Patent ID: 7454879

Claim:
A device for folding the lids of rigid packets in machines for making such packets, comprising a plurality of pockets accommodating respective packets each presenting an upwardly projecting appendage foldable to form a relative lid, and a conveyor by which the pockets are fed along a predetermined folding path between an infeed point and an outfeed point of the folder device, wherein it comprises a pulley, centered on a relative axis of rotation, around which the conveyor is looped partially in order to establish the predetermined folding path, and a folder unit, mounted to the rotating pulley and operating in close proximity to top portions of the pockets in such a way as to bend the upwardly projecting appendages of the packets, and wherein the folder unit comprises at least one folder arm anchored mechanically to the rotating pulley and equipped with a pusher element positioned to engage a first lateral portion of the appendage presented by a packet, and cam drive means by which the folder arm is moved relative to the rotating pulley between a first position and a second position during the rotation of the pulley.