During the pouch/bag forming phase vacuum is often applied to transport belts that help provide a grip on both sides of the pouch/bag material. The vacuum belt moves the pouch material from a web roll into position to receive the product from the filler. Holes in the belt allow vacuum to hold the pouch while the belt is rotating and feeding the pouch material through the machine. There is often a use of a vacuum conveyor to fill the bag with its content, if it is granules, powder or tablets.
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