This type of equipment is designed to erect a carton from a folded and pre-scored blank, pack a product into the carton, and then seal the carton. Automatic cartoners are designed to accomplish this without input from an operator. They can be loaded vertically or horizontally, and are designed to be either intermittent or continuous motion. Intermittent refers to the start and stop action of the carton while another operation occurs, such as loading the carton. Continuous motion allows the carton to continue to move at a constant motion without stopping. Semi-automatic cartoners may require hand loading or filling the boxes. A sleever distributes and opens sleeve-like boxes (no closure on two sides), then pushes the product into the sleeve.