Automatic Four-corner Carton Sealer. After completing middle top-and-bottom sealing by the front-end sealer, the carton enters the 90-degree turning mechanism. Upon photoelectric sensing, the pusher plate pushes the carton to the corner-sealing station, which seals four top and bottom corners simultaneously with high efficiency. Two rows of brushes smooth the tape to cling tightly to the carton, delivering wrinkle-free folded corners with attractive and firm sealing. It is suitable for customers and manufacturers with high outer-packaging requirements, especially for export products and food industry. Widely used in food, pharmaceutical, beverage, tobacco, daily chemical, automobile, cable, electronics and other industries.