Abstract: An apparatus for infolding and sealing the side and end bottom flaps of a carton includes a unique bottom side flap infolding system comprising flap infolding arms mounted to rotary cylinders for automatically infolding and supporting the bottom side flaps. The rotary cylinders are actuated by a sensor which senses the presence or absence of a carton in the apparatus. The apparatus also includes a unique assembly comprising downwardly inwardly inclined rollers mounted to the conveyor side arm assemblies to urge the carton downward toward the lower sealing head to assure a complete and continuous bottom seal. The apparatus may also include transversely adjustable guardrails, a hold down flange to maintain the carton against the packing plate and a carton urging assembly for urging the carton through the apparatus.

Abstract: A carton erector apparatus for setting up foldable carton blanks. The apparatus includes a carton blank storage section, a carton blank setup section and a bottom flap folding section. A carriage assembly delivers a setup carton from the setup section into the bottom flap folding section. Means is provided to selectively control the distance that the carriage assembly travels into the bottom flap folding section during each cycle.