US Patent 7739856 Packaging machine with gluing station and folding station

An apparatus for forming an end closure structure of a carton. The end closure structure is formed from minor end flaps and major end flaps. The apparatus includes a carton conveyor for transferring the carton in a flow direction along a carton conveyor path, a major end flap retaining guide assembly for retaining the major end flaps in an outwardly upright position, a minor end flap retaining guide assembly for retaining the minor end flaps in an inwardly folded position, and a gluing station for applying adhesive to the major and minor end flaps.