With the packaging material lined on top of the product feed, Horizontal Form, horizontal flow wrapping machines operate horizontally to encose the product with a wrapping film. After sealing it longitudinally under the product, the rotary knifes seal the edges transversely and at the same time cut into individual packs. Horizontal Flow Wrappers (HFWs) are suitable to pack large quantities of solid products at high speed. Chocolate candy bars are usually packed with non-heated sealing knifes. This cold-seal technology uses an, on the foil pre-applied glue, which is pressed to close the packs.