An operator fed adjustable sealer that can also be converted to an operator free adjustable 1-edge sealer with the addition of a matching adjustable indexer. Depending on the motor drive speed used the MT1E can reach cartons speeds of over 45 cartons per minute. This sealer excels at one edge sealing clamshell, flap tuck and flap edge lock type cartons both in corrugated and chipboard. Additional options available for the MT1E model include: Second timer for multi-able tabs on the single carton edge, spare parts kit, infeed/exit conveyor w/L-bracket stabilizer, heavy duty dual locking casters, High speed motor upgrade (Up to 125ft./mm.), indexer (for fully automatic function), low or no tape sensor and alarms, food grade 304 stainless steel.