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.
Band sealer machines are mostly automatic and require minimal operator input to function.
Band sealers often feature adjustable settings and sealing parameters which result in optimal seal quality. Essentially you are sealing under the same conditions for each seal cycle. These machines are less exposed to the human error risks that come with other manually operated machines.
Speed is also an important factor as band sealers are highly suited for high volume sealing projects. They can potentially seal thousands of packaging pieces a day particularly when used in tandem with each other, multi machine/operator & shifts set ups.