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These types of cartoners can be automatic or semi-automatic. Generally a tri-seal or top load cartoner uses a box with a lid that is hinged on one side. The box is folded over at the hinge, then sealed shut on the other three sides. Automatic Top-Load cartoners erect a box from a flat folded carton blank, load the box, and then seal it shut. Semi-automatic cartoners may need a person to erect and fold the boxes, or load them. Top-Load cartoners can be continuous or intermittent. Top-Load cartoners are common for products such as frozen meals.