Patent ID: 7641141

Claim:
A method for winding up and removing a careless roll ( 12 ) of an extensible or stretch plastic film ( 10 ) for packaging wound onto a spindle ( 11 ), comprising: providing said spindle ( 11 ) with an air chamber ( 11 P) having perforations ( 34 ) on a peripheral wall ( 11 W); winding up the plastic film ( 10 ) directly on the perforated wall ( 11 W) of the spindle ( 11 ); causing a radial expansion of internal turns of the roll ( 12 ); supporting the expanded roll ( 12 ) by a cushioning of pressurised air, during withdrawal of the roll ( 12 ); at a removal of a wound up roll ( 12 ), causing an expansion of some internal turns of the roll ( 12 ) by feeding a pressurised air flow through the air-chamber ( 11 P) of the perforated wall ( 11 W) of the spindle ( 12 ), into the internal turns of the roll ( 12 ), to disengage the internal turns from said perforated peripheral wall ( 11 W) of the spindle ( 11 ); and during removal of the roll ( 12 ), controlling the air flow by changing an air-flow rate emerging from perforations ( 34 ), from a rear end to a fore end of the perforated wall ( 11 W).