For pre-glued and wrap-around cartons The bar system seals the film fed by two reels, while the oven subsequently shrinks it around the product. A pneumatic cylinder pushes the bundle past the sealing bars, wrapping it in the film. The closing of the bars then takes care of the sealing. The temperature of the sealing bars is electronically controlled and the closing movement is pneumatically operated. The film is hot-cut inside the bars.