Abstract: Bagging apparatus includes first and second horns at least one of which is movable. A carriage for supporting a stack of bags is reciprocable toward and away from a loading position wherein the carriage is beneath the horns and the uppermost bag on the carriage is telescoped over the horns. Then said one horn is movable to stretch the bag at its mouth so that an article may be inserted into the bag. Pneumatic circuitry is provided to cause the movable horn and carriage to be automatically cycled in a predetermined manner. As the carriage moves toward the loading position, an air jet causes the uppermost bag on the stack to be opened.