Patent ID: 6964147

Claim:
An operating method for a packaging machine of the “sleeve” type, which wraps sheets of packaging material around objects, in which the said machine comprises: a first object conveyor for feeding the objects longitudinally in a spaced sequence; a second object conveyor, located downstream of end at a short distance from said first object conveyor thus forming a first opening between said first and said second object conveyors for receiving objects arriving from said first object conveyor and for transporting said objects along a wrapping plane which has an entry end and an exit end; a third object conveyor located downstream of and at a short distance from said second object conveyor and forming therewith a second opening between the second and said third object conveyors for receiving the objects arriving from said second object conveyor; a sheet wrapper, located in proximity to said second object conveyor and comprising at least one suspended wrapping bar which is oriented transversely with respect to a direction of advance of the objects and adapted to move through said first and said second openings along an orbital path which circumscribes the top of the said second object conveyor, and can transport said sheets; a sheet conveyor having a conveyor belt, positioned underneath and aligned with said first opening, for feeding the sheets into said first opening (A 1 ); and a synchronizer for synchronizing said sheet wrapper with each other, said synchronization causing an accumulated portion to form on said conveyor belt, said accumulated portion of material being of the undulating type with at least two crests; moving on said conveyor belt and toward said first opening at least a portion of accumulation of packaging material; and moving the wrapping bar upward through said first opening when said portion of accumulation of packaging material is disposed in proximity of said first opening.