Convertible flap folding mechanism

摘要

A carton having upper and lower end flaps and which is movable along a path of movement is manipulated by a machine having upper and lower rotatable flap folders mountable in either a fixed primary or a movable secondary location. The secondary location being movable in an upstream fashion relative to the direction of carton flow. A driving element and a driving mechanism that moves the secondary folder and rotates it to retain a timed relation with the path of movement of the cartons.