A band sealing machine, also known as a continuous band sealer or a continuous heat sealer, is a packaging machine used to seal various types of bags or pouches.A band sealer is a machine which uses heat and pressure to consistently seal pouch packaging in a continuous fashion. All devices feature a conveyor band or roller system to draw the pouches through the machine to apply a consistent heat and pressure forming a airproof, hermetic seal.Sealing machines are used to seal containers with liquids, granules, powders, and sprays for consumer, bulk, and original equipment manufacturer (OEM) supply shipments. Packaging materials include aerosol containers, bags and pouches, blister packs, bottles and jars, as well as cartons and boxes.