A right angle folder-gluer for folding paper boxes from box blanks has a mechanically actuated, timed, bumper-type magazine feed which feeds flat box blanks individually and successively onto an untimed conveyor in a flap folding zone. The folded blanks are then delivered to a right angle transfer zone in which a mechanically actuated pusher bar transfers each blank onto an untimed conveyor for advance through a glueing and folding zone. The bumper feed and transfer bar are positively, mechanically connected and powered for semi-automatic operation and the pattern glue wheel in the glueing zone is also synchronized with the feed and transfer for full automatic operation.