This fully-automatic system employs precision belt drive technology to accurately position, close and seal cover flange seal cartons at line speeds of up to 150 cartons per minute. The precision positioning mechanism within the new system accommodates a full range of carton sizes and includes counters to ensure reliable, repeatable high-speed production of high-quality consumer packages at profitable production line speeds. The system employs a compact (38 in. wide by 104 in. long) inline configuration that enables it to align efficiently with a conveyor bringing cartons from upstream filling operations. It offers optional right or left lid positioning when entering the system. Construction is of welded mono-frame tubular stainless steel for maximum durability and harsh environment endurance, and a NEMA-12 electrical enclosure is standard.