Patent ID: 6874302

Claim:
System for a sleeve-type packaging machine, which wraps pieces ( 2 ) of packaging material around articles ( 1 ), in which the said packaging machine comprises: first article conveyor means ( 10 ), for feeding the articles ( 1 ) longitudinally in sequence and spaced apart from each other; second article conveyor means ( 20 ), located downstream and at a small distance from said first article conveyor means ( 10 ), thus creating a first opening (A 1 ) between said first ( 10 ) and said second ( 20 ) article conveyor means, the second article conveyor means being able to receive the articles arriving from said first article conveyor means ( 10 ) and to carry said articles ( 1 ) along a wrapping plane which has an entry end and an exit end; third article conveyor means ( 30 ), located downstream and at a small distance from said second article conveyor means ( 20 ), thus creating a second opening (A 2 ) between said second ( 20 ) and said third ( 30 ) article conveyor means, the third article conveyor means being able to receive the articles ( 1 ) arriving from said second article conveyor means ( 20 ); means ( 40 ) for wrapping the pieces of sheet, located in the proximity of said second article conveyor means ( 20 ), and comprising at least one suspended wrapping bar ( 41 ), oriented transversely with respect to the direction of advance of the articles ( 1 ), and made to move through said first (A 1 ) and said second (A 2 ) opening along an orbital path passing over the top of said second article conveyor means ( 20 ), the bar being capable of carrying the pieces ( 2 ) of wrapping material; piece conveyor means ( 50 ) with a conveyor belt ( 51 ), positioned longitudinally below and in alignment in the proximity of said first opening (A 1 ), for feeding the pieces ( 2 ) of packaging material in the proximity of said first opening (A 1 ); and control means ( 70 ) comprising a first modular unit (T 100 -G 100 ) which is located under the first article conveyor means ( 10 ) and is movable and positionable with respect to the packaging machine, for forming and feeding pieces (S 1 ) of packaging material, said first modular unit being functionally connected to the control means ( 70 ); a second modular unit (T 200 -G 200 ) which is located under the first article conveyor means ( 10 ) and is movable and positionable with respect to the packaging machine, for forming and feeding pieces (S 2 ) of packaging material, said second modular unit being functionally connected to the control means ( 70 ); and said first modular unit (T 100 -G 100 ) and said second modular unit (T 200 -G 200 ) assume at least two positions, namely a first position in witch the modular unit (T 100 -G 100 ; T 200 -G 200 ) is positioned at least transversely at the side of the packaging machine, and a second position, in which the modular unit (T 100 -G 100 ; T 200 -G 200 ) is positioned under the packaging machine in order to feed the pieces (S 1 , S 2 ) towards and above the conveyor belt ( 51 ) of the piece conveyor means ( 50 ).