006.01); B65B 11/00 (2006.01)
CPC B65B 11/025 (2013.01) [B65B 11/58 (2013.01); B65B 2011/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for wrapping a load with film of stretchable plastic material with a single unwinding apparatus of a wrapping machine, the method comprising:
unwinding a first film of stretchable plastic material from a first reel and at least one second film of stretchable plastic material from a respective second reel;
superimposing the at least one second film to the first film so as to form a longitudinal overlapping band where the at least one second film and the first film contact each other;
stretching by a plurality of pre-stretching rollers the superimposed first film and at least one second film having the longitudinal overlapping band with a definite stretching percentage so as to obtain a single composite film formed by the superimposed first film and at least one second film joined and sticking tightly to each other at the longitudinal overlapping band due to said stretching; and
wrapping the load with a plurality of bands of the composite film.